alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET PHISHING TyKit Exfil M2 2025-10-23";
flow:established,to_server;
http.method;
content:"POST";
http.uri; bsize:6;
content:"/x.php"; fast_pattern;
http.request_body;
content:"|7b 22|id|22|"; startswith;
content:"|22|key|22|"; distance:0;
content:"|22|config|22|"; distance:0;
reference:url,any.run/cybersecurity-blog/tykit-technical-analysis/;
classtype:social-engineering;
sid:2065379; rev:1;
metadata:attack_target Client_Endpoint, created_at 2025_10_23, deployment Perimeter, signature_severity Critical, tag Phishing, tag Tykit, updated_at 2025_10_23, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)