BKDR_POISON.ETQP
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
This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It connects to a website to send and receive information.
TECHNICAL DETAILS
Arrival Details
This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
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 drops the following copies of itself into the affected system:
- %System%:applesups.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- AK#%JS!DA
- #F*AJJ^@F
It injects itself into the following processes as part of its memory residency routine:
- explorer.exe
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\{351D4F5A-7954-7732-8265-6818E9DD2A7B}
StubPath = "%System%:applesups.exe"
Backdoor Routine
This backdoor connects to the following websites to send and receive information:
- {BLOCKED}e-com.3322.org
- {BLOCKED}.dyndns-free.com
NOTES:
It queries the default web browser by accessing the following registry entry:
HKEY_CLASSES_ROOT\http\shell\open\command
It then launches a hidden Web browser process (e.g. iexplore.exe) where this malware injects its code for its backdoor routines.
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
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
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
- {351D4F5A-7954-7732-8265-6818E9DD2A7B}
- {351D4F5A-7954-7732-8265-6818E9DD2A7B}
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_POISON.ETQP. 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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