alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING SUSPICIOUS Excel Add-in Download M1"; flow:to_server,established; http.uri; content:".xla"; nocase; endswith; reference:url,blogs.mcafee.com/mcafee-labs/patch-now-simple-office-protected-view-bypass-could-have-big-impact/; classtype:bad-unknown; sid:2022965; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_07_13, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2020_07_17;)