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139.59.251.66 has a threat confidence score of 83%. This IP address from Singapore (AS14061, DigitalOcean, LLC) has been observed in 53 honeypot sessions targeting RDP protocols. First observed on April 7, 2026, most recently active April 8, 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