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35.199.91.184 has a very high threat confidence level of 96%, originating from São Paulo, Brazil, on the Google LLC network (396982). It has been observed across 301 sessions targeting RDP, First observed on March 8, 2026, most recently active March 9, 2026.
Identifies RDP clients attempting authentication using Network Level Authentication (NLA) with the NTLM challenge-response protocol. This occurs during the CredSSP negotiation phase before a remote desktop session is established and indicates an active credential authentication attempt against the RDP service