Modified by: Roland Marco Dela Paz
ALIASES:

Backdoor:Win32/Poison.E (Microsoft); W32/PoisonIvy.gen22 (Norman )

 PLATFORM:

Windows 2000, Windows XP, Windows Server 200

 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 has certain capabilities.

This backdoor may be dropped by other malware.

It connects to a website to send and receive information.

  TECHNICAL DETAILS

File Size: 141,824 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 24 Feb 2012
Payload: Compromises system security, Connects to URLs/IPs

Arrival Details

This backdoor may be dropped by the following malware:

  • TROJ_DROPPR.BDE

Installation

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

  • %Windows%\iexplore.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • gasdfthr

Autostart Technique

This backdoor adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{8B35591D-F2ED-F6FF-2ADD-A9092E664359}
StubPath = "%Windows%\iexplore.exe"

Backdoor Routine

This backdoor connects to the following websites to send and receive information:

  • {BLOCKED}ain.m3th.org

NOTES:

This backdoor has the following capabilities:

  • Capture screen shots, webcam, audio
  • Delete, search, and upload files
  • Download and inject remote codes to legitimate processes
  • Log keystrokes and active window
  • Manage processes and services
  • Modify and search the registry entries
  • Perform a shell command
  • Send system information (IP address, computer name, user name, operating system)
  • Update/Uninstall the malware
  • View and terminate active windows and ports

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.798.06
FIRST VSAPI PATTERN DATE: 24 Feb 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 files dropped/downloaded by BKDR_POISON.BJG

     TROJ_DROPPR.BDE

Step 3

Identify and terminate files detected as BKDR_POISON.BJG

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
    • {8B35591D-F2ED-F6FF-2ADD-A9092E664359}

Step 5

Scan your computer with your Trend Micro product to delete files detected as BKDR_POISON.BJG. 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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