rfa2.dll is a Trojan.Bankash-L. rfa2.dll tries to terminate antiviral programs installed on a user computer. rfa2.dll monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\rfa2.dll More info: http://www.sophos.com/virusinfo/analyses... Removal: Remove rfa2.dll Windows startup using antivirus (also check How To Remove section)Startup Optimizer.