ET MALWARE Cobalt Strike Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/field-keywords/"; fast_pattern;
http.cookie;
content:"PREF=ID="; startswith;
http.user_agent;
content:"_";
Raw source ET MALWARE Cobalt Strike Activity (GET) · 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 Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/field-keywords/"; fast_pattern;
    http.cookie;
    content:"PREF=ID="; startswith;
    http.user_agent;
    content:"_";
    reference:url,cert.gov.ua/article/619229;
    reference:url,twitter.com/h2jazi/status/1544368077286039552;
    reference:md5,28f18fc7d9a0ab530742c2314cbd5c32;
    classtype:trojan-activity;
    sid:2037713; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_07_07, deployment Perimeter, deployment SSLDecrypt, malware_family TA471, malware_family UNC2589, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_07;
)

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.