ET HUNTING Possible Machine GUID Observed in HTTP POST

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"&machineId="; fast_pattern;
pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})/R";
Raw source ET HUNTING Possible Machine GUID Observed in HTTP 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 HUNTING Possible Machine GUID Observed in HTTP POST";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"&machineId="; fast_pattern;
    pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})/R";
    classtype:misc-activity;
    sid:2054968; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_06, deployment Perimeter, deployment SSLDecrypt, confidence Low, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_07;
)

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