alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Linux/Moose HTTP CnC Beacon"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?p="; fast_pattern; content:"&f="; distance:0; content:"&m="; distance:0; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:url,welivesecurity.com/wp-content/uploads/2015/05/Dissecting-LinuxMoose.pdf; classtype:command-and-control; sid:2021147; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_05_26, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_05_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)