alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING PerSwaysion Landing Page M3"; flow:established,to_client; file.data; content:"|3c|link|20|href|3d 22 22 20|rel|3d 22|shortcut|20|icon|22 20 2f 3e|"; content:"document|2e|write|28|"; distance:0; content:"atob|28|"; within:40; content:"PHNjcmlwdD5ldmFsKGZ1bmN0aW9uKCRuYnJ1dCw"; within:150; fast_pattern; reference:url,blog.group-ib.com/perswaysion; classtype:credential-theft; sid:2033063; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_06_01, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_01, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)