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W97M_DLOAD.EM

September 04, 2014
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

TrojanDownloader:W97M/Ledod.E (Microsoft); W97M/Downloader.a (McAfee); MO97:Downloader-AP (Avast); HEUR:Trojan-Downloader.Script.Generic (Kaspersky); W97M/Downloader (AhnLab-V3)

 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 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:

68,096 bytes

File Type:

DOC, DOCX

Initial Samples Received Date:

30 Jun 2014

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.

Download Routine

This Trojan saves the files it downloads using the following names:

  • %Application Data%\iexplore.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}1.{BLOCKED}txex.com/uploads/{BLOCKED}OVhG_6VwiL74T-JSQ3388Gnm6wbfCl8JtIIT33qoKSxVwV3mZlGjjNKZK6k5JNpNN84kUwd9uvNWFjUphtuOlrQZ49RLV