Analysis by: Karl Dominguez
 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

This backdoor connects to a certain URL to send and receive commands from a remote malicious user.

It gathers certain information and sends the gathered information via HTTP POST to a specific URL.

This backdoor may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 77,824 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 22 Dec 2011
Payload: Steals information, Compromises system security

Arrival Details

This backdoor may be dropped by the following malware:

  • TROJ_PPOINTER.SM

Installation

This backdoor is injected into the following processes running in memory:

  • svchost.exe

Backdoor Routine

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

  • {BLOCKED}n.ddns.us, which currently resolves to {BLOCKED}.{BLOCKED}.98.173

Stolen Information

This backdoor sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}.{BLOCKED}.98.173/index.asp

NOTES:

It gathers the following information:

  • BIOS Information
  • CPU Information
  • Disks Information
  • Language
  • MAC Address
  • Machine Name
  • Malware Version
  • Memory Size
  • Network Adapter Information
  • OS Version

Other Details

It has the following backdoor capabilities:

  • Enumerate running processes
  • Execute cmd shell commands
  • Manipulate files
  • Upload/Download Files

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.660.08
FIRST VSAPI PATTERN DATE: 23 Dec 2011
VSAPI OPR PATTERN File: 8.661.00
VSAPI OPR PATTERN Date: 23 Dec 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 BKDR_PPOINTER.SM

Step 3

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