alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Trojan.BlackRev Botnet Command Request CnC Beacon"; flow:established,to_server; http.uri; content:"/gate.php?cmd="; fast_pattern; pcre:"/\/gate\.php\?cmd=(?:get(?:installconfig|exe)|urls)$/"; http.header_names; content:!"Referer|0d 0a|"; reference:url,www.btpro.net/blog/2013/05/black-revolution-botnet-trojan/; classtype:command-and-control; sid:2017723; rev:4; metadata:attack_target Client_Endpoint, created_at 2013_11_15, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)