BKDR_POISON.AE
Backdoor.Win32.Inject.xjq (Kaspersky); BackDoor-AMQ.dr (Mcafee)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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 may be dropped by other malware.
It does not have any propagation routine.
It connects to a website to send and receive information. However, as of this writing, the said sites are inaccessible.
It does not have any downloading capability.
It does not have any information-stealing capability.
TECHNICAL DETAILS
49,152 bytes
EXE
Yes
04 Feb 2009
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.
It may be dropped by the following malware:
- TROJ_DRPR.AS
Installation
This backdoor adds the following folders:
- %System Root%\dfed
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It drops the following files:
- %System Root%\asf - empty file
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- DK#FKAIRD
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\{6068A328-3774-1EEB-471C-E9AB2A6941DA}
StubPath = "{malware path and filename}"
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor connects to the following websites to send and receive information:
- {BLOCKED}.dyndns-free.com
However, as of this writing, the said sites are inaccessible.
Download Routine
This backdoor does not have any downloading capability.
Information Theft
This backdoor does not have any information-stealing capability.
NOTES:
This backdoor queries the default web browser by accessing the following registry entry:
HKEY_CLASSES_ROOT\http\shell\open\command
This backdoor does not have rootkit capabilities.
This backdoor does not exploit any vulnerability.
This malware does not communicate through proxy server.
SOLUTION
9.200
5.816.02
04 Feb 2009
5.817.00
05 Feb 2009
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 3
Restart in Safe Mode
Step 4
Delete this registry key
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
- {6068A328-3774-1EEB-471C-E9AB2A6941DA}
- {6068A328-3774-1EEB-471C-E9AB2A6941DA}
Step 5
Search and delete this folder
- %System Root%\dfed
Step 6
Search and delete this file
- %System Root%\asf
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_POISON.AE. 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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