alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE PunkeyPOS HTTP CnC Beacon 9";
flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php";
http.request_body;
content:"action="; depth:7;
content:"&uid="; distance:0;
content:"key="; distance:0; fast_pattern;
pcre:"/&(?:un)?key=[A-Z]+$/";
http.header_names;
content:!"Accept-";
content:!"Referer|0d 0a|";
reference:url,trustwave.com/Resources/SpiderLabs-Blog/New-POS-Malware-Emerges---Punkey/;
reference:md5,aa87ab0c51887b86b48c009931dcc410;
classtype:command-and-control;
sid:2021168; rev:3;
metadata:attack_target Client_Endpoint, created_at 2015_05_29, 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;
)