alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO DLL File Download Request via Discord"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/attachments/"; depth:13; content:".dll"; http.host; content:".discordapp.com"; endswith; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; classtype:misc-activity; sid:2049230; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_16, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_16;)