Versions (3)
Version DetailsCurrent
Rev: 2 • Aug 28, 2023, 12:00 PMET HUNTING Base64 Encoded zip-compressed File in HTML Body (Mime Type)
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Base64 Encoded zip-compressed File in HTML Body (Mime Type)"; flow:established,to_client; http.response_body; content:"|3c|html"; content:"data|3a|application|2f|x|2d|zip|2d|compressed|3b|base64|2c|"; fast_pattern; reference:url,urlscan.io/result/98d7e72b-67b8-4d7c-9735-c27525b0a550/#transactions; classtype:misc-activity; sid:2047787; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_08_28, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, tag HTML_Smuggling, updated_at 2023_10_06, reviewed_at 2023_10_06, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information; target:dest_ip;)
Aug 28, 2023, 12:00 PM
Oct 6, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-hunting.rules