alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Farfli HTTP Checkin Activity"; flow:to_server,established; http.uri; content:"/getmac.asp?x="; content:"&y="; pcre:"/x=[a-f0-9]{2}-[a-f0-9]{2}-[a-f0-9]{2}-[a-f0-9]{2}-[a-f0-9]{2}-[a-f0-9]{2}/i"; reference:url,www.virustotal.com/analisis/3b532a7bf7850483882024652f6c8a8b; classtype:command-and-control; sid:2009215; rev:7; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2020_09_02;)