ET MALWARE Win32/Khaosz.A!MTB Checkin - Command Retrieval

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/command?address="; startswith; fast_pattern;
pcre:"/^[A-Za-z0-9+/=]{24}$/R";
http.user_agent;
content:"Go-http-client/"; startswith;
http.cookie;
content:"jwt="; startswith;
threshold:type limit, seconds 120, count 1, track by_dst;
Raw source ET MALWARE Win32/Khaosz.A!MTB Checkin - Command Retrieval · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Khaosz.A!MTB Checkin - Command Retrieval";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/command?address="; startswith; fast_pattern;
    pcre:"/^[A-Za-z0-9+/=]{24}$/R";
    http.user_agent;
    content:"Go-http-client/"; startswith;
    http.cookie;
    content:"jwt="; startswith;
    threshold:type limit, seconds 120, count 1, track by_dst;
    reference:md5,94803cf635cf08b96ea3de6b301563b5;
    classtype:trojan-activity;
    sid:2042890; rev:1;
    metadata:affected_product Linux, attack_target Client_and_Server, created_at 2022_12_14, deployment Perimeter, malware_family Win32_Khaosz_A_MTB, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_14;
)

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