HKTL_FYRSNIFF
HKTL_FYRSNIFF is a dangerous hacktool disguised as a legitimate Firefox add-on. HKTL_FYRSNIFF can be downloaded by unsuspecting users from malicious websites. HKTL_FYRSNIFF monitors online transactions on certain websites and once it is executed it will launch the Carnivore sniffer to retrieve user IDs or session IDs from the cookie data of network packets.
