alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Fake AV Phone Scam Landing Apr 1"; flow:established,to_client; file_data; content:"<title>SYSTEM ERROR WARNING"; fast_pattern; nocase; content:"function loadNumber"; nocase; distance:0; content:"campaign_key:"; nocase; distance:0; classtype:social-engineering; sid:2022695; rev:3; metadata:created_at 2016_04_01, confidence High, signature_severity Minor, updated_at 2019_08_16;)