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>Error</title>"; 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:2039782; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_11_15, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_15;)