Analysis by: Cris Nowell Pantanilla
 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 may be dropped by other malware.

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

  TECHNICAL DETAILS

File Size: 360,448 bytes
File Type: DLL
Initial Samples Received Date: 10 Oct 2011
Payload: Steals information

Arrival Details

This backdoor may be dropped by other malware.

Installation

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

  • Skype.exe
  • SkypePM.exe
  • explorer.exe
  • msnmsgr.exe
  • yahoomessenger.exe
  • x-lite.exe
  • sipgatexlite.exe
  • paltalk.exe

Backdoor Routine

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

  • Download and upload programs
  • Execute programs
  • Get system information
  • Installing component files
  • Take screenshot
  • Uninstall self

NOTES:

Information Theft:

It logs keystrokes when using the following Internet browsers:

  • firefox.exe
  • iexplore.exe
  • navigator.exe
  • opera.exe
  • seamonkey.exe

This backdoor is capable of listening to conversation from the following applications:

  • MSN Messenger
  • Paltalk
  • Sip-Gate x-lite
  • Skype
  • x-lite
  • Yahoo Messenger

This backdoor is capable of recording conversations from Skype.

This backdoor gathers the following information from certain applications:

  • Call Information
  • Call Partner
  • Call Partner Number
  • Connection Status
  • File Transfer Logs
  • Message Sent/Received
  • Message Status
  • User Status

It attempts to connect to the following remote IP addresses:

  • {BLOCKED}.98.1
  • {BLOCKED}.140.90

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.490.01
FIRST VSAPI PATTERN DATE: 12 Oct 2011
VSAPI OPR PATTERN File: 8.491.00
VSAPI OPR PATTERN Date: 12 Oct 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

Scan your computer with your Trend Micro product and note files detected as BKDR_R2D2.SMR

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete the file detected as BKDR_R2D2.SMR

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files in the search result.

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_R2D2.SMR. 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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