exchange-owa-attack

You can extract Active Directory domain, NetBIOS, and computer names from an OWA NTLM challenge by decoding the NTLM Type-2 authentication messages exchanged during HTTP probing. This reveals sensitive AD metadata without requiring valid credentials.

Fingerprinting Exchange server versions involves probing HTTP headers and specific endpoints like ECP, EWS, and Autodiscover to determine service availability and frontend server configurations. This process detects exact server versions and active mail endpoints.

Yes, you need curl and python3 along with standard network utilities to perform non-intrusive reconnaissance on mail subdomains. These dependencies facilitate probing HTTP headers and decoding NTLM authentication challenges for Active Directory metadata extraction.

Assessing password spray resilience on an OWA server involves evaluating the exposed authentication surfaces and identifying misconfigurations in hybrid ADFS or Office 365 environments. This non-intrusive reconnaissance checks susceptibility without actively spraying passwords.

NTLM Type-2 information disclosure on Exchange servers works by sending a crafted authentication request that prompts the server to return a challenge message containing internal Active Directory domain, NetBIOS, and computer name details in its headers.

Probing HTTP headers for Exchange server reconnaissance is limited to detecting exposed service availability, endpoint configurations, and NTLM challenge metadata. It cannot authenticate users or access internal mailbox data without valid Active Directory credentials.