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Free Trial No signup needed No obligation trial. No credit card needed. Learn more When running multiple queries to the same computer, using a CIM session is more efficient than using the computer name for each query. Creating a CIM session only sets up the connection once.
Then, multiple queries use that same session to retrieve information. Using the computer name requires the cmdlets to set up and tear down the connection with each individual query. It's actually not the PowerShell version that matters, it's the stack version. The stack version can be determined using the Test-WSMan cmdlet.
It needs to be version 3. That's the version you'll find with PowerShell version 3. This allows the Get-CimInstance cmdlet to be used to communicate with versions of Windows as old as Windows Server For efficiency, you can store your domain administrator or elevated credentials in a variable so you don't have to constantly enter them for each command.
It's the newest Windows Server operating system that doesn't have PowerShell installed by default. The Get-CimSession cmdlet is used to see what CimSessions are currently connected and what protocols they're using. One of the most useful ones is about a function that I created to automatically determine if WSMan or DCOM should be used and set up the CIM session automatically without having to figure out which one manually.
In this chapter, you've learned about using PowerShell to work with WMI on both local and remote computers. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services.
Privacy policy. Neat, right? Obviously, at a practical level, wmic is an incredible aide for sysadmins. And before you start shouting into the browser, I know there are also equivalent PowerShell cmdlets , but I find the wmic syntax easier to remember. Thankfully, Impacket does just that.
Wmiexec offers a workable pseudo-shell experience, where for each command entered on the client-side, it directly launches a separate shell on the target machine to run the command.
Both psexec and smbexec use — see my previous post — Windows Services to launch commands on the remote system. Smbexec is a little stealthier since it quickly creates and then deletes a service, whereas psexec leaves the telltale service around. Keep in mind that WMI is generally not the first place defenders investigate as a possible source for threats, whereas Services is usually a good starting point for looking for evidence of an attack.
Well played, wmiexec! While I thought I was being clever in my own WMI experiments, it turns out the pen tester community has been there and done that! You query this underlying Windows object to find users who are currently logged on.
Got that? The next question is how to code the script block. The mythical insider in my scenario is interested in a specific user, Cruella. You can gaze upon the complete solution below:. Keep in mind that our insider is laying low. You can make your lateral move when you get the notification from Register-WmiEvent. How does the script then return this interesting news that Cruella has logged on to the targeted machine?
Those of you who spotted the use of Netcat commands above get extra credit. Netcat is a well-known and versatile communications tool — not necessarily considered malware — that pops reverse shells , or can simply send a message across the network. I went with the latter option. Mission accomplished. WMI is a management framework built into the Windows Server installation, so you should always have the latest version installed.
All new releases of the framework are backwards compatible with previous versions so they should work out of the box without any major configuration changes. So which monitoring solution is right for you?
The answer will depend on the size and complexity of your network, the skills of your network administrators and your available budget. One of the major advantages of SNMP is that it is easy to deploy and configure even on larger networks. It can also be used to manage all devices on the network regardless of the manufacturer. Many SNMP tools are also free which helps keep costs down.
The downside is that standard SNMP features are very basic. If you require more sophisticated data and configuration options and you operate a large Windows OS environment, then WMI is the way to go. This will provide you with a powerful framework to streamline the monitoring and management of your Windows OS environment. The downside is more complexity and increased operational overhead.
Fault management is the process of detecting, analysing and responding to faults in a system. It is an essential part of any IT infrastructure because it helps maintain availability and quality of service for applications. Event actions, inside opEvents,
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