alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Delf HTTP Checkin (1)"; flow:established,to_server; content:"/mydown.asp?"; nocase; http_uri; content:"reg="; nocase; http_uri; content:"&ver="; nocase; http_uri; content:"&tgid="; nocase; http_uri; content:"&address="; nocase; http_uri; content:"&mydo="; nocase; http_uri; content:"&flag="; nocase; http_uri; classtype:command-and-control; sid:2007838; rev:5; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_07_26;)