BKDR_BIFROSE.FTJ

 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:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size:

32,704 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

06 Jun 2012

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.

Installation

This backdoor drops the following copies of itself into the affected system:

  • %WINDOWS%\Resources\services.exe

Other System Modifications

This backdoor adds the following registry keys:

HKEY_CURRENT_USER\Software\services
pnp = {Hex Value}

HKEY_LOCAL_MACHINE\SOFTWARE\services
Ask = {Hex Value}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{05AEC6D8-881A-0CAB-D02D-9FCDF82279EF}
stubpath = "%WINDOWS%\Resources\services.exe"

Other Details

This backdoor connects to the following possibly malicious URL:

  • www.{BLOCKED}r.3d-game.com

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.176.02

FIRST VSAPI PATTERN DATE:

06 Jun 2012

VSAPI OPR PATTERN File:

9.177.00

VSAPI OPR PATTERN Date:

07 Jun 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 Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software
    • services
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • services
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
    • {05AEC6D8-881A-0CAB-D02D-9FCDF82279EF}

Step 4

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