ET MALWARE Win32/Cryptbot CnC Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/zip.php"; bsize:8; fast_pattern;
http.header_names;
content:"|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; startswith;
content:!"Referer";
http.request_body;
content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|";
content:"|2e|zip|22|"; distance:0;
Raw source ET MALWARE Win32/Cryptbot CnC 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/Cryptbot CnC Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/zip.php"; bsize:8; fast_pattern;
    http.header_names;
    content:"|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; startswith;
    content:!"Referer";
    http.request_body;
    content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|";
    content:"|2e|zip|22|"; distance:0;
    reference:url,app.any.run/tasks/8e3e870c-04a7-41eb-b52d-3a023185a395/;
    classtype:trojan-activity;
    sid:2046886; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_07_24, deployment Perimeter, malware_family Cryptbot, confidence High, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_24;
)

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