alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Pgift.Backdoor APT CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/pgift.asp"; fast_pattern; http.user_agent; content:"Mozilla/4.0 (compatible|3b|)"; bsize:25; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; reference:url,www.fireeye.com/blog/technical/threat-intelligence/2014/07/spy-of-the-tiger.html; classtype:targeted-activity; sid:2018869; rev:6; metadata:attack_target Client_Endpoint, created_at 2014_08_01, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_25, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)