ET MALWARE Screenshot Exfiltration via Discord Webhook (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/api/webhooks/"; startswith;
http.host;
content:"discord.com"; endswith;
http.request_body;
content:"|7b|"; startswith;
content:"|22|file|22 3a|"; distance:0;
content:"|22|iVBORw0KGgoAAAANSUhEUg"; within:27; fast_pattern;
target:src_ip;
Raw source ET MALWARE Screenshot Exfiltration via Discord Webhook (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 Screenshot Exfiltration via Discord Webhook (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/webhooks/"; startswith;
    http.host;
    content:"discord.com"; endswith;
    http.request_body;
    content:"|7b|"; startswith;
    content:"|22|file|22 3a|"; distance:0;
    content:"|22|iVBORw0KGgoAAAANSUhEUg"; within:27; fast_pattern;
    reference:md5,38b4f8e9a53eede69f4339af1adb55b0;
    classtype:trojan-activity;
    sid:2060517; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_03_03, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, updated_at 2025_03_03, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1567, mitre_technique_name Exfiltration_Over_Web_Service;
    target:src_ip;
)

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