alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Fake Virus Phone Scam Audio Oct 30"; flow:established,from_server; file_data; content:"<audio"; content:"gp-msg.mp3"; distance:0; nocase; fast_pattern; content:"audio/mpeg"; distance:0; nocase; content:"</audio>"; distance:0; nocase; classtype:social-engineering; sid:2022012; rev:3; metadata:created_at 2015_10_31, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_16;)