alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed PeerBlight Domain (api .qtss .cc) in TLS SNI"; flow:established,to_server; tls.sni; bsize:11; content:"api.qtss.cc"; fast_pattern; reference:url,www.huntress.com/blog/peerblight-linux-backdoor-exploits-react2shell; classtype:trojan-activity; sid:2066240; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Client_and_Server, created_at 2025_12_10, deployment Perimeter, malware_family Sliver, malware_family XMRig, malware_family CowTunnel, malware_family ZinFoq, malware_family PeerBlight, performance_impact Low, confidence High, signature_severity Major, updated_at 2025_12_10, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)