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TROJ_PIDIEF.TEL

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Trojan takes advantage of certain software vulnerabilities to drop malicious files. Upon successfully exploiting the vulnerability, it drops a malicious file detected as TROJ_MALEX.AV.

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.

  TECHNICAL DETAILS

File Size:

222,903 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

15 Feb 2011

Payload:

Drops files

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.

Installation

This Trojan drops the following non-malicious files:

  • %User Temp%\ap summit flyer.pdf

(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.)

Dropping Routine

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

  • CVE-2008-2992

    Upon successfully exploiting the said vulnerability, this malware drops the following malicious file:

    • %User Temp%\{random number}.tmp - detected as TROJ_MALEX.AV

(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.)

Other Details

For more information on the aforementioned vulnerabilities, please see the following pages:

  • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2992

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

currently processing

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.TEL

    TROJ_MALEX.AV

Step 3

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%\ap summit flyer.pdf

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.TEL. 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 5

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.  http://www.adobe.com/support/security/bulletins/apsb08-19.html


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