alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Fake Virus Phone Scam Landing Jan 13 M1"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<title>SECURITY WARNING"; fast_pattern; content:"0x0000007E"; nocase; distance:0; content:"0xFFFFFFFFFC000000047"; nocase; distance:0; content:"Serious security threat"; nocase; distance:0; content:"msg.mp3"; nocase; classtype:social-engineering; sid:2022364; rev:5; metadata:created_at 2016_01_14, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_05;)