Win32/Korgo.E.worm is a network worm that targets computers running Microsoft Windows XP or Windows 2000 that do not have Microsoft Security Bulletin MS04-011 installed. The worm also monitors TCP ports and opens a backdoor to allow unauthorized access to infected systems. A computer infected with this worm may crash and reboot unexpectedly.

Win32/Korgo.W.worm is a network worm that targets computers running Microsoft Windows XP or Windows 2000 that do not have Microsoft Security Bulletin MS04-011 installed. The worm monitors TCP ports and opens a backdoor to allow unauthorized access to infected computers. A computer infected with this worm may crash and reboot unexpectedly.

Win32/Netsky.U@mm is a mass-mailing worm that targets computers running certain versions of Microsoft Windows. The worm sends itself to e-mail addresses that it finds on the infected computer. The worm is activated when a user opens the attachment that contains the worm. The worm also contains a backdoor and performs denial of service (DoS) attacks against certain Web sites.

Win32/Zafi.C@mm is a mass-mailing worm that targets certain versions of Microsoft Windows. The worm sends itself to certain e-mail addresses that it finds on an infected machine. The worm is activated when a user opens the e-mail attachment that contains the worm. The worm overwrites certain executable files on the infected computer.

Win32/Bagle.F@mm is a mass-mailing worm that targets computers running certain versions of Microsoft Windows. The worm sends itself as an attachment to e-mail addresses on the infected computer. It also spreads through file-sharing networks by copying itself to certain folders. The worm monitors a particular TCP port for instructions from remote attackers.

Win32/Bagle.AY@mm is a mass-mailing worm that targets certain versions of Microsoft Windows. The worm sends itself as an attachment to e-mail addresses that it finds on the infected computer. The worm is activated when a user opens the attachment. The worm monitors a random TCP port for instructions from remote attackers.

Win32/Bagle.T@mm is a mass-mailing worm that targets certain versions of Microsoft Windows. The worm sends e-mail messages that exploit the Internet Explorer vulnerability covered in Security Bulletin MS03-032. The worm monitors TCP ports for instructions from remote attackers. Win32/Bagle.R@mm is also a polymorphic file infector.

Win32/Sober.J@mm is a mass-mailing worm that targets certain versions of Microsoft Windows. The worm sends itself as an attachment to e-mail addresses that it finds on an infected computer. The worm is activated when a user opens the attachment. 

W32.Mimail.G@mm is a mass-mailing worm that targets certain versions of Microsoft Windows. The worm sends itself as an attachment to e-mail addresses on an infected computer. The worm is activated when the user opens the attachment. The worm also launches denial of service (DoS) attacks against certain Web sites.

W32.Mimail.U@mm is a mass-mailing worm that targets certain versions of Microsoft Windows. The worm sends itself as an attachment to e-mail addresses that it finds on the infected computer. The worm is activated when the user opens the attachment. The worm also launches denial of service (DoS) attacks against certain Web sites.

Win32/Sobig.C@mm is a mass-mailing worm that targets computers running certain versions of Microsoft Windows. The worm sends itself to e-mail addresses that it finds on the infected computer. The worm can also spread to writeable network shares.

Win32/HLLW.Nachi.D is a network worm that targets Microsoft Windows 2000 and Windows XP. It propagates by exploiting several known vulnerabilities. It tries to download and apply security updates if it detects the operating system is a certain language version. It also tries to remove certain worms if they are on the infected system.

Worm:Win32/Gaobot.BT is a worm that can spread across network connections by breaking weak passwords or by exploiting vulnerabilities described in Microsoft Security Bulletins MS03-001, MS03-007, or MS03-026. After the Trojan copies and runs itself on a remote computer, it connects to an IRC server to receive commands.

Worm:Win32/Gaobot.CD is a worm that can spread across network connections by breaking weak passwords or by exploiting vulnerabilities described in Microsoft Security Bulletins MS03-001, MS03-007, or MS03-026. After the Trojan copies and runs itself on a remote computer, it connects to an IRC server to receive commands.

Win32/Bropia.C.worm is a worm that targets computers running certain versions of Microsoft Windows. The worm spreads and is activated when a user clicks a file that is sent through MSN Messenger or Windows Messenger. The worm drops Win32/Spybot.AT.worm when it runs on a computer.

Worm:Win32/Gaobot.P is a worm that can spread across network connections by breaking weak passwords or by exploiting vulnerabilities described in Microsoft Security Bulletins MS03-001, MS03-007, or MS03-026. After the Trojan copies and runs itself on a remote computer, it connects to an IRC server to receive commands.

Worm:Win32/Gaobot.AS is a backdoor Trojan that can spread across network connections by breaking weak passwords or by exploiting vulnerabilities described in Microsoft Security Bulletins MS03-001, MS03-007, or MS03-026. After the Trojan copies and runs itself on a remote computer, it connects to an IRC server to receive commands.

Worm:Win32/Kelvir.AQ is a worm that targets computers running certain versions of Microsoft Windows. The worm spreads and is activated when a user opens a file that is sent through MSN Messenger or Windows Messenger.

Win32/Spybot.BJ.worm is a network worm that targets certain versions of Microsoft Windows. When a computer is infected with Win32/Bropia.N.worm, that worm drops Win32/Spybot.BJ.worm on the infected computer. Win32/Spybot.BJ.worm in turn spreads to other computers that do not have Microsoft Security Bulletin MS04-011 (Windows LSASS buffer overflow vulnerability) installed. Win32/Spybot.BJ.worm also has backdoor capabilities, which allow attackers to control a target computer through an IRC channel.