TR/Agent.Abt.3 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Agent.Abt.3
Date discovered:	11/01/2007
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low to medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	385323ccdc790B3302b32120ef1dbe9a Bytes
MD5 checksum:	49.242
IVDF version:	6.37.00.140 - Thu, 11 Jan 2007 08:10 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Mcafee: W32/DKR.worm
   • Kaspersky: Trojan.Win32.Agent.abt
   • F-Secure: Trojan.Win32.Agent.abt
   • Sophos: W32/LCJump-A
   • Eset: Win32/Agent.NAV worm
   • Bitdefender: Trojan.Agent.AIQ

Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops a file
   • Drops malicious files
   • Registry modification

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

The following files are created:

– %WINDIR%\SVCHOST.INI This is a non malicious text file with the following content:
   • [INFO]
     version=104
     win=ARWVJUJMPIMFWCCS

– C:\AutoRun.inf Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.Abt.34

– %WINDIR%\MDM.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.AEI.1

Registry The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   Old value:
   • "CheckedValue"=dword:00000001
   New value:
   • "CheckedValue"="0"

– [HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   Old value:
   • "Hidden"=dword:00000001
   New value:
   • "Hidden"=dword:00000002

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 the following runtime packer:
• NPack

See a brief description here.

Description inserted by Thomas Wegele on Wed, 07 May 2008 10:41 (GMT+1)
Description updated by Thomas Wegele on Wed, 07 May 2008 11:03 (GMT+1)

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