BKDR_MATCHALDR.C
Gen:Trojan.Heur.JP.gqW@a8WSyjni (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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 opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system. It executes commands from a remote malicious user, effectively compromising the affected system. However, as of this writing, the said sites are inaccessible.
It does not drop any other file.
TECHNICAL DETAILS
104,960 bytes
EXE
No
12 Apr 2012
Compromises system security, 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.
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.
It executes the following commands from a remote malicious user:
- Download and execute files
- Enumerate processes
- Terminates itself
- Upload files
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}.{BLOCKED}.37.121
However, as of this writing, the said sites are inaccessible.
Dropping Routine
This backdoor does not drop any other file.
NOTES:
Other Details
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.200
8.904.02
12 Apr 2012
8.905.00
13 Apr 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
Scan your computer with your Trend Micro product and note files detected as BKDR_MATCHALDR.C
Step 3
Terminate a process file/s detected as BKDR_MATCHALDR.C
*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_MATCHALDR.C. 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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