alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE Obfuscated Eval String 4"; flow:established,from_server; file_data; content:"|22|e|22|+|22|v|22|+|22|a|22|+|22|l|22|"; classtype:bad-unknown; sid:2017209; rev:3; metadata:created_at 2013_07_27, deployment alert_only, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_19, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)