ET INFO Microsoft OAuth 2.0 Device Auth Activity M1 (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri; bsize:25;
content:"/common/oauth2/deviceauth"; fast_pattern;
http.host;
content:"login.microsoftonline.com";
Raw source ET INFO Microsoft OAuth 2.0 Device Auth Activity M1 (GET) · 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 INFO Microsoft OAuth 2.0 Device Auth Activity M1 (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri; bsize:25;
    content:"/common/oauth2/deviceauth"; fast_pattern;
    http.host;
    content:"login.microsoftonline.com";
    reference:url,learn.microsoft.com/en-us/entra/identity-platform/v2-oauth2-device-code#device-authorization-request;
    classtype:misc-activity;
    sid:2060049; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_02_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2025_02_12;
)

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