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121.37.187.2 has a threat confidence score of 94%. This IP address from China (AS55990, Huawei Cloud Service data center) has been observed in 53 honeypot sessions targeting RDP protocols. First observed on March 31, 2026, most recently active April 1, 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