BKDR_GENTA.FHH
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
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 may be dropped by other malware.
It does not have any propagation routine.
It executes commands from a remote malicious user, effectively compromising the affected system.
It does not drop any other file.
It does not have any downloading capability.
TECHNICAL DETAILS
40,704 bytes
DLL
Yes
19 Jun 2013
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_DROPPER.FHH
Other System Modifications
This backdoor adds the following registry entries:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services
Description = "%System%\cisvc.exe"
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- Execute files
- Delete files
- Perform a shell command
- Get system information (IP address, hostname)
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- http://homeftp.{BLOCKED}s.eu
As of this writing, the said sites are inaccessible.
Dropping Routine
This backdoor does not drop any other file.
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
10.106.02
21 Jun 2013
10.107.00
22 Jun 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
Remove the malware/grayware file that dropped/downloaded BKDR_GENTA.FHH. (Note: Please skip this step if the threat(s) listed below have already been removed.)
Step 3
Restart in Safe Mode
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\System\CurrentControlSet\Services
- Description = "%System%\cisvc.exe"
- Description = "%System%\cisvc.exe"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_GENTA.FHH. 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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