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[**SharpSystemTriggers**](https://github.com/cube0x0/SharpSystemTriggers) is a **collection** of **remote authentication triggers** coded in C# using MIDL compiler for avoiding 3rd party dependencies.
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:
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)).
The `PrivExchange` attack results from a flaw in the Exchange Server `PushSubscription` feature, which allows **any domain user with a mailbox to force the Exchange server to authenticate** to any host provided by the client over HTTP.
The Exchange service runs as **SYSTEM** and is **over-privileged** by default (i.e., has WriteDacl privileges on the domain pre-2019 Cumulative Update). This flaw can be leveraged to r**elay to LDAP and dump the domain NTDS database**. If we cannot relay to LDAP, this can be leveraged to relay and authenticate to **other hosts** within the domain. This attack will take you directly to Domain Admin with any authenticated domain user account.
****[**This technique was copied from here.**](https://academy.hackthebox.com/module/143/section/1276)****
If you know the **email address** of the user that logs inside a machine you want to compromise, you could just send him an **email with a 1x1 image** such as
and when he opens it, he will try to authenticate.
### MitM
If you can perform a MitM attack to a computer and inject HTML in a page he will visualize you could try injecting an image like the following in the page:
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