alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE nspps Backdoor CnC Activity"; flow:established,to_server; http.header; content:"|0d 0a|Arch|3a 20|"; content:"|0d 0a|Cores|3a 20|"; content:"|0d 0a|Mem|3a 20|"; content:"|0d 0a|Os|3a 20|"; content:"|0d 0a|Osname|3a 20|"; content:"|0d 0a|Osversion|3a 20|"; fast_pattern; content:"|0d 0a|Root|3a 20|"; content:"|0d 0a|Uuid|3a 20|"; content:"|0d 0a|Version|3a 20|"; reference:url,ironnet.com/blog/malware-analysis-nspps-a-go-rat-backdoor/; reference:md5,435716b4f56cf94fdb7f6085dced41e5; classtype:command-and-control; sid:2030108; rev:1; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2020_05_05, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_05_05;)