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

Remote client performs MongoDB service validation and environment fingerprinting by first initiating a wire-protocol handshake (ismaster / hello) followed by execution of the buildInfo command against the admin database. This sequence indicates targeted reconnaissance to determine server role, software version, build characteristics, and platform details. Such activity is commonly associated with automated scanning frameworks and pre-exploitation tooling used to assess exposure and identify version-specific vulnerabilities prior to authentication attempts or database enumeration

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.