alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kazy/Kryptor/Cycbot Trojan Checkin"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"?v"; content:"&tq="; pcre:"/\.(jpg|png|gif)\?v[0-9]{1,2}=[0-9]+&tq=/"; http.user_agent; content:"mozilla/2.0"; fast_pattern; startswith; endswith; classtype:command-and-control; sid:2012939; rev:12; metadata:created_at 2011_06_07, signature_severity Major, updated_at 2024_04_13;)