alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET POLICY Observed KnowBe4/Popcorn Training Simulated Phish Landing Page M4";
flow:established,to_client;
file.data;
content:"|3c|div|20|class|3d 22|disclaimer|22 3e 0d 0a 3c|p|3e|Please|20|Note|3a 20|This|20|message|20|came|20|from|20|KnowBe4|2c 20|Inc|2e 20|";
threshold:type limit, track by_dst, count 1, seconds 120;
classtype:credential-theft;
sid:2031519; rev:3;
metadata:attack_target Client_Endpoint, created_at 2021_01_12, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_23;
)