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Thursday, April 12, 2012

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



Malware information

F-Secure removal procedure 

Flashback checker (check if your computer/vm is infected)

ET signature

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN OSX/Flashback.K/I User-Agent"; flow:established,to_server; content:" WOW64|3b| rv|3a|9.0.1|3b| sv|3a|"; http_header; content:" id|3a|"; http_header; within:6; reference:url,f-secure.com/v-descs/trojan-downloader_osx_flashback_k.shtml; reference:url,vms.drweb.com/virus/?i=1816029; reference:url,f-secure.com/v-descs/trojan-downloader_osx_flashback_i.shtml; classtype:trojan-activity; sid:2014534; rev:3;)

Download

Please email me if you need the password scheme

http://4.bp.blogspot.com/_xQabPlo6k5s/S5D5RBVdPqI/AAAAAAAAAuo/Dc7Qbe4zllc/s320/bag6.JPGDownload OSX/Flashback.K C898CDE665DB8D62FEA634C28E284139
Download recent OSX Contagio samples
Download the historical MacOS malware set

Update April 12, 2012  Download  5616687FAC5D040AE65CB1B08717A6AA

File information

Update April 12, 2012
com.sun.jsched.plist  (from ~/Library/LaunchAgents/com.sun.jsched.plist
 Plist file contents (user name replaced with USERNAME)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict><key>Label</key><string>com.sun.jsched</string><key>ProgramArguments</key><array><string>/Users/USERNAME/.jsched</string></array><key>RunAtLoad</key><true/><key>StartInterval</key><integer>4212</integer><key>StandardErrorPath</key><string>/dev/null</string><key>StandardOutPath</key><string>/dev/null</string></dict></plist>

.jsched    from Users/USERNAME/.jsched. If you must have UUID, email me.
Size: 59844
MD5:  5616687FAC5D040AE65CB1B08717A6AA 

 DOMAINS and UA from 5616687FAC5D040AE65CB1B08717A6AA 

2012-Apr-10 12:38:16
client: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1; sv:4; id:4341D6B3-97DC-58F3-A696-
D8AAE9EC1A08) Gecko/20100101 Firefox/9.0.1 (uuid changed)

174.129.221.183
rfffnahfiywyd.com
rfffnahfiywyd.net
rfffnahfiywyd.info
rfffnahfiywyd.in
rfffnahfiywyd.kz
cvsqsmuiaaiyh.com
cvsqsmuiaaiyh.net
cvsqsmuiaaiyh.info
cvsqsmuiaaiyh.in
cvsqsmuiaaiyh.kz

scfoijdccqtmj.com
scfoijdccqtmj.net
scfoijdccqtmj.info
scfoijdccqtmj.in
scfoijdccqtmj.kz

End of Update April 12, 2012 

============================
OSX/Flashback.K
Size: 59844
MD5:  C898CDE665DB8D62FEA634C28E284139

Other malware recent
2011 Olyx Backdoor 93a9b55bb66d0ff80676232818d5952f - Contagio
2011 MacDefender fb6f092624d48fe9a496c50f615b424b27cf3515 
and MacProtector 1f8e9cd3f0717a85b96f350e4f4a539a - Contagio
2010 OSX/Boonana.A facebook trojan  7a04e9185daf9551edd90e7bff2daa8e and 2533F62C321117C46D6DF6122C3009BD - Contagio

Historical MacOS malware set

        1992        Virus.Mac.Code252.a        F446DEB312A955713B97DB2169165CF5
        1992        Virus.Mac.Init1984.a        EDD3A891DA59A0A3CD8E880F175DAFCD
        1994        Virus.Mac.Init29.a        66CE0EAF0175D9113CE1D06FCD459FD0
        2000        Virus.Mac.Init9403.a        F8DC251414AE7B61535DAE3E740BE9EC
        2000        Virus.Mac.Mdef.a            A7A6389FC1B557A3271984B543E62419
        2000        Virus.Mac.Mdef.c        CA9ADCA2E776C2B814D775F1F495665F
        2000        Virus.Mac.Mdef.d        D934045683902939454B8B73DE839241
        2000        Virus.Mac.Mdef.e        92305C6780AB3286AEC6660652C29A26
        2000        Virus.Mac.Nvir.a        D80E0F45387447504435ADD8572FECEC
        2000        Virus.Mac.Nvir.b        36A0E2A4C6A3166FC017A0CDA942157C
        2000        Virus.Mac.Wdef.a            0B1565AE48EA70FC620308A357F261DA
        2000        Virus.Mac.Wdef.b        9A223E402D4121E8E421ABCA0BC05820
        2000        Virus.Mac.Zuc.a        1425EB1FDEE4B1835E0AC2AE031501EB
        2000        Virus.Mac.Zuc.b        9B750CFE7B7730B30DC4A93A56A2D4F0
        2000        Virus.Mac.Zuc.c        4B4A8F711957BB37A2747CA7036189E7
        2001        Virus.Mac.Simpsons.a        3EDF7343D6A5DCD6AE748482B90386AA
        2002        Virus.Mac.Init666.a        14BECD6024A447F0B3A927E968F11127
        2005        irus.Mac.Sevendust.b        1AF001A295BDDECE107BEA633A4110A8
        2005        Virus.Mac.Cdef.a        E256064B76351A3C37937843EC439F61
        2005        Virus.Mac.ChinaTalk.a        A68E971FCD602161701E3E139A3B1BC1
        2005        Virus.Mac.Code1.a        EE86680A66BD953E309CD5A461010D29
        2005        Virus.Mac.MacMag.a        329E85AF8A6D719AA088E8195021A0B8
        2005        Virus.Mac.MacMag.b        29A126B98C43AD3FB96659719E8479CE
        2005        Virus.Mac.Scores.a        F96F50C90C591BF45B96E9EB40ECCA44
        2005        Virus.Mac.Sevendust.a        18B3A5437E6E6448AC80D10139AEE099
        2005        Virus.Mac.Sevendust.d        860F251EE934B10EACD5559E6BAD2285
        2005        Virus.Mac.Sevendust.e       9898A5F12B06BEB87CA18C61309FA36A
        2005        Virus.Mac.T4.a            ED9008767028E449AB8938C02D2E3EF8
        2007        Worm.OSX.Niqtana.a        2C25908053ECC1474D2FB2C530EA5CFA
        2008        Backdoor.Mac.Hovdy.b      FED713CAC7012D25F60B236E6DDCF513
        2008        Trojan-PSW.OSX.Corpref.a        DF464DE7A6EB04FEB95504D74F7505DA
        2009        Trojan-Downloader.OSX.Jahlav.a  FB79A75A6152EF47BBF88AE8544545CC

        200x        Exploit.Mac.Small.c        3DC01743FB42E917E9F9EDE5009F10CD
        200x        Virus.Mac.Flag.a            E3F82C900CD71C070CAAF0B09EA02900
        200x        Virus.Mac.Anti.a        62CC37E947C425A3BB2CB15544D2EF9E

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