BKDR_WINCODA.A
Windows
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Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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 executes commands from a remote malicious user, effectively compromising the affected system.
TECHNICAL DETAILS
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.
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- WINCMD - perform remote command shell
- TASKKILL - terminate a certain process
- SHUTDOWN - terminate itself
- SLEEP - sleep for a specified time
- PUTFILE - download arbitrary file
Information Theft
This backdoor gathers the following data:
- computer name
- user name
- operating system version
NOTES:
It gets the IP address of the following site:
- {BLOCKED}ra.googlesale.net
It generates a new IP address by switching the numbers of the acquired IP address:
- Original IP Address = {1st number}.{2nd number}.{3rd number}.{4th number}
- New IP Address = {2nd number}.{3rd number}.{4th number}.{1st number}
It connects to the following URL to send the gathered information and receive commands from a remote malicious user:
- {New IP Address}:443
As of this writing, there is no response from the generated new IP address.
SOLUTION
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
Scan your computer with your Trend Micro product to delete files detected as BKDR_WINCODA.A. 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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