alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kazy/Kryptor/Cycbot Trojan Checkin 2"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"?tq="; fast_pattern; pcre:"/\.(?:(?:jp|pn)g|cgi|gif)\?tq=/"; http.header_names; content:!"Referer|0d 0a|"; classtype:command-and-control; sid:2013865; rev:8; metadata:created_at 2011_11_08, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_28;)