alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET EXPLOIT_KIT SunDown EK CVE-2015-0016 Sep 22 2016 (b643)";
flow:established,from_server;
file_data;
content:"9xb4GwTUbwUQoyD09AFIox7g9y6";
flowbits:set,SunDown.EK;
classtype:exploit-kit;
sid:2023279; rev:3;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_09_22, cve CVE_2015_0016, malware_family SunDown, confidence High, signature_severity Major, tag Exploit_Kit_Sundown, tag CISA_KEV, updated_at 2020_08_19;
)