BKDR64_HIKIT.EF
Windows XP (64-bit), Windows Vista (64-bit), Windows 7 (64-bit)
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 have any downloading capability.
TECHNICAL DETAILS
190,976 bytes
EXE
Yes
16 Oct 2013
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.
Installation
This backdoor drops the following component file(s):
- %User Temp%\~cache_4e64724140404d6b6e.tmp
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This backdoor registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\NetDDESrv
ImagePath = "{malware path and file name}"
It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\NetDDESrv
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- List service
- Start/Stop/Delete service
- Start/Stop connection to server
- Perform remote shell
- Execute file
- Sleep
- Terminate self
- Get proxy server information (Proxy type, proxy name, user name, password)
- Get system information (OEMCP)
- Get drive information
It connects to the following websites to send and receive information:
- {BLOCKED}.{BLOCKED}.206.95:443
Download Routine
This backdoor does not have any downloading capability.
NOTES:
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.300
10.342.07
16 Oct 2013
10.343.00
17 Oct 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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- NetDDESrv
- NetDDESrv
Step 4
Search and delete this file
- %User Temp%\~cache_4e64724140404d6b6e.tmp
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR64_HIKIT.EF. 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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