The worm penetrated the AV checker and then opened a back door to shedloads of gay porn which swamped the server.
The porn created a denial of service attack on the network and managers had to shut down the entire network and scrub it out with soap.
Cyber plods think that the attack was something to do with the sacking of an assistant to the upper house's vice president, after images of him attending a homosexual party in Rome surfaced. ยต