ET PHISHING Microsoft Phish Landing Page M1 2026-01-22

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET PHISHING Microsoft Phish Landing Page M1 2026-01-22";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"<title>";
    content:"Update Microsoft Teams to Join Meeting"; distance:0;
    content:"</title>"; distance:0;
    content:"<script>"; distance:0;
    content:".msi"; distance:0; fast_pattern;
    content:"</script>"; distance:0;
    classtype:social-engineering;
    sid:2066988; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2026_01_22, deployment Perimeter, deployment SSLDecrypt, performance_impact Moderate, confidence High, signature_severity Major, tag Phishing, updated_at 2026_01_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)