alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE Obfuscated JS - Possible URL Encoded JS Inbound"; flow:established,from_server; file_data; content:"<form"; nocase; content:"button"; nocase; content:"CollectGarbage("; nocase; fast_pattern; content:".location"; nocase; pcre:"/^[\r\n\s]*=[\r\n\s]*unescape\(\s*[\x22\x27][\\%]u/Ri"; reference:url,eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/; classtype:misc-activity; sid:2016132; rev:5; metadata:created_at 2012_12_30, confidence Medium, signature_severity Minor, updated_at 2022_06_10, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)