It's a nasty trojan, actually, but it appears your antivirus caught it.
Some info:
http://www.symantec.com/avcenter/venc/dyn/11038.html
And:
"The SubSeven twist
U.S. computer security company iDefense Wednesday supported Netsec's findings, but only in relation to the SubSeven Trojan virus. Version 2.1 of SubSeven, and probably other releases, can use the Internet relay chat channels to launch "ping flood" denial-of-service attacks using IRC commands from infected servers, iDefense said in a statement.
This capability lets a malicious attacker launch a distributed denial-of-service attack using all the compromised machines logged onto the appropriate IRC channel at any given time, iDefense said.
This IRC command capacity is significant because corporate firewalls that are not configured to block IRC outbound traffic will not stop the commands; the commands also will flow freely from small businesses and homes furnished with permanent DSL and cable modem connections, the iDefense statement said.
Using this feature, attackers can command every compromised computer to send out thousands of large ping packets to a particular IP address at the same time. The iDefense statement made it clear that "this is not the same master and zombie/slave relationship that has come to be identified with distributed denial-of-service tools such as Trinoo and Stacheldraht, but SubSeven is capable of launching a denial-of-service attack distributed across potentially thousands of machines," without their owners noticing it."
Gtz.
