alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET PHISHING Successful LinkedIn Phish 2015-09-17";
flow:to_server,established;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.request_body;
content:"a="; depth:2; nocase;
content:"&Action.CorpUser.Signon="; fast_pattern; nocase; distance:0;
content:"&CorporateSignonAccessChannel="; nocase; distance:0;
content:"&UserType="; nocase; distance:0;
classtype:credential-theft;
sid:2031831; rev:5;
metadata:attack_target Client_Endpoint, created_at 2015_09_16, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_09_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)