alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [CIS] GootLoader C2 Activity - Windows 11 - barefootinc.com[.]au"; flow:established,to_server; ja3.hash; content:"6a5d235ee78c6aede6a61448b4e9ff1e"; tls.sni; bsize:18; content:"barefootinc.com.au"; nocase; startswith; fast_pattern; threshold:type limit, track by_src, seconds 3600, count 1; classtype:domain-c2; sid:2058288; rev:1; metadata:affected_product Windows_11, attack_target Client_Endpoint, created_at 2024_12_15, deployment Perimeter, malware_family GootLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:dest_ip;)