alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Hades APT Downloader Attempting to Retrieve Stage 2 Payload"; flow:established,to_server; urilen:12; http.method; content:"GET"; http.uri; content:"/check/index"; fast_pattern; http.connection; content:"Keep-Alive"; http.header_names; content:"Host|0d 0a|Connection|0d 0a 0d 0a|"; content:!"Referer"; content:!"User-Agent"; content:!"Accept"; content:!"Cache"; reference:url,research.checkpoint.com/new-strain-of-olympic-destroyer-droppers/; classtype:targeted-activity; sid:2026619; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Downloader, tag Hades, updated_at 2020_08_27;)