ET HUNTING Possible cs2nginx Proxy Redirect

Query · suricata

flow:established,to_client;
http.stat_code;
content:"302";
http.header;
content:"|0d 0a|Server|3a 20|Server|0d 0a|Referrer-Policy|3a 20|no-referrer|0d 0a|"; fast_pattern; endswith;
Raw source ET HUNTING Possible cs2nginx Proxy Redirect · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Possible cs2nginx Proxy Redirect";
    flow:established,to_client;
    http.stat_code;
    content:"302";
    http.header;
    content:"|0d 0a|Server|3a 20|Server|0d 0a|Referrer-Policy|3a 20|no-referrer|0d 0a|"; fast_pattern; endswith;
    reference:url,github.com/threatexpress/cs2modrewrite/blob/d6516e153dfd2a19cc3fba6c26b948e2b0933708/cs2nginx.py;
    reference:url,www.sekoia.io/en/nobeliums-envyscout-infection-chain-goes-in-the-registry-targeting-embassies/;
    classtype:bad-unknown;
    sid:2034874; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2022_01_10, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_05;
)

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