Analysis by: Karl Dominguez
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type:

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as attachment to mass-mailed email messages. It may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size: Varies
File Type: PDF
Memory Resident: No
Initial Samples Received Date: 11 Apr 2010
Payload: Downloads files

Arrival Details

This Trojan arrives as attachment to mass-mailed email messages.

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

Download Routine

This Trojan takes advantage of the following software vulnerabilities to download possibly malicious files:

Other Details

This Trojan does the following:

  • Once the said vulnerabilities are exploited, it connects to the following sites to download files:
    http://{BLOCKED}0.1/denwer/d/0.php?& - inaccessible
    http://{BLOCKED}z.co.cc/ryhT4yJoTnKRv2A2Si32olV1rBxaMDa6?p&x=i9.3&&s=newp& - detected as TROJ_BAMTAL.SMIA

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.517.00
VSAPI OPR PATTERN Date: 06 Oct 2010

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 TROJ_PIDIEF.WT

     TROJ_BAMTAL.SMIA

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.WT. 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.

Step 4

Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.


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