Analysis by: Sabrina Lei Sioting
 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 may be downloaded by other malware/grayware from remote sites.

It takes advantage of an unknown vulnerability in a certain software to allow a remote malicious user or malware to download files on the affected machine.

  TECHNICAL DETAILS

File Size: 16,552 bytes
File Type: PDF
Memory Resident: No
Initial Samples Received Date: 15 May 2012

Arrival Details

This Trojan may be downloaded by the following malware/grayware from remote sites:

  • JAVA_AGENT.REF

It may be downloaded from the following remote sites:

  • http://{BLOCKED}b.net/data/ap1.php?f=6dfda
  • http://{BLOCKED}43.137:8080/data/ap1.php?f=0cf26

Download Routine

After successfully exploiting the said vulnerability, this malware connects to the following URLs to possibly download other malicious files:

  • http://{BLOCKED}b.net/w.php?f=6dfda&e=2 - detected as WORM_OTORUN.DD
  • http://{BLOCKED}b.net/w.php?f=6dfda&e=3 - detected as WORM_OTORUN.DD
  • http://{BLOCKED}43.137:8080/Set.jar - detected as JAVA_BLACOLE.BXF

Other Details

This Trojan takes advantage of an unknown vulnerability in a certain software to allow a remote malicious user or malware to download files on the affected machine.

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 9.107.00
VSAPI OPR PATTERN Date: 15 May 2012

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/grayware files that dropped/downloaded TROJ_PIDIEF.SMB1

Step 3

Remove malware files dropped/downloaded by TROJ_PIDIEF.SMB1

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.SMB1. 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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