ET MALWARE Cobalt Strike Malleable C2 (Wordpress Profile)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/admin"; bsize:6;
http.cookie;
content:"wordpress_"; startswith;
pcre:"/^[a-z0-9]{32}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
http.accept_lang;
content:"en-GB|3b|q=0.9,|20|*|3b|q=0.7"; fast_pattern;
Raw source ET MALWARE Cobalt Strike Malleable C2 (Wordpress Profile) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike Malleable C2 (Wordpress Profile)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/admin"; bsize:6;
    http.cookie;
    content:"wordpress_"; startswith;
    pcre:"/^[a-z0-9]{32}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
    http.accept_lang;
    content:"en-GB|3b|q=0.9,|20|*|3b|q=0.7"; fast_pattern;
    reference:md5,e75bef518faea38765cb91b71ba6c8a8;
    classtype:command-and-control;
    sid:2032755; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_02_16, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2021_02_16, reviewed_at 2023_08_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.