alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Fake Virus Phone Scam JS Landing Nov 4"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"application/x-javascript"; startswith; http.response_header; header_lowercase; content:"content-encoding|3a 20|gzip"; startswith; file.data; content:"tfnnumber"; fast_pattern; content:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; distance:0; content:"msgencoded"; content:"returnmsgencoded"; distance:0; content:"Base64"; pcre:"/^\s*?\.\s*?decode\s*?\(\s*?msgencoded\s*?\)\s*?\.\s*?replace/Rsi"; classtype:social-engineering; sid:2022031; rev:7; metadata:created_at 2015_11_04, confidence High, signature_severity Minor, updated_at 2024_04_27;)