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W2KM_DRIDEX.YYSRO

February 29, 2016
 Analysis by: Rhena Inocencio
 Modified by: Francis Xavier Antazo
 ALIASES:

Trojan:O97M/Madeba.A!det (Microsoft); VBA/TrojanDownloader.Agent.ATX (ESET); Trojan-Downloader.MSWord.Agent.abd (Kaspersky); W97M.Downloader (Symantec); VBA:Downloader-ASU [Trj] (Avast);

 PLATFORM:

Windows

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

  • 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:

18949 bytes

File Type:

DOC

Memory Resident:

Yes

Initial Samples Received Date:

24 Feb 2016

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 and executes the following files:

  • %User Temp%\bvdsfsdg.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://svrapp02.{BLOCKED}iewarehouse.info/fecha/esberando.php