Versions (5)
Version DetailsCurrent
Rev: 6 • Oct 8, 2013, 12:00 PMET HUNTING Obfuscated fromCharCode
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Obfuscated fromCharCode"; flow:established,from_server; file_data; content:"|27|f"; nocase; content:!"romCharcode"; nocase; within:11; pcre:"/^(?:\x27\s*?\+\s*?\x27)?r(?:\x27\s*?\+\s*?\x27)?o(?:\x27\s*?\+\s*?\x27)?m(?:\x27\s*?\+\s*?\x27)?C(?:\x27\s*?\+\s*?\x27)?h(?:\x27\s*?\+\s*?\x27)?a(?:\x27\s*?\+\s*?\x27)?r(?:\x27\s*?\+\s*?\x27)?c(?:\x27\s*?\+\s*?\x27)?o(?:\x27\s*?\+\s*?\x27)?d(?:\x27\s*?\+\s*?\x27)?e/Ri"; classtype:bad-unknown; sid:2017566; rev:6; metadata:created_at 2013_10_08, former_category INFO, confidence Medium, signature_severity Minor, updated_at 2024_11_29, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)
Oct 8, 2013, 12:00 PM
Nov 29, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-hunting.rules