ET RETIRED CopyKittens Cobalt Strike DNS Lookup (cloudflare-analyse . com)

Query · suricata

threshold:type limit, track by_src, count 1, seconds 60;
dns.query;
content:"cloudflare.analyse.com"; depth:22; nocase; endswith; fast_pattern;
Raw source ET RETIRED CopyKittens Cobalt Strike DNS Lookup (cloudflare-analyse . com) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert dns $HOME_NET any -> any any (
    msg:"ET RETIRED CopyKittens Cobalt Strike DNS Lookup (cloudflare-analyse . com)";
    threshold:type limit, track by_src, count 1, seconds 60;
    dns.query;
    content:"cloudflare.analyse.com"; depth:22; nocase; endswith; fast_pattern;
    reference:url,www.clearskysec.com/wp-content/uploads/2017/07/Operation_Wilted_Tulip.pdf;
    reference:md5,752240cddda5acb5e8d026cef82e2b54;
    classtype:targeted-activity;
    sid:2024497; rev:7;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_25, deployment Perimeter, former_category MALWARE, malware_family Cobalt_Strike, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_09_16, reviewed_at 2024_09_16;
)

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