Blackhole 2 exploit kit (partial pack) and ZeroAccess (user-mode memory resident version)

 This post is an addtion to the DeepEnd Research post Blackhole & Cridex: Season 2 Episode 1: Intuit Spam & SSL traffic analysis by Andre DiMino about the Blackhole 2 exploit pack and Cridex trojan alliance.

Here is for download a partial Blackhole 2 exploit pack. This pack has been shared with me a few times over the past couple of weeks as researchers discovered an blackhole server with open directories. While it is missing a few crucial files, it is still provides insight into the pack components, exploits, and structure.

The list of files in the pack are listed below. 16 files are zero in size (not on purpose, that's all I have) and are there just for your information. The zero size files are listed in the separate list below (in addition to being in the main list). The files and data directories contain the exploits ( cve-2012-1723, cve-2012-0507, cve-2010-1885, cve-2012-4681, cve-2010-0188) and the payload (ZeroAccess  among other malware, which is memory resident rootkit (thus no 'dropped', created files for ZeroAccess in the package, only the original dropper and all kinds of files genereated by the clickfraud component. Use Volatility or Redline/Memorize for analysis)
This captcha component of this pack was reviewed by
Behind the Captcha or Inside Blackhole Exploit Kit 2.0 - Exploit Kit Administration Panel (Malware Don't Need Coffee).

 Malware Must Die analysts have been tracking Blackhole 2 as well

CVE-2012-4969 Internet explorer 0day samples

The Internet Explorer 0day aka now CVE-2012-4969, have been used in a "small number of targeted attacks". The new Internet Explorer Zero day technical details came out (eromang.zataz.com), the Metasploit module is out now too and the number will increase exponentially as soon as exploit pack authors add it to their arsenal, which will happen very soon. This seems to be repeating the story of Java CVE-2012-4681. See CVE-2012-4681 samples Original (APT) and Blackhole 2.0 (crime)

There are a few mitigation workarounds you can use for now, the best is to upgrade your browser, however
Read more at http://technet.microsoft.com/en-us/security/advisory/2757760

CVE-2012-4681 samples Original (APT) and Blackhole 2.0 (crime)

Here are two samples of Java CVE-2012-4681 exploit - one from the original targeted attack described in our post on August 30, 2012 and the other from today's spam redirecting to Blackhole 2.0 exploit kit and using CVE-2012-4681 adapted from the Metasploit framework.
The Blackhole 2.0 ad is translated and posted at malware.dontneedcoffee.com along with a very good analysis.
The spam campaigns are probably different but the one I encountered was using the subject "ADP Invoice Reminder" with ADP_Online_Invoice_DoNotReply@adp.com address sent from what it looks like a spam botnet. The body of the email looks very convincing  - see the legitimate ADP email below in comparison to the fake one. The links are legitimate compromised websites redirecting to the Blackhole exploit server. The payload is Zeus (Gameover P2P version not Citadel). Many websites already cleaned and giving error 404 and some are still active. I posted approximately 50 headers below for those who deal with spam filters as well as pcap and other information.

Contagio file downloads are not available indefinitely (thanks to Mediafire and LeakID ideas about copyright)

Update5: 
Mediafire notified me the other day that they had confirmation from LeakID that the notices they submitted  were done in error. They restored all the file access.
I want to thank all who helped me with the posts and updates Paul Robert from SophosLabs, Soulskill- Slashdot, Dan Kaplan from SC Magazine for their articles, everyone who made posts on Twitter  and the Mediafire team for the über fast response to the posts and resolution. I guess LeakID do not speak to victims directly, never heard from them.

Java 7 0-day vulnerability analysis

Here is our second article about Java 7 0-day vulnerability. Read more at DeepEndResearch.org

ladyilonwick.wordpress.com

Considering that Rapid 7 posted a working exploit and addition to the exploit packs is imminent (Attackers Pounce on Zero-Day Java Exploit by Brian Krebs), plus other analysis articles are being published such as New Java 0day exploited in the wild  -by Alienvault, we decided that witholding details of the exploit will not offer additional protection but only hinder development of protection and signatures.

As we mentioned earlier, we contacted Michael Schierl, the Java expert who discovered a number of Java vulnerabilities and asked him to have a look. He sent back his detailed analysis, exploit source, the interim patch with the source code of the patched class.


Patch request:

• Interim patch with the source code of the patched class. See the Readme of the patch in the previous post (thanks to Michael Schierl). 

