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171.39.56.57 has a threat confidence score of 47%. This IP address from China (AS4837, CHINA UNICOM China169 Backbone) has been observed in 2 honeypot sessions targeting RDP protocols. First observed on April 18, 2026, most recently active April 19, 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