A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Virus:W32/Runouce.gen!A is a Generic Detection for Email-Worm:W32/Runouce.
About Generic Detections
Unlike more traditional detections (also known as signatures or single-file detections) a Generic Detection does not identify a unique or individual malicious program. Instead, a Generic Detection looks for broadly applicable code or behavior characteristics that indicate a file as potentially malicious, so that a single Generic Detection can efficiently identify dozens, or even hundreds of malware.