Email from your company email address to admin <at> deependresearch.org  and explain the planned use, please.

DeepEnd Research: Java 7 0-Day vulnerability information and mitigation.

img.kids.discovery.com

The cat is out of the bag. There is 0-day out there currently being used in targeted attacks.  The number of these attacks has been relatively low, but it is likely to increase due to the fact that this is a fast and reliable exploit that can be used in drive-by attacks and all kinds of links in emails. Interestingly, Mark Wuergler mentioned on August 10 that VulnDisco SA CANVAS exploit pack now has a new Java 0-day. It makes you wonder if it is the same exploit that leaked from or was found in the wild and added to the CANVAS pack. Or if it is totally unrelated and there are two 0-day exploits now.

The purpose of this post is not to provide the vulnerability analysis or samples but to offer additional information that may help  prevent infections on some targeted networks.   We all know what kind of damage Java vulnerabilities can cause if used in drive by exploits or exploit packs and we think that revealing technical vulnerability details  in the form of a detailed technical analysis is dangerous, while releasing working exploits before the patch is vain and irresponsible.

Oracle patch cycle is 4 months (middle of February, June, October) with bugfixes 2 months after the patch. The next patch day is October 16 - almost two months away. Oracle almost never issue out-of-cycle patches but hopefully they will do consider it serious enough to do it time.

Read more at DeepEndResearch.org

Shamoon or DistTrack.A samples

Image from Kaspersky lab

Here are a couple of Shamoon samples. Such destructive malware is rare because it does not really make much sense to destroy computers when you can steal data or use them.  

• Kaspersky Shamoon the Wiper - Copycats at Work 
•  W32/DistTrack.A Norman
• Shamoon, a two-stage targeted attack - Seculert

CVE-2012-1535 - 7 samples and info

I was still writing my analysis when Alienvault posted CVE-2012-1535: Adobe Flash being exploited in the wild and mine would be pretty much the repeat of the same. I don't like repeating so I will just post the samples and link to Jaime Biasco's article.  As you see from SSDeep they are nearly identical in size, exploit, and payload. All Word documents were authored by "Mark" and have same strings and indicators present as in the analyzed file.

3322 Dyndns badness

MD5


118f208998e12561b03200178edf826b members.3322.org PRORAT
c5ac14a3c80b3c6af4c943e0f3839fbe lengkusky1.3322.org Keylogger
03ac85edb00bcd8c6b4981ca67208f68 sfwu.3322.org
003212079a7c1de92b755a627f3913b7 sfwu.3322.org
c5a632a8e369e47a7e8f55f892c8d864 myyuming55.3322.org
c5a6de01e10c65a8894bcb32608055b5 yjdl.3322.org Puppetzombie.gen
8a41d4770858cb5af6860f95c00f8224 myyuming55.3322.org Virut
fe7d3e20d7bc640fe2edf645da218bd1 xinxin169.3322.org

Gauss samples - Nation-state cyber-surveillance + Banking trojan

Just a quick post for those who can't sleep until get to play with Gauss

Here is a great paper by Kaspersky Gauss:Abnormal Distribution 

and the blogpost: "Gauss: Nation-state cyber-surveillance meets banking Trojan"

Excerpt:
The highest number of infections is recorded in Lebanon, with more than 1600 computers affected. The Gauss code  (winshell.ocx) contains direct commands to intercept data required to work with Lebanese banks – including the Bank of  Beirut, Byblos Bank and Fransabank. 

In Israel and the Palestinian Territory, 750 incidents have been recorded." (Kaspersky)

CVE-2012-0158 generated "8861 password" XLS samples and analysis

Symantec recently posted an article by Joji Hamada titled "Password “8861” Used in Targeted Attacks", where the attackers continuously using the same passwords sent in emails together with the malicious attachment. Indeed, the password not only allows to evade detection but also makes it difficult to analyse the exploit itself.

All the samples i have that have this password appear to be created via a generator and share certain similarities. I will point out a few but you can find many more if you analyse the files and payloads.  

- Exploit CVE-2012-0158

The hallmark ListView2, 1, 1, MSComctlLib, ListView are clearly seen in the files, as well as excessive calls to MSCOMCTL.OCX during the dynamic analysis.

