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W2KM_DRIDEX.DAM

February 11, 2016
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

W97M.Downloader (Symantec); Troj/DocDl-ALE (Sophos); TrojanDownloader:O97M/Adnel (Microsoft); W97M/Downloader.art (McAfee); Trojan-Downloader.MSWord.Agent.wd (Kaspersky); VBA/TrojanDownloader.Agent.AKN (ESET-NOD32);

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Via email

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It does not have any propagation routine.

It does not have any backdoor routine.

As of this writing, the said sites are inaccessible.

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size:

128,512 bytes

File Type:

DOC

Memory Resident:

No

Initial Samples Received Date:

30 Nov 2015

Payload:

Downloads files

Arrival Details

This Trojan arrives as an attachment to the following email messages spammed by other malware/grayware or malicious users:

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

As of this writing, the said sites are inaccessible.

Other Details

This is the Trend Micro detection for:

  • Damaged variants of the W2KM_DRIDEX family
  • Samples detected by this pattern contains code errors, thus they fail to exhibit their intended routines
  • Microsoft Word documents that are compromised through the insertion of a malicious macro

NOTES:
The intention of the malware author is to download and execute a malicious file.

  SOLUTION

Minimum Scan Engine:

9.800

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]

Step 3

Scan your computer with your Trend Micro product to delete files detected as W2KM_DRIDEX.DAM. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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