alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Mokes CnC Keep-Alive"; flow:established,to_server; urilen:3; http.method; content:"GET"; http.uri; content:"/v1"; startswith; fast_pattern; http.header_names; to_lowercase; content:"|0d 0a|accept|0d 0a|"; content:"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; threshold:type both, count 9, seconds 60, track by_src; reference:url,securelist.com/blog/research/73503/from-linux-to-windows-new-family-of-cross-platform-desktop-backdoors-discovered/; classtype:command-and-control; sid:2022477; rev:6; metadata:created_at 2016_02_01, signature_severity Major, updated_at 2024_05_04;)