alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING [TW] Likely Hex Executable String"; flow:to_client,established; file_data; content:"4D5A"; content:"63616E6E6F74"; fast_pattern; distance:178; within:12; content:"72756E"; distance:8; within:6; content:"444F53"; distance:8; within:6; classtype:misc-activity; sid:2035769; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_06, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_06, reviewed_at 2024_12_02;)