Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes commands from a remote malicious user, effectively compromising the affected system.

It retrieves specific information from the affected system. It sends the information it gathers to remote sites.

  TECHNICAL DETAILS

File Size: 24,576 bytes
Memory Resident: Yes
Initial Samples Received Date: 24 Jul 2012
Payload: Connects to URLs/IPs

Arrival Details

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Backdoor Routine

This backdoor executes the following commands from a remote malicious user:

  • Upload a file
  • Download a file
  • Start a remote command prompt

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • http://traffic.{BLOCKED}list.org/main/map/news/index.php
  • http://traffic.{BLOCKED}list.org/main/map/news/xmlrpc.php
  • http://traffic.{BLOCKED}list.org/main/map/news/feeds.php
  • http://traffic.{BLOCKED}list.org/main/map/news/show.php

Information Theft

This backdoor retrieves the following information from the affected system:

  • Computer name

It sends the information it gathers to remote sites.

Other Details

This backdoor uploads files to the following website(s):

  • http://traffic.{BLOCKED}list.org/main/map/news/files/

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 9.283.00
VSAPI OPR PATTERN Date: 24 Jul 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

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_PROXY.SM. 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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