MtE is not really a virus, but an "add-on" product supplied by the person who calls himself Dark Avenger from Bulgaria. It can be used to give any virus a "Polymorphic" ability, making it undetectable with a signature-based scanner.

Instead, an algorithmic approach is used, which may (theoretically) produce false alarms. If your Virus protection indicates that MtE is a Virus or if it is detecting a virus with MtE listed within the name, it may just be a false or positive alarm. If you get an alarm from a data file (non-executable), it is a certain false alarm.

One known false alarm is a file called 120492_v.dxf. If you find MtE from this file, simply ignore it.

Several viruses are already known which make use of this "Mutation Engine"; therefore, there are several Variants of this Virus.