Upon execution, Bifrose.BGE, drops a text file and opens it using Internet Explorer in an attempt to mask its malicious behavior.The text file is created on the user's Desktop as:
The main malware component is then dropped and executed in the system as:
- %My Documents%\msnmsgr_plugin.exe
Once the control has been transfered, this malware then creates a copy of itself in the following folder:
- %Program Files%\Microsoft Live
The copy is named MsnMsgr.exe with the file and folder attributes set to hidden.A startup registry entry is then created:
- HKLM\Software\Microsoft\Active Setup \Installed Components\{B05ADB07-A675-7D8C-6914-85FBE370B83E} stubpath=%Program Files%\Microsoft Live\MsnMsgr.exe s
An additional registry entry is also created:
This entry holds data needed by this malware.Once loaded in memory, this malware then injects its code to Explorer's process space where when executed, it will spawn a hidden browser process that will constantly connect to:
- Artkill.Dyndns.Org TCP PORT 81
It then receives commands from the remote attacker and downloads other components that it needs.When an Internet connection is detected, the malware will download an additional component to be saved as TORplugin.dat, which when configured, will provide basic stealth using the TOR network.