Analysis by: Karl Dominguez
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as a component bundled with malware/grayware packages.

  TECHNICAL DETAILS

File Size: 34,304 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 12 Apr 2011

Arrival Details

This Trojan arrives as a component bundled with malware/grayware packages.

Installation

This Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:

  • 820101230

It terminates itself if it finds the following processes in the affected system's memory:

  • RsAgent.exe

Process Termination

This Trojan terminates the following processes if found running in the affected system's memory:

  • wscript.exe

Other Details

This Trojan requires the following additional components to properly run:

  • {malware path}\rstimgr.dll
  • {malware path}\rstimgr.inf

  SOLUTION

Minimum Scan Engine: 8.900

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

Identify and terminate files detected as TROJ_AGENT.SCMA

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT.SCMA. 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.


Did this description help? Tell us how we did.