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Rev: 1 • Nov 15, 2023, 12:00 PMET HUNTING Suspicious HTTP Server Value in Response (Apache.)
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Suspicious HTTP Server Value in Response (Apache.)"; flow:established,to_client; http.header; content:"Server|3a 20|Apache|2e 0d 0a|"; fast_pattern; threshold:type limit,seconds 300,count 1,track by_src; reference:url,blog.fox-it.com/2023/11/15/the-spelling-police-searching-for-malicious-http-servers-by-identifying-typos-in-http-responses; classtype:misc-activity; sid:2049206; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_11_15, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_15;)
Nov 15, 2023, 12:00 PM
Nov 15, 2023, 12:00 PM
Nov 15, 2023, 11:00 PM
Aug 18, 2025, 8:35 PM
rules/emerging-hunting.rules