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Merge pull request #998 from sud0Ru/patch-1

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Adding new way for domain users enumeration without authentication
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SirBroccoli 2025-01-22 13:09:10 +01:00 committed by GitHub
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src/windows-hardening/active-directory-methodology/README.md
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@ -78,6 +78,7 @@ If you just have access to an AD environment but you don't have any credentials/
- **Anonymous SMB/LDAP enum:** Check the [**pentesting SMB**](../../network-services-pentesting/pentesting-smb/index.html) and [**pentesting LDAP**](../../network-services-pentesting/pentesting-ldap.md) pages.
- **Kerbrute enum**: When an **invalid username is requested** the server will respond using the **Kerberos error** code _KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN_, allowing us to determine that the username was invalid. **Valid usernames** will illicit either the **TGT in a AS-REP** response or the error _KRB5KDC_ERR_PREAUTH_REQUIRED_, indicating that the user is required to perform pre-authentication.
- **No Authentication against MS-NRPC**: Using auth-level = 1 (No authentication) against the MS-NRPC (Netlogon) interface on domain controllers. The method calls the `DsrGetDcNameEx2` function after binding MS-NRPC interface to check if the user or computer exists without any credentials. The [NauthNRPC](https://github.com/sud0Ru/NauthNRPC) tool implements this type of enumeration. The research can be found [here](https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2024/05/22190247/A-journey-into-forgotten-Null-Session-and-MS-RPC-interfaces.pdf)
```bash
./kerbrute_linux_amd64 userenum -d lab.ropnop.com --dc 10.10.10.10 usernames.txt #From https://github.com/ropnop/kerbrute/releases
@ -88,6 +89,7 @@ Nmap -p 88 --script=krb5-enum-users --script-args krb5-enum-users.realm='<domain
msf> use auxiliary/gather/kerberos_enumusers
crackmapexec smb dominio.es -u '' -p '' --users | awk '{print $4}' | uniq
python3 nauth.py -t target -u users_file.txt #From https://github.com/sud0Ru/NauthNRPC
```
- **OWA (Outlook Web Access) Server**