alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING WebDAV Retrieving .zip"; flow:established,to_server; http.method; content:"PROPFIND"; http.uri; content:".zip"; endswith; http.user_agent; content:"Microsoft-WebDAV-MiniRedir/"; startswith; fast_pattern; http.header_names; content:!"Referer"; classtype:bad-unknown; sid:2049440; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_13, reviewed_at 2024_10_14;)