Summary
This program is packed using a packer program associated with numerous other malware.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
Packed:W32/Tibs.AB identifies packed files with similar functionality to Email-Worm:W32/Zhelatin. Tibs.AB files are usually downloaded by clicking malicious links in heavily spammed email messages
Execution
On execution, the malware creates these files:
- %windir%\system32\windev-[random_numbers].sys
- %windir%\system32\windev-peers.ini
And then hides them.
Activity
A noticeable characteristic for this malware is that it tries to connect to a lot of predefined IP addresses using UDP. A text file is also dropped which contains a possible lists of clients for the worm's peer-to-peer network. The details for the peer names and access ports are encoded. Example of the text file:
[config] [local] [peers] 61CBE5C404F4C715C809A8588F42950C=9A2542751EBF00 61CBE5C4CB3D735B77590054E92865F3=9A2542BB1EBF00 8024083AF066B98A86BF0B0BF1135EF7=55198859159800 80A32744A44A3359F3F4B39D19E8E32B=53258C841C4400
Rootkit
The installed component has rootkit functionality that can enable its process to be hidden from unsuspecting users.
Registry Modifications
The malware sets these values:
- HKLM\System\CurrentControlSet\Services\windev-[random_numbers] ImagePath = %systemdir%\windev-[random_numbers].sys
Note: Usually %systemdir% is C:\Windows\system32
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