- Same password 

8861 could be the attacker's lucky number, or it is job related, or being a primary number, it plays some role in the RSA encryption implementation in this generator ( this one perhaps is a bit far fetched, but not more than other theories)

- Antivirus/Malware detection

These files are mostly detected as Exploit.D-Encrypted  by different AV vendors but this signature detects other malicious password protected documents  - it is not limited to this 8861 generator files.

Yara Signatures: You can develop your own yara signatures based on these and other indicators you find in the files. I will share signatures on Yara Signature Exchange Google Group. If you are interested in making and sharing, please see DeepEnd Research: Yara Signature Exchange Google Group
IDS:  Emerging threats IDS signatures - see below.

- Same file structure

They are each different sizes and have different payloads, however the first 120KB of each file are identical and are completley different from the headers of other typical user created password protected spreadsheets and other malicious and password protected XLS files. I will post two other malicious messages that were NOT generated using the same generator is seems and have a different password  (I don't know password for those two files yet, if your figure it out, please share)

- Same document code page 

Windows Simplified Chinese (PRC, Singapore)

- Same name for the dropped files (ews.exe and set.xls) 

The dropped payload and the clean XLS document are different sizes, different types of malware for trojans, but have the same names (some are renamed after creation), which suggests a template. The embedded clean XLS documents have different metadata - I guess those were downloaded from internet or stolen from different targets - some were created on the Kingsoft version of Office, different authors, etc.

- Non default encryption (RC4, Microsoft RSA SChannel Cryptographic Provider).

Default is "Office 97/2000 compatible", which I think is 40-bit RC4 encryption. The generator is probably not using Excel interface but has it's own implementation of the encryption for the VBA code.

- Targets do not seem to be related by their occupation

Targets are in different countries  - Japan, China, France and do not seem to be related by business or industry - human rights activists, businesses, politicians. This makes me think it is not the same group of attackers but it is just a generator purchased by/supplied to different groups attacking different targets. The same trojan types, C2 domains, and targets were covered on Contagio and other resources earlier.

Cridex Analysis using Volatility - by Andre' DiMino - samples and memory analysis resources

Andre' DiMino posted an excellent analysis of Cridex banking malware using Volatility on sempersecurus.blogspot.com and if you wish to repeat his steps or interested in this malware, I am posting the corresponding samples. Cridex is a complex financial trojan and is being distributed via spam messages (carrying exe files in zipped attachments) and Blackhole Exploit kit.
The messages have various themes - from UPS, Fedex, USPS to Groupon deals and "HP-scan" and other lures. Some message screenshots and corresponding malware are posted below.

If you are interested in memory analysis, please see the resource section of this post (links to the tools: Volatility, Mandiant Redline, memory dumps and other memory analysis done by Andre' and other researchers)

CVE-2012-1889 Security Update Analysis - Analysis video and presentation from High-Tech Bridge by Brian Mariani and Frédéric Bourla

Sorry for being away for such a long time - I was out of town for almost 2 weeks and came back just a couple of days ago. However, the blog is not dead and I am planning to post more stuff soon. There is Madi/Mahdi epidemic in progress, the exploit pack table needs urgent updates, and I have a quite a few samples accumulated that I need to post before they get old and boring. For now, if you are looking for anything specific, you can ask and I will check if I have them in the pending category.

Today, please enjoy the second part of CVE-2012-1889 analysis (CVE-2012-1889 Security Update Analysis - in video and PDF format ) sent to us by Brian Mariani and Frédéric Bourla from High-Tech Bridge www.htbridge.com ( High-Tech Bridge CVE Acreditation)

Flamer /SkyWiper Samples

August 13, 2012 - added an article by CERT Polska

If you didn't get enough of Flamer /SkyWiper yet, here are the samples donated by a reader. They are also available on various forums and Virustotal. Whether they are new or old, part of the "Olympic Games" or not, they are a fine example of a targeted attack.  Enjoy

 

CVE-2012-1889 Microsoft XML vulnerability - Samples and Analysis by Brian Mariani and Frédéric Bourla

Brian Mariani (High-Tech Bridge htbridge.com Geneva, Switzerland) sent a very detailed and helpful analysis of CVE 2012-1889 - "CVE-2012-1889 - Microsoft XML core services uninitialized memory vulnerability" presentation - by Brian Mariani and Frédéric Bourla, which I am publishing here.

Please download the slides in PDF format. The text of the presentation is also posted below. 

I am posting two samples - a metasploit poc file and a non-metasploit malicious code sample.

