TrojanDownloader:Win32/Agent.ABC is a trojan that drops and installs additional malware.

Worm:Win32/Slenfbot.ABC is a worm that can spread via MSN Messenger, and may spread via removable drives. The worm also contains backdoor functionality that allows unauthorized access to an affected machine. This worm does not spread automatically upon installation, but must be ordered to spread by a remote attacker.

Worm:Win32/Autorun.ABC is a worm - a self-propagating program that can spread itself from one computer to another. Worms may spread themselves via a variety of different channels in order to compromise new computers. Variants of Worm:Win32/Autorun usually spread using methods that include, but may not be limited to, copying themselves to removable or network drives, and placing an autorun.inf file in the root directory of each affected drive in an attempt to ensure that the worm is run when the removable drive is attached, or the network drive is visited from a remote system supporting the Autorun feature.

TrojanDownloader:Win32/Banload.ABC is a member of Win32/Banload - a family of trojans that downloads other malware. Banload is usually used to download and install members of the Win32/Banker and Win32/Bancos families onto affected computers. Win32/Banker and Win32/Bancos are trojans that steal banking credentials and other sensitive data, and send it back to a remote attacker.