alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET PHISHING [TW] EvilProxy AiTM Microsoft HTTP HOST M9";
flow:established,to_server;
http.host;
content:"browser-events-data-microsoft-"; startswith; fast_pattern;
pcre:"/[a-f0-9]{8}./R";
threshold:type limit, count 1, seconds 30, track by_src;
classtype:social-engineering;
sid:2037859; rev:1;
metadata:attack_target Client_Endpoint, created_at 2022_07_29, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_04;
)