alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Request for .bin with BITS/ User-Agent"; flow:established,to_server; http.uri; content:".bin"; endswith; http.user_agent; content:"Microsoft BITS/"; depth:15; fast_pattern; http.host; content:!"microsoft.com"; content:!"pdfcomplete.com"; content:!"mymitchell.com"; content:!"azureedge.net"; http.accept; content:"*/*"; depth:3; endswith; http.header_names; content:!"Referer"; classtype:bad-unknown; sid:2024420; rev:10; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Microsoft_Word, attack_target Client_Endpoint, created_at 2017_06_23, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2020_09_16;)