Medre.A - AutoCAD worm samples

         Medre.A  is a an AutoCAD worm, written in AutoLISP and is a very unusual piece of malware. It was

ACAD/Medre.A – 10000′s of AutoCAD files leaked in suspected industrial espionage and the corresponding whitepaper ACAD/Medre.A and ESET technical analysis is here ACAD/Medre.A Technical Analysis

          ESET reported Peru and neighboring countries as the target but I noticed that one of the samples' (MD5 25c7e10bb537b4265f6144f2cd7f6d95) original name is 未命名1 ( Unnamed 1), so I wonder if some targets/sources were Chinese speaking.

P.S. The samples were donated by an anonymous but the original source is someone from Malwarebytes forum and  I want to thank him/her (sorry don't know the name) for sharing. I hope they do not mind me posting them here.

RAT samples from Syrian Targeted attacks - Blackshades RAT, XTreme RAT, Dark Comet RAT used by Syrian Electronic Army

CitizenLab

The CitizenLab published their report of the Blackshades RAT used by Syrian Electronic Army against activists. No need repeat their excellent analysis but you wish to analyze Blackshades and other RAT that were used in the Syrian attacks, here are the samples for 

• Blackshades RAT - June 2012 Citizen Lab Syrian Activists Targeted with BlackShades Spy Software
• XTreme RAT - May 2012  F-Secure Targeted Attacks in Syria
•  Dark Comet RAT - April 2012 - TrendLabs by Nart Villenueve
  

Looks like they are changing their RAT monthly.

CVE-2012-1875 links and samples

CVE-2012-1875 Internet Explorer 8 exploit has been publicly available from various sources for a few days.
I am adding it here for reference.

For analysis info, see the AlienVault link below and the Metasploit module and demo.

P.S. In case you wonder, I have not stopped doing malware analysis, I still do,  but as as a longer term offline project combined with studying/reading. I pause what I am doing to share samples that come along and better be posted sooner - as is, as I do not want to wait until I write up something more expanded. Since most people prefer doing analysis on their own and I add reference links, I don't think it is a huge disappointment :)  ~ Mila

90 CVE-2012-0158 documents for testing and research.

While working on a project unrelated to Contagio, I collected a number of CVE-2012-0158 exploit documents (mostly RTF) via going through my own collection and what was shared (and publicly sharable) by Contagio readers. This post contains 90 files, mostly APT targeted but I did not analyze all and cannot guarantee that. These are CVE-2012-0158 exploits for files from April-June 2012. Some of them were already posted on Contagio.
The files inside the zip are named by SHA256_original file name.doc. I think I will be using SHA256 now for naming because it is more standard now and  it is much easier to auto generate VT links. The table below shows everything inside the archive with auto generated Virustotal links.
Some of them had Japanese and Chinese names that are now translated in English (with (JP) and (CN) in the name)


  Download all the files listed above (email if you need the password)
- thanks to all for sharing


Older similar collections for testing and research are here Version 4 April 2011 - 11,355+ Malicious documents - archive for signature testing and research


P.S. ok, these are actually cve-2010-3333. I will not remove them but fyi (thanks to xecure-lab.com)

1. ec8b9c68872257cec2552ac727348c09314658d9497085f8a19f58004476c9b8_info.doc
2. abbd1fa4dde11b94360338de8b5a2af7b09c6149ce1633797da825d5843cea7f_Criteria.doc
3. 125b8babb6ee4442efc75a5688c6bb5d0c71f8a685bcdff6b4043f3a829e65eb_Oded - Working.rtf

P.P.S.  and Paul Baccas from Sophos pointed out that these two are not true exploits but RTF delivery for Buzus (thanks).

1. 12d574de18f6820ba0d8d566152edb32386b86dde9f3ef7d1004c775b3b34dea_IMG_0056.doc
2. 300649da673828756cfda29f332d7b39f272c1dd308f0087162e9d58fbacac1f_300649da673828756cfda29f332d7b39f272c1dd308f0087162e9d58fbacac1f.rtf

CVE-2012-0158

The (1) ListView, (2) ListView2, (3) TreeView, and (4) TreeView2 ActiveX controls in MSCOMCTL.OCX in the Common Controls in Microsoft Office 2003 SP3, 2007 SP2 and SP3, and 2010 Gold and SP1; Office 2003 Web Components SP3; SQL Server 2000 SP4, 2005 SP4, and 2008 SP2, SP3, and R2; BizTalk Server 2002 SP1; Commerce Server 2002 SP4, 2007 SP2, and 2009 Gold and R2; Visual FoxPro 8.0 SP1 and 9.0 SP2; and Visual Basic 6.0 Runtime allow remote attackers to execute arbitrary code via a crafted (a) web site, (b) Office document, or (c) .rtf file that triggers "system state" corruption, as exploited in the wild in April 2012, aka "MSCOMCTL.OCX RCE Vulnerability." 

