alert dns $HOME_NET any -> any any (msg:"ET INFO Ninja/NinjaOne RMM Domain in DNS Lookup (ninjarmm .com)"; dns.query; dotprefix; content:".ninjarmm.com"; nocase; endswith; reference:url,support.netsweeper.com/hc/en-us/articles/31569767403668-How-to-Allow-Ninja-RMM-Software-Through-Netsweeper; classtype:misc-activity; sid:2066840; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Adobe_Reader, attack_target Client_and_Server, created_at 2026_01_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2026_01_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1219, mitre_technique_name Remote_Access_Software;)