Troj/Bdoor-ABN is a backdoor Trojan that allows others remote access to your computer over a network.
The trojan copies itself to the Windows System folder as a file with a random name and adds an entry to the registry at
HKLM\Software\Microsoft\Windows\
CurrentVersion\Run\Microsoft Diagnostic
to run itself on Windows startup.
The Trojan may attempt to update itself by downloading and executing an EXE file from the internet.
It may disable the following firewall programs:
ZoneAlarm
ZoneAlarm Pro
Tiny Personal Firewall
Sygate Personal Firewall.
Troj/Bdoor-ABN attempts to connect to an IRC server and join a channel where it will wait for commands issued by an attacker. The attacker will be able to launch DDoS (distributed denial of service) attacks on designated IP addresses.