alexverboon

Config Refresh - PowerShell stuff

Get Config Refresh Events from the Event Log

# Define the event log name
$logName = "Microsoft-Windows-DeviceManagement-Enterprise-Diagnostics-Provider/Operational"

# Define the event IDs you want to retrieve
$eventIDs = @(4200, 4201, 4202) + (4203..4214)

alexverboon

# Get Entra ID Device Info around registration and Management
# Devices with ManagementType 'MicrosoftSense' are managed with MDE Settings Management.
# Devices with OperatingSystem 'Windows Server' are also managed by MDE settings management

$Result = [System.Collections.ArrayList]::new()
$AllDevices = Get-MgDevice -All
foreach ($Device in $AllDevices) {
    $DeviceDetail = $Device.AdditionalProperties
    $object = [PSCustomObject]@{
        DeviceName = $Device.DisplayName

alexverboon

#!/bin/bash

#============================================================================
#
#  Copyright (c) 2021 Microsoft Corporation.  All rights reserved.
#
#  Abstract:
#    MDE installation script 
#    - Fingerprinting OS and manually installs MDE as described in the online documentation
#      https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/linux-install-manually?view=o365-worldwide

alexverboon

You can check the update channel using the following command: mdatp --health releaseRing

If your device is not already in the InsiderSlow update channel, execute the following command from the Terminal. The channel update takes effect next time the product starts (when the next product update is installed or when the device is rebooted).

defaults write com.microsoft.autoupdate2 ChannelName InsiderSlow

alexverboon

[Environment]::SetEnvironmentVariable("LOG4J_FORMAT_MSG_NO_LOOKUPS", $null, [EnvironmentVariableTarget]::Machine)

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// CM Pivot for Defender Troubleshooting

// Defender Event logs
WinEvent('Microsoft-Windows-Windows Defender/Operational', 1d)
// MDE Eent logs
WinEvent('Microsoft-Windows-SENSE/Operational', 1d)

// MDE Service Status
Service
| where Name == 'Sense'  

alexverboon

$log4 = Get-log4files

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$vulnerablesums = -split $(Invoke-WebRequest https://github.com/mubix/CVE-2021-44228-Log4Shell-Hashes/raw/main/sha256sums.txt -UseBasicParsing).content | ? {$_.length -eq 64}
($log4 | Select-Object).FH | Compare-Object -ReferenceObject $vulnerablesums -IncludeEqual 

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$chck = ((invoke-webrequest https://gist.githubusercontent.com/spasam/7b2b2e03c6dd7bd6f1029e88c7cc82ad/raw/ed104b9bed088c04069b3139ae9adbdc9b99b2ac/log4j-core.csv -UseBasicParsing).content | ConvertFrom-Csv -Delimiter "," | Select-Object).sha256
($log4 | Select-Object).FH | Compare-Object -ReferenceObject $chck -IncludeEqual 

alexverboon

Function Get-log4files(){
$Drives = Get-PSDrive | Select-Object -ExpandProperty 'Name' | Select-String -Pattern '^[a-e]$'
$FileInfo = [System.Collections.ArrayList]::new()
$Filetypes =  @("*.jar")
    ForEach($DriveLetter in $Drives)
    {
        $Drive = "$DriveLetter" + ":\"
        $Log4Files = Get-ChildItem -Path $Drive -Filter "*log4j-core*" -Include $Filetypes -Recurse -File -ErrorAction SilentlyContinue | Select-Object FullName 
        Foreach($file in $Log4Files)
        {

alexverboon

C2 Hunt Feed - Infrastructure hosting Command & Control Servers found during Proactive Hunt by Threatview.io

https://threatview.io/Downloads/High-Confidence-CobaltStrike-C2%20-Feeds.txt IP,Date of Detection,Host,Protocol,Beacon Config,Comment

Inspiration: https://azurecloudai.blog/2021/08/12/how-to-use-threatview-io-threat-intelligence-feeds-with-azure-sentinel/

// C2 Hunt Feed - Infrastructure hosting Command & Control Servers found during Proactive Hunt by Threatview.io
// #IP,Date of Detection,Host,Protocol,Beacon Config,Comment

alexverboon

T1562.001 - Defender Exclusions modification

Use the below query to detect Windows Defender exclusion changes.

---

Query

// T1562.001 - Impair Defenses: Disable or Modify Tools