Bifrose.SN is a variant of the Bifrose family of backdoors.
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 detection database 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.
When run, Bifrose.SN copies itself under %SysDir% directory using the name winampxp.exe. It installs the following registry key to make sure it will be executed next time the system is started:
After the installation, Bifrose.SN tries to locate a web browser and inject code into it. The injected code is the actual backdoor. The backdoor starts to communicate with the following servers using a specially crafted HTTP queries:
The servers can instruct the backdoor to execute the following actions: