Summary
Trojan:W32/Dursg.D downloads additional files (possibly malware) from remote sites without the knowledge or authorization of the user.
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
Execution
Upon executing, Trojan:W32/Dursg.D creates this directory:
- %appdata%\SystemProc
It also creates these files under the new directory:
- %appdata%\SystemProc\lsass.exe - a copy of itself
- %appdata%\SystemProc\upd.exe
Activity
Once installed, Dursg.D attempts to connect and download from the following websites:
- http://controllqz.com/[removed]?aid=hidden
- http://simfreebox.com/[removed]?sd=2010-05-15&aid=hidden
Trojan:W32:Dursg.D deletes itself after execution.
Registry Changes
The following registry keys are created to set a launchpoint:
- HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run RTHDBPL = C:\Documents and Settings\user\Application Data\SystemProc\lsass.exe
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