Lamer Exterminator is a computer virus created for the Amiga.
It is a boot block virus contained in the first 1024 bytes of the disk.
It hooks into the system in such a way that examining a bootblock will return a normal result and upon replicating will also encrypt itself.
The next includes an add byte in its decrypt routine, and takes a maximum of 256×256 attempts.
The third uses 16 bit words in its decrypt routine, and takes a maximum of 65535×65535 attempts, which makes it less practical to solve.