ET MALWARE TA444 Related JS Activity Sending Windows System Process Information (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:!"|2e|";
http.request_body;
content:"|7b 22 75 69 64 22 3a 22|"; startswith;
content:"|22 2c 20 22 6d 69 64 22 3a 22|"; within:23; fast_pattern;
content:"|22 2c 20 22 64 61 74 61 22 3a 22 7c|"; within:36;
content:"|7c 53 79 73 74 65 6d 7c|"; distance:0;
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE TA444 Related JS Activity Sending Windows System Process Information (POST) · Suricata
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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 TA444 Related JS Activity Sending Windows System Process Information (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:!"|2e|";
    http.request_body;
    content:"|7b 22 75 69 64 22 3a 22|"; startswith;
    content:"|22 2c 20 22 6d 69 64 22 3a 22|"; within:23; fast_pattern;
    content:"|22 2c 20 22 64 61 74 61 22 3a 22 7c|"; within:36;
    content:"|7c 53 79 73 74 65 6d 7c|"; distance:0;
    http.header_names;
    content:!"Referer";
    reference:md5,31af7ca58c844bdc40d367ff91ee55f7;
    classtype:trojan-activity;
    sid:2049281; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_11_22, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_22;
    target:src_ip;
)

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