alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA505 P2P CnC Checkin"; flow:established,to_server; http.uri; content:"/c/p1/dnsc.php?n="; fast_pattern; reference:url,research.nccgroup.com/2021/12/01/tracking-a-p2p-network-related-with-ta505/; classtype:command-and-control; sid:2034584; rev:1; metadata:created_at 2021_12_06, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_06;)