Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

This is the Trend Micro detection for specially crafted .LNK files that are used to execute malicious files once this shortcut is accessed.Once the user accesses this shortcut, it executes a file detected by Trend Micro as BKDR_POISON.HBAH.

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 1,381 bytes
File Type: LNK
Memory Resident: No
Initial Samples Received Date: 26 Mar 2012

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be dropped by other malware.

NOTES:
This is the Trend Micro detection for specially crafted .LNK files that are used to execute malicious files once this shortcut is accessed. Once the user accesses this shortcut, it executes the following file:

  • Thumbs.db - detected by Trend Micro as BKDR_POISON.HBAH

As a result, the routines of the main component file is exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.866.02
FIRST VSAPI PATTERN DATE: 26 Mar 2012
VSAPI OPR PATTERN File: 8.867.00
VSAPI OPR PATTERN Date: 27 Mar 2012

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 files dropped/downloaded by LNK_OTORUN.HBA

    BKDR_POISON.HBAH

Step 3

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