The first variant of this virus appears to have been written to force
TBScan to use the DOS file system and ignore the contents of
Anti-vir.dat. It is also known as the "Thunderbyte Killer" due to the
text "The Rise and Fall of Thunderbyte-1994-Australia. You Will Never
Trust Anti-Virus Software Again!!", but it also attempts to avoid
detection by F-Secure anti-virus products and Norton Antivirus.
Lemming has been reported to be widespread in Australia.
There are few known variants.