ET MALWARE Win32/Cryptbotv2 CnC Activity (POST) M4

Query · suricata

flow:established,to_server;
urilen:<15;
http.method;
content:"POST";
http.uri;
content:"/upload.php"; endswith; fast_pattern;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|"; nocase;
http.request_body;
content:"filename=|22|";
content:"|2e|bin|22 0d 0a|";
Raw source ET MALWARE Win32/Cryptbotv2 CnC Activity (POST) M4 · 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/Cryptbotv2 CnC Activity (POST) M4";
    flow:established,to_server;
    urilen:<15;
    http.method;
    content:"POST";
    http.uri;
    content:"/upload.php"; endswith; fast_pattern;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|"; nocase;
    http.request_body;
    content:"filename=|22|";
    content:"|2e|bin|22 0d 0a|";
    reference:url,community.emergingthreats.net/t/cryptbot-stealer-update-on-rules/790/3;
    classtype:trojan-activity;
    sid:2054350; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_07_05, deployment Perimeter, malware_family Cryptbot, performance_impact Moderate, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_05;
)

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