ET MALWARE Win32/Neshta Variant Related Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/api/mytest"; bsize:11;
http.user_agent;
content:"NZT|20|1.0"; bsize:7; fast_pattern;
http.request_body;
base64_decode:bytes 20, offset 0;
base64_data;
content:"|7b 22|username|22 3a 22|";
target:src_ip;
Raw source ET MALWARE Win32/Neshta Variant Related Activity (POST) · 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/Neshta Variant Related Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/mytest"; bsize:11;
    http.user_agent;
    content:"NZT|20|1.0"; bsize:7; fast_pattern;
    http.request_body;
    base64_decode:bytes 20, offset 0;
    base64_data;
    content:"|7b 22|username|22 3a 22|";
    reference:md5,6767f8292814a48db7fa79e8572a324f;
    classtype:trojan-activity;
    sid:2052280; rev:1;
    metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2024_04_29, deployment Perimeter, malware_family Win32_Neshta, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29;
    target:src_ip;
)

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