alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SHELLCODE Hex Obfuscated JavaScript NOP SLED"; flow:established,to_client; file.data; content:"|5C|x90|5C|x90|5C|x90|5C|x90"; nocase; fast_pattern; reference:url,www.darkreading.com/security/vulnerabilities/221901428/index.html; classtype:shellcode-detect; sid:2013271; rev:4; metadata:created_at 2011_07_14, confidence High, signature_severity Major, tag possible_exploitation, updated_at 2024_04_09, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)