Analysis by: Rhena Inocencio
ALIASES:

TrojanDownloader:HTML/Adodb.gen!A (Microsoft), Trojan.Acad.Dwgun.d (Kaspersky), Trojan:ACAD/Agent.DPWZ (FSecure), AL/Bursted-Q (Sophos)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 9,922 bytes
File Type: Other
Initial Samples Received Date: 27 Sep 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %Windows%\DivX.fin
  • %Program Files%\AutoCAD\Fonts\isomianyi.shx
  • {malware path}\acad.fas

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\KenFiles

Download Routine

This Trojan accesses the following websites to download files:

  • http://www.{BLOCKED}s.com/return/gxcx.shx