ET MALWARE [CIS] Gootloader C2 Activity - Windows Server 2016 - barefootinc.com[.]au

alert tls $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE [CIS] Gootloader C2 Activity - Windows Server 2016 - barefootinc.com[.]au";
    flow:established,to_server;
    ja3.hash;
    content:"ae76f123158d52fd84c2c313c0c724ac";
    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:2058287; rev:1;
    metadata:affected_product Windows_Server_2016, 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;
)