alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Observed Zimbra Phishing Landing Page 2021-08-09"; flow:established,from_server; file.data; content:"<title>Zimbra Web Client Sign In</title>"; content:"<form method|3d 22|post|22|"; distance:0; content:"name|3d 22|loginForm|22|"; distance:0; content:"action|3d 22|mll.php|22|"; distance:0; fast_pattern; content:"accept-charset|3d 22|UTF-8|22|"; reference:url,app.any.run/tasks/bda22930-0bfb-4ccd-b5c4-26f526b8cba7; classtype:social-engineering; sid:2033697; rev:1; metadata:created_at 2021_08_09, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_09, reviewed_at 2024_05_07;)