alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET PHISHING PerSwaysion Landing Page M2";
flow:established,to_client;
file.data;
content:"|3c|title|3e 3c 2f|title|3e 3c|link|20|href|3d 22 22 20|rel|3d 22|shortcut|20|icon|22 20 2f 3e 3c 2f|head|3e 3c|body|20|class|3d 22|";
content:"|3e 3c 2f|div|3e 3c|script|3e|document|2e|write|28|atob|28 27|PHNjcmlwdD52YXIgXzB4"; fast_pattern; within:200;
content:!":<script>"; distance:0;
content:"|27 29 29 3c 2f|script|3e 3c 2f|body|3e 3c 2f|html|3e|"; endswith;
content:!"|0d 0a|";
reference:url,blog.group-ib.com/perswaysion;
classtype:credential-theft;
sid:2033049; rev:2;
metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_05_28, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_28;
)