alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO AutoIt User-Agent Downloading ZIP"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".zip"; nocase; endswith; http.user_agent; content:"AutoIt"; depth:6; endswith; fast_pattern; http.header_names; content:!"Referer"; classtype:misc-activity; sid:2027360; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_05_17, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_20;)