Win32/Mydoom is a family of mass-mailing worms that spread through e-mail. Some variants also spread through peer-to-peer networks. The worm acts as a backdoor Trojan, which allows an attacker to access the infected system. This backdoor may be used to distribute other malicious software. Some variants of Win32/Mydoom launch denial of service (DoS) attacks against specific Web sites. 

Backdoor:Win32/Mydoom.gen is a generic detection for a family of backdoor Trojans that connect to an Internet Relay Chat (IRC) Server, and await IRC commands issued by a remote attacker. Commands sent from an attacker for the Trojan to perform could include downloading and executing files, collecting sensitive data, and performing spam runs. Other variants of the Mydoom family are worms that send a copy of the worm to gathered e-mail addresses, from the infected computer.

Win32/Mydoom.B@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer. The worm also installs a .dll file that acts as a backdoor. After February 1, 2004, the worm attempts a denial-of-service (DoS) attack against www.sco.com.

Win32/Mydoom.A2@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer. The worm also installs a .dll that acts as a backdoor. After February 1, 2004, the worm attempts to perform a denial-of-service (DoS) attack against www.sco.com.

Win32/Mydoom.S@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer. The worm also downloads and runs a file that acts as a backdoor. 

Win32/Mydoom.T@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer. The worm also installs a .dll file that acts as a backdoor.

Win32/Mydoom.F@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer. The worm also installs a .dll file that acts as a backdoor. The worm attempts a denial-of-service (DoS) attack against www.microsoft.com or riaa.com if the date is between 17 and 22 of any month.

Worm:Win32/Mydoom!zip is the detection for ZIP files containing samples that belong to the Win32/Mydoom family of worms.

Win32/Mydoom.P@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer. The worm also creates a backdoor Trojan.

Win32/Mydoom.AC@mm is a mass-mailing worm that sends itself to e-mail addresses it finds on the infected computer.