alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Common Spambot HTTP Checkin"; flow:established,to_server; http.uri; content:"os="; content:"&user="; content:"&status="; content:"&uptime="; fast_pattern; content:"&cmd="; classtype:command-and-control; sid:2008261; rev:5; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_03_16;)