Analysis by: Karl Dominguez
 THREAT SUBTYPE:

Premium Service Abuser

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size: Varies
File Type: SIS
Memory Resident: Yes
Initial Samples Received Date: 26 Jan 2011

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

Other Details

This Trojan does the following:

  • It is capable of sending SMS messages to contacts of the affected phone. The message contains a link where a copy of this malware can be downloaded:
    • http://{BLOCKED}.{BLOCKED}.138.234

    As of this writing, the said site is inaccessible

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.793.00
VSAPI OPR PATTERN Date: 26 Jan 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to delete files detected as SYMBOS_MEROGO.A. 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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