ET MALWARE CHAOS RAT/AlfaC2 CnC Server Status Check

Query · suricata

flow:established,to_server;
http.uri; bsize:7;
content:"/health";
http.user_agent;
content:"Go-http-client/"; startswith;
http.content_type; bsize:16;
content:"application/json";
http.cookie;
content:"jwt="; startswith;
content:".eyJhdXRob3JpemVkIj"; fast_pattern; distance:0;
content:!"|3b|"; distance:0;
target:src_ip;
Raw source ET MALWARE CHAOS RAT/AlfaC2 CnC Server Status Check · 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 CHAOS RAT/AlfaC2 CnC Server Status Check";
    flow:established,to_server;
    http.uri; bsize:7;
    content:"/health";
    http.user_agent;
    content:"Go-http-client/"; startswith;
    http.content_type; bsize:16;
    content:"application/json";
    http.cookie;
    content:"jwt="; startswith;
    content:".eyJhdXRob3JpemVkIj"; fast_pattern; distance:0;
    content:!"|3b|"; distance:0;
    reference:md5,d0ea84204096109f18a2201fae1c4f30;
    reference:url,github.com/tiagorlampert/CHAOS;
    classtype:command-and-control;
    sid:2046873; rev:1;
    metadata:attack_target Client_and_Server, created_at 2023_07_20, deployment Perimeter, malware_family CHAOS, performance_impact Low, confidence Medium, signature_severity Critical, tag RemoteAccessTool, updated_at 2023_11_27;
    target:src_ip;
)

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.