REPRINT of https://contagiodump.blogspot.com/2012/12/dec-2012-skynet-tor-botnet-trojantbot.html that was unpublished on May 27, 2025

Here are 7 binaries for Skynet Tor botnet aka Trojan.Tbot.  Claudio's analysis is wonderfully detailed, I just added  pcaps  and a few words in the description

Read more here:
Rapid7.  Claudio Guarnieri.  Skynet, a Tor-powered botnet straight from Reddit

May 31 - Tinba / Zusy - tiny banker trojan

Amazon.com 8" Gremlin

Tinba aka Zusy is an interesting tiny (18-20KB) banker trojan. It is not the smallest in use these days, Andromeda bot is 13 KB for resident and only 9 KB for non-resident versions. I got a few samples and hoped to come up with enough data for an IDS signature but they did a good emulation of the real systems, so it is not trivial. One thing very consistent is 13 byte initial RC4 encoded request.
I am posting details here, if you come up with a signature, please share with Emerging Threats or here.

Russian Cybercrime Presentation Slides 2012

Presented at a conference in May 2012
It is just pictures and not very useful without the narration. Email me if you need commentary for any of the slides
Download pdf 

See you in two weeks

Angus McIntyre

Greetings,
I will be traveling and will not have time for posts until June. If you sent any files to me recently and I did not post / did not reply, please accept my sincere apologies, it has been a busy period.

Please continue to share and upload files to  Contagio Community and Contagio Mobile dump where it will be available immediately to others via the main download link posted there.
I hope you all have a great end of spring and glorious summer.
Thank you
Mila

P.S. If you are looking for something that is not listed, feel free to email and ask, i might have it.

May 3 - CVE-2012-0779 World Uyghur Congress Invitation.doc

There are already quite a few samples of this recently patched exploit in the wild, including those targeting USA companies. This particular sample is targeting  Uyghur Congress, which is "an international organization aspiring to represent .. exiled Uyghur (Turkish ethnic group) people   both inside and outside of the Xinjiang Autonomous Region of the People's Republic of China." ~ Wikipedia. The text of the email cannot be translated with online translators, but judging by the content of the attachment, it is meant to look like an invitation for the World Uyghur Assembly .

More often than not, interesting samples come at the wrong time, when I cannot analyze them due to various reasons such as being busy with something else. I was planning to look at it this weekend but it did not happen, so here it CVE-2012-0779. Analyze it, write signatures, add detection to your filters. If you post an analysis, please send your link, I add. I will just post a few details about the file.

019 Speech.doc MacOS_X/MS09-027.A -exploit for MS Word on Snow Leopard OSX

bbtoystore.com

Someone uploaded it on Contagio Exchange the other day. Thank you for sharing.
Document language code is Arabic, which is kind of interesting. Targeting Tibet human rights activists.

Research: Microsoft An interesting case of Mac OSX malware
Research: Total Defense MS09-027 Target: Mac OSX & Tibetan NGOs

Xpaj -MBR rootkit sample - sample

News about Xpaj file infector brought this new donation of a sample, which i am posting now. I will add the network capture and sandbox report to augment the detailed analysis reports released by Bitdefender Xpaj - the bootkit edition and Symantec W32.Xpaj.B is a File Infector with a Vengeance
The file is meant to look like a crack of sorts for Big Air Stoked game



I accidentally overwrote this post with a blank one, many thanks to Lotta for sending the cached page and helping recreate it. It was not a long and detailed post but I wouldn't have time to redo it.

Operation Cleanup Japan (OCJP) by 0Day.jp May 3

Operation Cleanup Japan (OCJP)  ( 【報告】オペレーション「Cleanup Japan」 / #OCJPとは？is the project initiated by Hendrik Adrian to make the Japanese internet safer through exposure of badware sites and data, the shutdown of malicious sites and in helping the Japanese community learn from security professionals about how to recognize and prevent malware.

