alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Antifulai.APT CnC Beacon 2"; flow:established,to_server; http.uri; content:".php?file"; fast_pattern; pcre:"/^\x2F[^\x2F]+\x2Fin(?:fo|dex)\x2Ephp\x3Ffile(?:index\x3D[A-Z]|n\x3Dnoexist|wh\x3Dfalse)/"; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/antifulai-targeted-attack-exploits-ichitaro-vulnerability/; classtype:targeted-activity; sid:2018632; rev:4; metadata:attack_target Client_Endpoint, created_at 2014_07_03, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_24, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)