Analysis by: Rhena Inocencio
 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:

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

This worm may be downloaded by other malware/grayware from remote sites. It may be downloaded from remote sites by other malware.

  TECHNICAL DETAILS

File Size: Varies
File Type: Other
Initial Samples Received Date: 10 Apr 2013

Arrival Details

This worm may be downloaded by the following malware/grayware from remote sites:

  • http://{BLOCKED}r.dl.{BLOCKED}forge.net/project/stubpe/a/zwz

It may be downloaded from remote site(s) by the following malware:

  • TROJ_GAMARUE.SM

NOTES:

This Trojan is an encrypted WORM_GAMARUE.DA malware

This malware is downloaded, decrypted and executed by TROJ_GAMARUE.SM

The decrypted copy of this malware is saved as follows:

  • %System Root%\Temp\TrustedInstaller.exe

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.848.05
FIRST VSAPI PATTERN DATE: 10 Apr 2013
VSAPI OPR PATTERN File: 9.849.00
VSAPI OPR PATTERN Date: 11 Apr 2013

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

Remove malware/grayware files that dropped/downloaded WORM_ENCMARUE.DA

     
    • TROJ_GAMARUE.SM

Step 3

Remove malware/grayware files dropped/downloaded by WORM_ENCMARUE.DA

    • WORM_GAMARUE.DA

Step 4

Scan your computer with your Trend Micro product to delete files detected as WORM_ENCMARUE.DA. 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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