0DAY.JP <http://unixfreaxjp.blogspot.com/> is the project blog and it is in Japanese. We will link to his publications - via Google translation  and provide you with the relevant samples. This will be an ongoing post with future updates. Please support OCJP and enjoy.
P.S. Contact Hendrik if you have difficulty understanding Google translation of some words or need help with screenshots. IE and Chrome handle the translated text formatting better than Firefox. Except when indicated otherwise, I did not analyze these samples and might not be able to answer questions.

Red dots indicate the sample download links - same password on all by the scheme. Email me if you need it. With many thanks to Hendrik for his work and contributions.
DOWNLOAD ALL SAMPLES FROM THIS FOLDER OR FROM LINKS BELOW

 2012-04-18 Case 39 ◘ Zeus

PoisonIvy traffic

Screenshots for  https://docs.google.com/spreadsheet/ccc?key=0AjvsQV3iSLa1dDFfWHduQlA5THBRd081eFhsZThwUlE#gid=0

http://www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-detecting-apt-activity-with-network-traffic-analysis.pdf

Figure 4: 256-byte challenge request from the RSA PoisonIvy
sample

CVE-2012-0158 - South China Sea, Insider Information and other samples and analysis

Update April 20, 2012 - I added 8 more samples (now there are 12 posted), did not look at all of them yet but I think you may find them useful for developing signatures, etc

The TrendMicro report "CVE-2012-0158 – Now Being Used in More Tibetan-Themed Targeted Attack Campaigns" appeared in the news a few days ago, highlighting the beginning of a new wave of exploits using RTF as a carrier.

Researchers based in Asia noticed these malicious documents in Japan and Taiwan before they started showing up/targeting USA companies. Three documents donated a few days ago by someone from Asia were crafted to run only on  the Taiwanese version of Windows. The document I found today was uploaded to an online analysis service and it is for English Windows, it was named "inside information.doc" and drops a decoy document called 英文 , which means English. I could not get "Taiwanese" binaries run on English OS but this one executed successfully.

The vulnerability is due to an error in ActiveX control, in this case embedded in an RTF document. All documents I looked at are very similar, most likely there is a generator involved in making these. I have not seen any documents that would run without crashing the Word, so you need to carve out at least the first stage binary manually.

Many thanks to Brandon Dixon and Binjo for technical advice and inspiration :)

DarkMegi rootkit - sample (distributed via Blackhole)

Update April 20, 2012 Kimberly wrote an excellent analysis of this sample. Please go to

Stopmalvertising to read

This is a "DarkMegie" rootkit sample, kindly donated by Hendrik Adrian. Just like described in the McAfee article "Darkmegi: This is Not the Rootkit You’re Looking For" by Craig Schmugar, it is anything but quiet and stealthy. In fact, it makes so many system changes that it is hard to cover it all in a quick post.
Indeed, it drops the rootkit components in drivers with the incredible padding to 25MB and generates a lot of traffic. Unfortunately, I did not have time yet to sort out the mess and purpose of all files that this malware creates so I am just posting it here along with sandbox results for you to analyze. If you write a detailed analysis, please share,  I will link to.

Java OSX CVE-2012-0507, CVE-2011-3544 and Flashback.35/J sample

Dr. Web published BackDoor.Flashback.39 (Flashback.K-11th variant) epidemic chronology to augment their discovery of the Mac botnet "Doctor Web exposes 550 000 strong Mac botnet".  In general, the Flashback OSX epidemic started on or before August 2011 (F-Secure) with variants distributed as a fake Adobe Flash player. In January 2012, Intego reported Flashback.35/ J (the 10th) which was also distributed as a fake Flash download.

 I am posting here 3 Java exploits used to distribute Flashback trojans:

SAMPLE 1 JAVA CVE-2012-0507 is dated April 4, and appears to be distributing Flashback.35/J - as seen from the payload
SAMPLE 2 is java_signed_applet social engineering exploit (see Michael Schierl's comment below)
and 3 is JAVA CVE-2011-3544 and are dated February 2012.


