alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Fake AV Phone Scam Landing Jan 26 2016"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"Critical Error"; nocase; content:"WINDOWS VIRUS"; nocase; content:".net framework file missing"; nocase; fast_pattern; content:"contact Microsoft Support"; nocase; distance:0; classtype:social-engineering; sid:2022409; rev:5; metadata:created_at 2016_01_26, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_05;)