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Date discovered:13/06/2006
In the wild:No
Reported Infections:Low
Distribution Potential:Medium to high
Damage Potential:Medium
Static file:Yes
File size:81.920 Bytes
MD5 checksum:26799179FAA5FFEB74AAD484DE3F2A3C
VDF version:
IVDF version: - Wednesday, June 14, 2006

 General Methods of propagation:
   • Autorun feature
   • Messenger

   •  TrendMicro: WORM_OTORUN.DGD
   •  Sophos: W32/VB-FIY
   •  Microsoft: Trojan:Win32/VB.AHA

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7

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

 Files It copies itself to the following location:
   • %TEMPDIR%\winlogon.exe

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Service"="%TEMPDIR%\winlogon.exe"

The following registry keys are added:

– [HKLM\SOFTWARE\Microsoft\Security Center]
   • "UACDisableNotify"=dword:00000000

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]
   • "EnableLUA"=dword:00000000

 File details Programming language:
The malware program was written in Visual Basic.

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

Description inserted by Andrei Ilie on Wednesday, September 21, 2011
Description updated by Andrei Ilie on Wednesday, September 21, 2011

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