alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Silon Encrypted Data POST to C&C"; flow:established,to_server; http.uri; content:".php?i="; fast_pattern; nocase; content:"&k="; nocase; reference:url,www.trusteer.com/webform/w32silon-malware-analysis; classtype:command-and-control; sid:2010201; rev:4; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_03_10;)