LNK_DORKBOT.TV

August 12, 2013
 Analysis by: Joie Salvio
 ALIASES:

Trojan.WinLNK.Runner.bl (Kaspersky), Win32/Dorkbot.D worm (ESET), W32/AutoRun-BQJ (Sophos), Trojan horse BackDoor.Dorkbot.A (AVG)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

1,501 bytes

File Type:

LNK

Initial Samples Received Date:

07 Aug 2013

Arrival Details

This Trojan may be dropped by the following malware:

  • WORM_DORKBOT family

NOTES:

This file is a component of WORM_DORKBOT malware family.

It is a shortcut file with a folder icon that uses the following command line to execute its malware component:

%windir%\system32\cmd.exe /c "start %cd%RECYCLER\{random filename}.exe &&%windir%\explorer.exe %cd%{varying folder name}

This command line tries to execute its malware component file located at {drive letter}:\RECYCLER\{random filename}.exe.

It then tries to disguise itself as a normal folder by opening a folder with a varying filename.