I don't know which domains distributed these exploits (let me know if you do) but perhaps we are seeing the malware distribution scheme common for Windows-targeting exploit packs

OSX/Flashback.K sample + Mac OS malware study set (30+ older samples)

Update April 12, 2012  Added another binary sv.4 - with plist fle (edited to remove userid)


OSX Flashback malware has been in the news a lot after Kaspersky's announcement about 600,000 botnet "Kaspersky Lab Confirms Flashfake / Flashback Botnet Infected more than 600,000 Mac OS X Computers, Describes Ramifications and Remedies "

I got a sample tonight thanks to Tim Strazzere and I have not analyzed it but I want to try. Meanwhile, I am posting this sample and 30+ other Mac OS malware samples accumulated by Contagio and also from vxheavens collection (thank you all). They are dated by the year and provide a good historical set to study the evolution of Mac malware - I would start here: SANS Mac OS X Malware Analysis or check out Reverse Engineering Mac Defender (OS X) malware analysis for beginners

OSX Flashback URLs, Domains, etc

Dr.Web image

I have been tracking infections too and will be posting the domains I come across. I don't have the DGA script or list of domains to date, but even if I had, I think the best way to find them is via User Agent followed by the id:  I posting URLs and domains below and will add more soon.


Since it generates new domains every day, the full list would be much much longer but I will post those that I run across below in case it helps anyone. These below appear to be a variant of v.39/K

OSX/Flashback.O sample + some domains

 

1. A few hours after I posted the Flashback.K, someone anonymously uploaded Flashback.O sample (thank you very much!), which I am posting below. Like in the first case, it is a payload binary from a victim, not the downloader, which makes it impossible to install.  If you succeed or have a binary that installs, please share. I personally have not tried to run them yet, did not have a vm.

2. Matt Thompson from Unveillance emailed his comments about the Flackback.K sample please see the quote below.

3. Update April 11 - I will put domains and URLs in a separate post because they relate to various versions of Flashback, not v.40/O

Java CVE-2012-0507 / CVE-2011-3521 (see update below) samples

Examples of referrers blacklisted
by Blackhole exploit kit

Blackhole exploit kit was updated to version 1.2.3 on March 25 and now includes exploit Java CVE-2012-0507. Brian Krebs posted the news in his New Java Attack Rolled into Exploit Packs

In addition, Exploit pack known as "Incognito" (there are rumors that Incognito development stopped after v.2 in 2011 and this is something else) and  Eleonore added CVE-2011-3521(? likely, see comments below) as well.

I will add "Incognito" version when I can.

This is just a quick post to share samples (kindly offered by 0Day.jp Hendrik Adrian) and found in the wild, and links to analysis that was already done for these or similar samples.

Mar 2 CVE-2012-0754 SWF in DOC Iran's Oil and Nuclear Situation.doc

Update: March 9, 2012 - I added another sample donated by anonymous  - it is the same exploit but embedded in an Excel spreadsheet. The details about this sample are highlighted in yellow below.

This is a message from a targeted attack and quite possibly you already received a few on your own - there seem to be a new campaign underway using this new CVE-2012-0754 exploit. The vulnerability exists in Flash and is exploited when it tries to parse a crafted MP4 file. Successful exploitation allows an attacker to execute an arbitrary code.
In this case, the attachment comes as a Word document "Iran's Oil and Nuclear Situation.doc" (and it can come as any document), which contains flash instructing it to download and parse a malformed MP4. The dropped binary is a rather common trojan characterized by its traffic. When it comes to AV names, I don't know whether Graftor or Yayih.A are meaningful or some generic names but maybe you have your own name for it.  

Welcome to Contagio Exchange - community malware dump

http://contagioexchange.blogspot.com/

Greetings,
Contagio Exchange is meant to be a communal malware collection. Contagio mobile dump has been very successful and useful because researchers can upload their samples and download them without waiting for me to analyze or post it - directly from the mediafire box.

Whenever I have time, I will moderate and post descriptions for the files and individual download links (in addition to the main dropbox link) in the same format you see on the  mobile malware dump.

This collection is meant to be a shared library of malware samples, not a repository of every type and sample in existence. I would like it to have current and useful samples for everyone to analyze and play with. Links for search and download are in the right hand column.


