alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET EXPLOIT Firefox 0-day used against TOR browser Nov 29 2016 M1";
flow:established,from_server;
file_data;
content:"|66 69 6e 64 50 6f 70 52 65 74|"; nocase;
content:"|66 69 6e 64 53 74 61 63 6b 50 69 76 6f 74|"; nocase;
content:"|56 69 72 74 75 61 6c 41 6c 6c 6f 63|"; nocase;
content:"|72 6f 70 43 68 61 69 6e|"; nocase;
content:"|6b 65 72 6e 65 6c 33 32 2e 64 6c 6c|"; nocase;
reference:url,arstechnica.com/security/2016/11/firefox-0day-used-against-tor-users-almost-identical-to-one-fbi-used-in-2013/;
classtype:attempted-admin;
sid:2023559; rev:2;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Firefox, attack_target Client_Endpoint, created_at 2016_11_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;
)