Analysis by: Sabrina Lei Sioting
 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

  TECHNICAL DETAILS

File Size: 90,780 bytes
File Type: PDF
Memory Resident: Yes
Initial Samples Received Date: 27 Aug 2010

Other Details

Based on analysis of the codes, it has the following capabilities:

  • It contains an obfuscated JavaScript that when deobfuscated is detected by Trend Micro as EXPL_EXECOD.A. As a result, malicious routines of the deobfuscated script are exhibited on the affected system.
  • This deobfuscated script also contains a shellcode that drops a copy of the malware to %System root%\a.pdf.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 07.414.01
VSAPI OPR PATTERN Date: 27 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.XPL

     EXPL_EXECOD.A

Step 3

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