BKDR_POISON.AJW
Gen:Variant.Zusy.826 (FSecure); Trojan.Win32.Jorik.PoisonIvy.xt [Kaspersky]; Backdoor:Win32/Poison.E (Microsoft)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to a website to send and receive information.
TECHNICAL DETAILS
49,152 bytes
EXE
Yes
14 Mar 2012
Arrival Details
This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It 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 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.)
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\{700E638C-2004-439F-EEC4-6F3EFBED8F3F}
StubPath = "{malware path}{malware name}.exe"
Other System Modifications
This backdoor adds the following registry keys as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{700E638C-2004-439F-EEC4-6F3EFBED8F3F}
Backdoor Routine
This backdoor connects to the following websites to send and receive information:
- looktest.{BLOCKED}ee.com
SOLUTION
9.200
8.834.06
14 Mar 2012
8.835.00
15 Mar 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
Step 3
Search and delete this folder
- %System Root%\dfed
Step 4
Search and delete this file
Step 5
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
- {700E638C-2004-439F-EEC4-6F3EFBED8F3F}
- {700E638C-2004-439F-EEC4-6F3EFBED8F3F}
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_POISON.AJW. 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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