Nimda originally surfaced in 2001 and quickly rosed to the top. The name of the infection is gotten from "Administrator" spelled in reverse.
It just required 22 minutes for this risky infection to spread through four distinct ways - email, server weaknesses, shared organizers and document move. The worm was delivered on September 18, 2001, seven days after the 9/11 assaults which constrained many individuals to accept that Nimda is a Digital Dread assault as it immediately caught practically every one of the sources through which the infection can taint most extreme number of PCs. Though, the main role of this infection was to dial back the web traffic impressively causing a forswearing in-administration assault.
Spreading through email and Website pages, this worm designated Web servers, easing back Web execution almost to a stop. It likewise opened a secondary passage to the PC's working framework, permitting a programmer admittance to the PC. In any case, access was restricted by client account authorizations.
Quickest spreading PC infection ever.