![]() ![]() We must have the ability to restart the service otherwise the changes can’t take place to escalate our privileges. CanRestart: It is important this is True.Generally, we would like it if it is running with LocalSystem or Administrator privileges. It is important that this user has higher privileges than our current privileges, otherwise, it will be pointless in exploiting it. StartName: This is who the service runs as.ModifiableFile: If we can abuse this service, this is the file that will be modified.Path: This is where the program is located or run from.ServiceName: This is the name of the service.Here’s a breakdown of some of the output. If you notice the section that reads Checking service permissions… We see a service that comes back as potentially vulnerable. PowerUp.ps1 will run all the required checks and spit out a lot of stuff. Metasploit will upload the script, run it on the target, retrieve the results and save them back to your local machine Before you use this module, first append “Invoke-AllChecks” to the end of PowerUp.ps1 on your attacker machine, and then specify the local path to the script in the module options. There’s also a Metasploit module for running powershell commands through a session, post/windows/manage/powershell/exec_powershell. There are several others out there, but this is my go-to:PowerShell Type this into the PowerShell console to bypass AMSI. Below is a good bypass for AMSI that hasn’t been patched by Microsoft yet. So now that we have bypassed PowerShell’s execution policy, we need to disable AMSI. So you can simply disable this by typing in the following into a PowerShell console:HTML1 PS C:\> powershell -ep bypass It’s not a security feature, it’s a safety feature. Keep in mind though, that is to prevent “average users” from executing malicious scripts. This feature helps prevent the execution of malicious scripts. PowerShell’s execution policy is a safety feature that controls the conditions under which PowerShell loads configuration files and runs scripts. If you want to read more about AMSI, click here. It uses a string based detection mechanism to detect “dangerous” commands and potentially malicious scripts. I won’t go into too much detail about what AMSI is, but in short it is a new security feature that Microsoft has baked into PowerShell and Windows 10. Bypassing AMSI and Disable Execution Policy So let’s remove lines 1-9 from the file and save it. ![]() I tested this with McAfee, and apparently the signature McAfee uses to flag this file as “malware” is the comment right at the top of the script. To do this, open up a text editor and load the PowerUp.ps1 file. A lot of the time, the anti-virus signatures rely on comments in the program to determine if the program is a “known threat”. The reason we want to modify the script is because anti-virus will read the script and flag it as malware. Modifying the ScriptĪfter you have downloaded the script, the first thing to do is modify the script. If you don’t want to touch disk, I will provide those methods at the end. The first method I go over will touch disk which means we will need to disable certain protections. You don’t have to do all these steps depending on what protections are in place on the machine so feel free to skip steps that aren’t relevant for your situation. Select the misconfiguration you want to exploit and run the provided command.Disable AMSI and bypass PowerShell Execution Policy.Upload the file to the target Windows machine.Here is a brief overview of how to use PowerUp.ps1 It is not a comprehensive check against all known privilege escalation techniques, but it is often a good place to start when you are attempting to escalate local privileges.Īn Extensive Usage Guide can be found here: PowerUp.ps1 is a program that enables a user to perform quick checks against a Windows machine for any privilege escalation opportunities.
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