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TROJ_PIDIEF.WBG

October 08, 2012
 Analysis by: JasperM
 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

  OVERVIEW


This Trojan may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

152,274 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

16 Aug 2010

Payload:

Drops files

Arrival Details

This Trojan may be dropped by other malware.

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

Autostart Technique

This Trojan drops the following files:

  • %User Temp%\alg.exe - detected as BKDR_AGENT.JAAK
  • %User Temp%\EEEAr_,O.pdf - non malicious

(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:

  • Adobe Reader and Acrobat util.printf() JavaScript function stack buffer overflow

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

Other Details

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

  • http://www.kb.cert.org/vuls/id/593409
  • http://www.adobe.com/support/security/bulletins/apsb08-19.html

  SOLUTION

Minimum Scan Engine:

8.9

VSAPI OPR PATTERN File:

7.389.80

VSAPI OPR PATTERN Date:

16 Aug 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.WBG

    BKDR_AGENT.JAAK

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%\EEEAr_,O.pdf

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.WBG. 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 this security patch 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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