ET MALWARE Cobalt Strike Related Activity (GET)

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET /api/v2/login HTTP/1.1"; fast_pattern;
http.referer;
content:"code.jquery.com";
http.cookie;
content:"__cfduid="; startswith;
pcre:"/^[A-Za-z0-9-_]{171}$/R";
Raw source ET MALWARE Cobalt Strike Related Activity (GET) · Suricata
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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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike Related Activity (GET)";
    flow:established,to_server;
    http.request_line;
    content:"GET /api/v2/login HTTP/1.1"; fast_pattern;
    http.referer;
    content:"code.jquery.com";
    http.cookie;
    content:"__cfduid="; startswith;
    pcre:"/^[A-Za-z0-9-_]{171}$/R";
    reference:url,isc.sans.edu/diary/rss/28824;
    reference:md5,0842c91746d69e9c14e51425d1ceca3f;
    classtype:trojan-activity;
    sid:2037745; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_07_12, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2022_07_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

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