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191.191.36.33 has a threat confidence score of 74%. This IP address from Brazil (AS28573, Claro NXT Telecomunicacoes Ltda) has been observed in 12 honeypot sessions targeting RDP protocols. First observed on April 16, 2026, most recently active April 17, 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