alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Fake Virus Phone Scam Landing Mar 9 M2"; flow:to_client,established; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"function myFunction"; nocase; fast_pattern; content:"MICROSOFT COMPUTER HAS BEEN BLOCKED"; nocase; distance:0; content:"Windows System Alert"; nocase; distance:0; content:"Contact Microsoft"; nocase; distance:0; classtype:social-engineering; sid:2022608; rev:4; metadata:created_at 2016_03_09, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_01;)