alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Tech Support Scam - Windows Firewall M4 2021-08-17"; flow:established,from_server; http.stat_code; content:"200"; file.data; content:"i>|20|Looking|20|for|20|updates<"; fast_pattern; content:"i>|20|Scan|20|memory<"; content:"<span>Windows|20|registry|20|scan"; classtype:social-engineering; sid:2034206; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_17, deployment Perimeter, confidence High, signature_severity Minor, tag SocEng, updated_at 2021_10_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)