alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Common Spambot HTTP Checkin"; flow:established,to_server; content:"os="; http_uri; content:"&user="; http_uri; content:"&status="; http_uri; content:"&uptime="; http_uri; content:"&cmd="; http_uri; classtype:command-and-control; sid:2008261; rev:4; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_07_26;)