alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Tinba Checkin 3"; flow:established,to_server; http.method; content:"POST"; http.header; content:"Content-Length|3a 20|13|0d 0a|"; fast_pattern; http.request_body; content:"|00 04 00 00 00|"; offset:4; depth:5; content:!"|00 00 00 00|"; depth:4; http.header_names; content:!"Referer|0d 0a|"; reference:md5,e610d3c383a4f1c8a27aaf018b12c370; classtype:command-and-control; sid:2020568; rev:6; metadata:created_at 2015_02_25, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_29;)