Cimuz.X is a Trojan that opens a random port, acting as a backdoor and allowing the affected computer to be used as an HTTP proxy.
Then, it connects to several web addresses, in order to notify its author that the computer has been compromised.
Cimuz.X is able to bypass process oriented firewalls, as it injects its own process into others that may have unlimited access to the Internet. It also adds its process to the list of authorized applications of the Windows XP firewall.
Cimuz.X does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.