Analysis by: Christopher Daniel So
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  TECHNICAL DETAILS

File Size: 23,552 bytes
File Type: EXE
File Compression: UPX
Memory Resident: No
Initial Samples Received Date: 03 Oct 2010

Autostart Technique

This Trojan enables its automatic execution at every system startup by dropping the following copies of itself into the Windows Common Startup folder:

  • msupd81452.exe

Other Details

This Trojan drops the following file(s)/component(s):

  • %User Temp%\_vdmstmsnd_.dat

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.512.04
VSAPI PATTERN Date: 04 Oct 2010
VSAPI PATTERN Date: 10/4/2010 12:00:00 AM

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

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result. %User Temp%\_vdmstmsnd_.dat

Step 3

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