Lyceum is an advance stealthed client/server backdoor that uses encrypted spoofed UDP packets to administer the server and the two built-in ICMP backdoors. Each ICMP backdoor exploits a different feature of the protocol, the first creating a bi-directionally spoofed ICMP tunnel and the second uses passive nodes as zombies to relay ICMP backdoor traffic.
Lyceum is an advance stealthed client/server backdoor that uses encrypted spoofed UDP packets to administer the server and the two built-in ICMP backdoors. Each ICMP backdoor exploits a different feature of the protocol, the first creating a bi-directionally spoofed ICMP tunnel and the second uses passive nodes as zombies to relay ICMP backdoor traffic.