This collection is not meant to be a

•  replacement for Contagio malware dump, it will continue to operate as usual.
•  mega catchall dump of everything you can download from Malwaredomainlist,   Cleanmx, or offensivecomputing.net
•  competitor to the above or any similar collections and sites
•  mess of zipped and unzipped generic and "lord knows what it is" files
•  repository of every sample in existence
•  danger to society

For this collection to succeed, please follow these simple rules:

1. Zip all and every file with the password 'infected' before uploading. Zip is better than rar for consistency.
2. Read #1 again - it is very important to prevent the mediafire dropbox from turning into a hazard
3. Add your name to the description (if you want a credit), description itself, links to research or sandbox results to explain what it is.  You can add a text file inside the package called description.txt or use the comment box during the upload. Please do not upload mystery files.
4. Name zip files like this "virusname_md5.zip" or include MD5 in the name of the zip - if possible
5. If you are not sure what it is and / or the detection is generic, please do not dump it into a sorted main exchange box but use U.F.O. - Unidentified Flying Object box so that others knew what to expect

Mediafire dropbox information

• This is a paid and long standing mediafire account with unlimited storage and more than enough bandwidth to support it. 
• Your samples are not held hostage as you can download them and store on your system each time or on a schedule. If there is ever any change to this storage, I will give enough warning or ways to get them.   
• All links are direct, no ads
• Dropbox works on all OS but best on Firefox and Chrome. I did not try it on Safari and it has issues on IE and Palemoon. If you have a problem with using it, you can email the samples (rename the file extension and double zip exe files) and indicate it is for the exchange.
• As an added benefit, you can use the dropbox for malware exchange with anyone - if you don't mind your sample to become public. Once you upload, go to the download link on top of the upload box and click on a round gear next to the sample and select 'share'. It will generate a direct link you can post or email.

P.S. I don't financially benefit from the dropbox downloads (in fact, it is the opposite) , posts, or malware samples. It is for the sake of fun and education.

Feb 9 CVE-2011-1980 MSOffice DLL Loading vulnerability + Trojan Nflog

fputlsat.dll

On February 9, 2012 Symantec disclosed that the previously patched MS Office insecure library loading vulnerability was exploited in the wild. DLL loading vulnerabilities were used in targeted attacks at least with two other exploits in 2011 and they did not reach epidemic proportions like it happend with CVE-2010-3333 RTF or some of the Adobe PDF exploits. I refer to
Contagio: Sept. 23 CVE-2011-1991 type (1) deskpan.dll Windows components DLL loading vulnerability
and
Contagio: Apr 13 CVE-2011-2100 PDF - Adobe DLL Loading Vulnerability - Agenda.7z

DLL search order hijacking exploits had and will have many new reincarnations because of the DLL loading preference order - Current Working Directory is preferred for most DLL files. You can read more about the root of these problems (not necessarily related to MS Office but in general) in M-unition: DLL Search Order Hijacking Revisited by Nick Harbour

As described in the Symantec article, fputlsat.dll must be present in the same directory as the Word document in order to be activated by the ActiveX control embedded in the Word document. The payload of this sample is a backdoor trojan Nflog. 

TDL4 - Purple Haze (Pihar) Variant - sample and analysis

Lately things just don't seem the same
Actin' funny, but I don't know why
'Scuse me....... while I kiss the sky
 Jimi Hendrix "Purple Haze"

I recently ran into an interesting piece of malware that was downloaded on a victim's computer. I thought it was TDL/TDSS or maybe a new version of it as it had same components as TDL4 bootkit with a functionality of a mass scale PPC (pay-per-click) fraud. TDL had this functionality too and it is most likely spread by the same Russian-speaking gangs using the Blackhole exploit kit. It did not have the same type of config file that you may find in TDL4 (and first I could not find it at all). I call it "Purple Haze" thanks to the strings found in the code.

I shared it with Alexander Matrosov from ESET. He and Eugene Rodionov  analyzed it and posted an article on the ESET blog: "TDL4 reloaded: Purple Haze all in my brain" (edited by David Harley)
Eset also updated the removal tool for this variant - direct download link: OlmarikTDL4 remover

Blackhole Ramnit - samples and analysis

Ramnit - a Zeus-like trojan/worm/file infector with rootkit capabilities has been in the wild for a long time but recently made news because Seculert reported about a financial variant of this malware aimed at stealing Facebook credentials.

While I did not see any Facebook related activity in my samples, I am posting them anyway for your research as their functionality is the same.

The samples I have are being spread not via Facebook but via Blackhole exploit kit, which is a very effective method. Blackhole exploit kit was associated with the spread of ZeuS, Spyeye, and it is not surprising that Ramnit is being spread in the same manner by the same groups. The group of command and control servers that I researched is associated with pharma spam and "Canadian" online pharmacies.