Virus:TR/Agent.56320.16
Date discovered:13/10/2009
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:56.320 Bytes
MD5 checksum:66dc85ad06e4595588395b2300762660
IVDF version:7.01.06.106 - Tuesday, October 13, 2009

 General Aliases:
   •  Mcafee: W32/Koobface.worm.gen.o
   •  Panda: W32/Koobface.GN.worm
   •  Eset: Win32/Koobface.NCF
   •  Bitdefender: Trojan.Generic.IS.615453


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\freddy69.exe



It deletes the initially executed copy of itself.



It deletes the following files:
   • %malware execution directory%\sd.dat
   • %WINDIR%\dxxdv34567.bat
   • %malware execution directory%\df1a245s4_1000.exe
   • C:\3.reg



The following files are created:

– %WINDIR%\bk23567.dat
– %WINDIR%\freddy101.exe Further investigation pointed out that this file is malware, too.
– %WINDIR%\dxxdv34567.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.
– %HOME%\Local Settings\Temporary Internet Files\Content.IE5\CXA7GX23\fb[1].101.exe Further investigation pointed out that this file is malware, too.



It tries to download some files:

– The locations are the following:
   • http://www.bloomfieldlivestockmarket.com/**********/?action=fbgen&v=69
   • http://iq-tech.biz/**********/?action=fbgen&mode=s&age=32&a=544453496&v=101&crc=669&ie=6.0.2800.1106
   • http://doratheexplorertoys.info/**********/?action=fbgen&v=101&crc=669
   • http://www.getconnected.be/**********/?action=fbgen&v=69
   • http://krukvaxter.tazzeli.se/**********/?action=fbgen&v=69
   • http://www.agapebowling.com/**********/?action=fbgen&v=101&crc=669
   • http://www.oneofakindsxm.com/**********/?getexe=fb.101.exe
   • http://rtrans.spb.ru/**********/?action=fbgen&v=69
   • http://genesiskdmparts.com/**********/?action=fbgen&v=69
   • http://iq-tech.biz/**********/?action=fbgen&v=101&crc=669
   • http://firmafrugtforeningen.dk/**********/?action=fbgen&v=101&crc=669
   • http://hadsund-jagt.dk/**********/?action=fbgen&v=101&crc=669
   • http://qatar-business-guide.net/**********/?action=fbgen&a=544453496&v=69&ie=6.0.2800.1106
   • http://www.svensmits.be/**********/?action=fbgen&v=69
   • http://qatar-business-guide.net/**********/?action=fbgen&v=69
Further investigation pointed out that this file is malware, too.

 Registry The values of the following registry key are removed:

–  [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Windows\CurrentVersion\Internet Settings]
   • AutoConfigURL
   • ProxyOverride
   • ProxyServer



The following registry key is added:

– [HKLM\SOFTWARE\Classes\MIME\Database\Content Type\
   application/xhtml+xml]
   • "CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
   • "Encoding"=hex:08,00,00,00
   • "Extension"=".xml"



The following registry keys are changed:

– [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:0x00000001
   • "ProxyEnable"=dword:0x00000000

– [HKLM\SYSTEM\ControlSet001\Hardware Profiles\0001\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:0x00000000

 Injection – It injects itself as a thread into a process.

    Process name:
   • regedit.exe


 Miscellaneous  Checks for an internet connection by contacting the following web site:
   • http://www.google.com


String:
Furthermore it contains the following strings:
   • http://messaging.myspace.com/index.cfm?fuseaction=mail.sentboxV3&type=Sent
   • http://profileedit.myspace.com/index.cfm?fuseaction=profile.blurbs
   • http://profileedit.myspace.com/index.cfm?fuseaction=profile.interests
   • http://profileedit.myspace.com/index.cfm?fuseaction=profile.lifestyle
   • http://profileedit.myspace.com/index.cfm?fuseaction=profile.schools
   • http://profileedit.myspace.com/index.cfm?fuseaction=profile.companies
   • http://profileedit.myspace.com/index.cfm?fuseaction=accountSettings.contactInfo
   • myspace.com/index.cfm?fuseaction=profile.basic
   • document.getElementById("hsmDoneBtn").fireEvent("onmousedown", evt);

 File details Programming language:
 The malware program was written in MS Visual C++.

Description inserted by Petre Galan on Tuesday, February 23, 2010
Description updated by Petre Galan on Tuesday, February 23, 2010

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