ET RETIRED Blister Loader Cobalt Strike C2 Profile M17

Query · suricata

flow:established,to_server;
http.method;
pcre:"/^(GE|POS)T$/";
http.uri;
content:"/apply/admin_/"; startswith; fast_pattern;
pcre:"/^[A-Z0-9]{8,16}/R";
target:src_ip;
Raw source ET RETIRED Blister Loader Cobalt Strike C2 Profile M17 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Blister Loader Cobalt Strike C2 Profile M17";
    flow:established,to_server;
    http.method;
    pcre:"/^(GE|POS)T$/";
    http.uri;
    content:"/apply/admin_/"; startswith; fast_pattern;
    pcre:"/^[A-Z0-9]{8,16}/R";
    reference:url,blog.fox-it.com/2023/11/01/popping-blisters-for-research-an-overview-of-past-payloads-and-exploring-recent-developments/;
    classtype:trojan-activity;
    sid:2049991; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2024_01_10, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family Cobalt_Strike, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_03, reviewed_at 2024_10_03;
    target:src_ip;
)

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