BKDR_POISON.BFHM
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 does not have any propagation routine.
It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
It does not drop any other file.
It does not have any downloading capability.
TECHNICAL DETAILS
36,864 bytes
EXE
Yes
16 May 2013
Connects to URLs/IPs, Collects system information, Logs keystrokes
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 adds the following mutexes to ensure that only one of its copies runs at any one time:
- x1505ajki
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\{GUID}
StubPath = "{malware path}\{malware file name}.exe"
Other System Modifications
This backdoor adds the following registry keys:
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
FastMofa
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
FastMofa\Recent File List
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
FastMofa\Settings
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Manage files, registry, processes, services, devices, and installed applications
- Download and inject remote codes to legitimate processes
- Capture screenshots, webcam and audio
- Log keystrokes and active window
- Manage open windows
- Perform remote shell
- Relay server
- Retrieve cached passwords and hashes
- Send hardware information (CPU speed, Memory)
- Send system information (LAN IP, WAN IP, Computer name, User name, Account Type, OS)
- Update, Uninstall, Restart the malware
- View active ports
It connects to the following websites to send and receive information:
- {BLOCKED}.{BLOCKED}.88.66:443
Dropping Routine
This backdoor does not drop any other file.
Download Routine
This backdoor does not have any downloading capability.
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). The malware then injects its code to the said process, which contains its backdoor routines.
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.300
9.934.02
22 May 2013
9.935.00
23 May 2013
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
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_CURRENT_USER\Software
- Local AppWizard-Generated Applications
- Local AppWizard-Generated Applications
Step 4
Delete this registry value
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\{GUID}
- StubPath = "{malware path}\{malware file name}.exe"
- StubPath = "{malware path}\{malware file name}.exe"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_POISON.BFHM. 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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