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.
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:
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