alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET WEB_CLIENT Fake Virus Phone Scam Redirector Oct 19 M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/scan"; startswith; fast_pattern; pcre:"/^\/scan[A-Z][a-z]?\/?$/"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; classtype:social-engineering; sid:2021967; rev:4; metadata:created_at 2015_10_19, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_02;)