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43.133.77.137 has a threat confidence score of 95%. This IP address from South Korea (AS132203, Tencent Building, Kejizhongyi Avenue) has been observed in 124 honeypot sessions targeting RDP protocols. First observed on March 21, 2026, most recently active March 21, 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