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159.100.19.39 has a threat confidence score of 81%. This IP address from Germany (AS214036, Ultahost, Inc.) has been observed in 21 honeypot sessions targeting RDP protocols. First observed on March 22, 2026, most recently active March 22, 2026.
Identifies RDP clients attempting authentication using the legacy RDP security mode where credentials are exchanged through the older RDP security layer instead of Network Level Authentication (NLA). This indicates the client negotiated legacy plaintext authentication during the RDP security handshake