alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Tigger.a/Syzor Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/track.cgi"; fast_pattern; http.request_body; content:"u="; startswith; content:"&t="; content:"&b="; content:"&v="; content:"&f="; classtype:command-and-control; sid:2009347; rev:7; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_08;)