Threat description



F-Secure Anti-Virus had a relatively common false alarm with this virus in March 2001. This false alarm caused FSAV to report the Opera virus in several different VxD files.


If you find Opera in a file with vxd extension, simply download the latest updates for your F-Secure Anti-Virus to fix this false alarm.

Technical Details

Opera is a DOS-based virus. Two varianst are currently known. It is resident, non-encrypted, non-polymorphic. Infects COM and VXD files using prepending infection method. The virus can be removed using F-Secure Anti-Virus.

Submit a Sample

Suspect a file or URL was wrongly detected? Send it to our Labs for further analysis

Submit a Sample

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

More Info