Briss.A is a Trojan that goes memory resident and that installs other malware, every 24 hours, in the affected computer without user's consent. In order to do so, Briss.A uses a list of programs taken out from the web site www2.flingstone.com.
Some examples of the malware Briss.A installs are: Adware/180Solutions, Trj/Revop.F, Adware/Searchcentrix, etc.
In addition, Briss.A has other functionalities, such as detecting if certain combinations of keys are pushed.
Briss.A does not spread automatically using its own means. It needs the attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, e-mail messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.