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;)