alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Possible MeltDown PoC Download In Progress"; flow:established,from_server; flowbits:isset,ET.http.binary; file_data; content:"|57 53 41 50 41 51|"; content:"|0F AE F0|"; distance:50; within:53; content:"|0F AE|"; distance:15; within:12; pcre:"/^[\x30-\x3f\x7D]/Rs"; content:"|0F AE F0 0F 31|"; distance:45; within:25; content:"|0F AE F0 0F 31|"; distance:17; within:12; reference:cve,2017-5754; classtype:attempted-admin; sid:2025195; rev:2; metadata:attack_target Client_Endpoint, created_at 2018_01_10, cve CVE_2017_5754, deployment Perimeter, malware_family MeltDown_Exploit, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_07_26;)