Analysis by: Roland Marco Dela Paz
 Modified by: Christopher Daniel So
 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 may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 453 bytes
Memory Resident: No
Initial Samples Received Date: 09 Mar 2011

Arrival Details

This Trojan may be dropped by the following malware:

  • WORM_OTORUN.ASH
  • WORM_OTORUN.KR

NOTES:

This Trojan is a shortcut file (.LNK) that is used as an autostart component of the main malware.

It is usually dropped together with the main malware's copy. Once executed, it executes the main malware. Thus, malicious routines of the main malware are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 7.889.00
VSAPI OPR PATTERN Date: 09 Mar 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

Remove malware/grayware files that dropped/downloaded LNK_OTORUN.SM

Step 3

Scan your computer with your Trend Micro product to delete files detected as LNK_OTORUN.SM. 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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