Starting in April, a generation of Conficker computer virus started an attack on all network computers and began a chaos for antivirus companies. There are many version of Conficker however the major topic is involved with Conficker C, which is a worm released an update that could activate the botnet to deliver spam and turn infected PCs into zombies. It then uses these zombies and started to send out spam emails so it can spread to the next victim. Once your computer became a victim, you have to spend some efforts to search and destroy it since major antivirus companies are still in search for the cure.

The latest update could include a connection between the Conficker worms to the active spam bot W32.Waledac. Researchers have seen circumstantial evidence that the latest strain of Conficker, known as Downadup E, might drop a Waledac binary on machines infected with Conficker C. That binary is designed to steal information and turn infected PCs into spam-spewing drones under the control of the malware creators. This can be a major leak for system and network administrators for enterprises. Before its update April 1, Conficker C was renowned for exhibiting an array of sophisticated self-preservation techniques, which included blocking access to security vendor sites, capable to avoid numerous antivirus products, and disabling Windows automatic updates. In addition, Conficker C has the ability to patch its own vulnerability once it has infected a machine, presumably to prevent competing malware from attacking the same host.

The newest and updated Conficker prefers to travel through peer-to-peer networks to distribute its new version E. The new strain of the Conficker worm updates machines infected with Conficker C to the new strain, known as Downadup E via peer-to-peer techniques. The latest version also have the unseen self-removal functionality that is programmed with the ability to eliminate itself from infected hosts on May 3, and reaches out to a new list of high-profile domains.