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Virus:TR/Agent.CO.3
Date discovered:19/04/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:94.208 Bytes
MD5 checksum:1621aa2ba27ebc2c3823f3113ff3a836
IVDF version:7.11.06.174 - Tuesday, April 19, 2011

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Kaspersky: Trojan.Win32.VBKrypt.ctoy
   •  Bitdefender: Trojan.VBS.Agent.CO
   •  GData: Trojan.VBS.Agent.CO


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


Side effects:
   • Drops malicious files
   • Registry modification
   • Steals information

 Files It copies itself to the following locations:
   • %drive%\htPOPyPO.exe
   • %TEMPDIR%\htPOPyPO.exe



It deletes the initially executed copy of itself.



The following file is created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

 Registry The following registry key is added:

– [HKLM\Software\Microsoft\Active Setup\Installed Components\
   {254F4E25-A65F-2764-0003-070806050704}]
   • "StubPath"="%TEMPDIR%\htPOPyPO.exe"

 Backdoor Contact server:
All of the following:
   • https://obituary2.redirectme.net/**********?id=%character string%&co=%character string%&us=%character string%&os=%character string%&vr=%character string%&av=%character string%&dt
   • https://chavez21.effers.com/**********?id=%character string%&co=%character string%&us=%character string%&os=%character string%&vr=%character string%&av=%character string%&dt
   • https://yorst.linkpc.net/**********?id=%character string%&co=%character string%&us=%character string%&os=%character string%&vr=%character string%&av=%character string%&dt
   • https://johnylee.strangled.net/**********?id=%character string%&co=%character string%&us=%character string%&os=%character string%&vr=%character string%&av=%character string%&dt


 Stealing – Recorded passwords used by the AutoComplete function

– Passwords from the following programs:
   • Mozilla Firefox
   • Internet Explorer

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

    Process name:
   • explorer.exe


 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Thursday, July 14, 2011
Description updated by Petre Galan on Thursday, July 14, 2011

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