alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET INFO Trend Micro Phishing Simulation Service";
flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"<title>You could have been phished"; nocase;
content:"Trend Micro Phish Insight provides a phishing simulation service"; nocase; fast_pattern;
threshold:type limit, count 1, seconds 600, track by_src;
classtype:social-engineering;
sid:2036506; rev:2;
metadata:attack_target Client_Endpoint, created_at 2022_05_06, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_06, reviewed_at 2023_09_01;
)