alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Tech Support Scam Landing M1 2019-04-15"; flow:established,from_server; http.stat_code; content:"200"; file.data; content:"alert|28 22|Windows|20|Firewall|20|has|20|detected|20|that|20|your|20|Windows"; fast_pattern; content:"system|20|files|20|are|20|automatically|20|deleted"; within:200; content:"Please|20|follow|20|the|20|instructions"; within:200; classtype:social-engineering; sid:2027197; rev:4; metadata:created_at 2019_04_15, confidence High, signature_severity Major, tag Tech_Support_Scam, tag Malvertising, updated_at 2020_11_19;)