Opera
Threat LevelDamageDistribution

Effects 

Opera spreads to other computers by copying its code to other files or programs. It has damaging effects on the affected computer.

Means of transmission 

Opera does not spread automatically using its own means. It needs the attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

Further Details  

Opera has the following additional characteristics:

• It is written in the programming language Assembler x86-16 bit.
• It is 1020 bytes in size.