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Virus:TR/Agent.aeim
Date discovered:04/01/2011
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:49.242 Bytes
MD5 checksum:385323ccdc790b3302b32120ef1dbe9a
VDF version:7.10.07.145
IVDF version:7.11.01.20 - Tuesday, January 4, 2011

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Mcafee: W32/DKR.worm
   •  Kaspersky: Trojan.Win32.Agent.aeim
   •  Sophos: W32/LCJump-A
   •  Bitdefender: Trojan.Agent.AIQ
   •  Panda: W32/Autorun.APB
   •  GData: Trojan.Agent.AIQ


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


Side effects:
   • Drops malicious files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following locations:
   • %WINDIR%\SVCHOST.EXE
   • %drive%\RavMon.exe



The following files are created:

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

%WINDIR%\SVCHOST.INI
%WINDIR%\MDM.EXE Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.abt




It tries to execute the following files:

– Filename:
   • %WINDIR%\SVCHOST.EXE


– Filename:
   • %WINDIR%\MDM.EXE

 Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "SVCHOST"="%WINDIR%\MDM.EXE"

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   • CheckedValue



The following registry key is changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:0x00000002

 Backdoor Contact server:
The following:
   • http://cha**********.cn/task.asp?mac=%character string%


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


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 Wednesday, April 6, 2011
Description updated by Petre Galan on Wednesday, April 6, 2011

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