Analysis by: Erika Bianca Mendoza
 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 is a malicious .PDF document that exploits a certain vulnerability in Adobe Flash Player and Authplay.dll in Adobe Reader 9.x and 10.x via a specially-crafted flash content. If the exploit is successful, it drops a certain file.

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

  TECHNICAL DETAILS

File Size: 532,480 bytes
Memory Resident: No
Initial Samples Received Date: 29 Aug 2011

Arrival Details

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

NOTES:

This is a malicious .PDF document that exploits a certain vulnerability in Adobe Flash Player and Authplay.dll in Adobe Reader 9.x and 10.x via a specially-crafted flash content. If the exploit is successful, it drops the following file:

  • %User Temp%\AdobeARM.dll

This is detected by Trend Micro as BKDR_LBAB.OY. It then executes the said malware. As a result, the malicious routines of the file are also exhibited in the system.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.388.02
FIRST VSAPI PATTERN DATE: 29 Aug 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 files dropped/downloaded by TROJ_PIDIEF.APU

    • BKDR_LBAB.OY

Step 3

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



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