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66.132.172.136 has a threat confidence score of 81%. This IP address from United States (AS398324, Censys, Inc.) has been observed in 23 honeypot sessions targeting HTTPS, RDP, SSH, SMTP, DOCKER and 2 other protocols. First observed on March 19, 2026, most recently active March 21, 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
SMTP interaction identified as an internet-wide scanning probe originating from Censys infrastructure. The client announces itself via EHLO www.censys.io and issues a STARTTLS request to verify TLS upgrade support and collect service capability metadata. This pattern reflects automated reconnaissance and exposure mapping rather than direct exploitation, but still represents active external probing of the SMTP service.