Windows PowerShell is a cross-platform task automation and configuration management framework, consisting of a command-line shell and scripting language. It is built on top of the .NET Common Language Runtime (CLR). It helps IT professionals automate system administration of Windows operating system and applications that run on Windows.
Blumira integrates with Microsoft Windows operating systems to provide automated threat detection and actionable response for PowerShell. Blumira supports the following Microsoft Windows server operating systems:
Blumira provides broad coverage for windows server including collecting logs using NXLog, Command Line Logging, DNS Debugging and Winlogbeat.
Recommended: Use Blumira’s automated Windows log setup agent, Poshim (PowerShell Shim), designed to help ensure you’re collecting the right data from hosts across your entire environment. Poshim handles the installation and configuration for NXLog and Sysmon to ship logs over Sysmon to a targeted IP.
If using Poshim, nothing further is needed on this page. For manual config, continue reading below.
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You will need to first install and configure NXLog on the windows host using these instructions: https://www.blumira.com/integration/windows-server/
To reduce noise, Blumira recommends setting this up to only log out Dropped traffic by the Firewall. While Allowed traffic can be sent, it will drastically increase noise within your logging infrastructure and will essentially log all traffic from that host. Blumira recommends only doing this in situations where you have a highly sensitive host that does not traverse any other logging that Blumira captures.
Recommended PowerShell Command
Set-NetFirewallProfile –LogFileName %SystemRoot%\System32\LogFiles\Firewall\pfirewall.log -LogBlocked True -LogAllowed False -LogIgnored True
If significant verbosity is required, use this command which will log Allowed connections as well
Set-NetFirewallProfile –LogFileName %SystemRoot%\System32\LogFiles\Firewall\pfirewall.log -LogBlocked True -LogAllowed True -LogIgnored True