ET PHISHING Successful NHS Webmail Phish 2020-03-23

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET PHISHING Successful NHS Webmail Phish 2020-03-23";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.header;
    content:"nhs"; nocase;
    http.request_body;
    content:"usr="; nocase;
    content:"&pss="; nocase; fast_pattern;
    content:"formimage1.x="; nocase;
    content:"formimage1.y="; nocase;
    classtype:credential-theft;
    sid:2029701; rev:2;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_03_23, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_03_23, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)