alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Likely FakeAV/Fakeinit/FraudLoad Checkin"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"cgi-bin/download.pl?code="; nocase; pcre:"/^\d+$/Ri"; http.header_names; content:!"Referer|0d 0a|"; nocase; reference:md5,f5e907a11831c757a94cde9257b3574c; classtype:command-and-control; sid:2010627; rev:8; metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, updated_at 2020_04_21;)