ET MALWARE Win32/Filecoder.OJC CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/ap.php"; endswith;
http.header_names;
content:!"Referer";
http.request_body;
content:"user|3d|"; startswith;
content:"TargetID|3d|";
pcre:"/^[A-F0-9]{24}/R";
content:"SystemInformation|3d|Windows%20"; fast_pattern;
content:"max_size_of_file|3d|";
content:"size_of_hdd|3d|";
Raw source ET MALWARE Win32/Filecoder.OJC CnC Checkin · 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/Filecoder.OJC CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/ap.php"; endswith;
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"user|3d|"; startswith;
    content:"TargetID|3d|";
    pcre:"/^[A-F0-9]{24}/R";
    content:"SystemInformation|3d|Windows%20"; fast_pattern;
    content:"max_size_of_file|3d|";
    content:"size_of_hdd|3d|";
    reference:md5,dea5df7e709f087f2c1d03046f38efe7;
    classtype:trojan-activity;
    sid:2039815; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_11_21, deployment Perimeter, malware_family Win32_Filecoder_OJC, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_21, reviewed_at 2025_07_14;
)

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