From 486fdabe340bd344900de3a36d1e9cd102f5a777 Mon Sep 17 00:00:00 2001
From: frack113 <62423083+frack113@users.noreply.github.com>
Date: Sat, 10 Sep 2022 19:15:36 +0200
Subject: [PATCH] Add posh_ps_disable_windowsoptionalfeature

---
 ...posh_ps_disable_windowsoptionalfeature.yml | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 rules/windows/powershell/powershell_script/posh_ps_disable_windowsoptionalfeature.yml

diff --git a/rules/windows/powershell/powershell_script/posh_ps_disable_windowsoptionalfeature.yml b/rules/windows/powershell/powershell_script/posh_ps_disable_windowsoptionalfeature.yml
new file mode 100644
index 000000000..601f6b71f
--- /dev/null
+++ b/rules/windows/powershell/powershell_script/posh_ps_disable_windowsoptionalfeature.yml
@@ -0,0 +1,35 @@
+title: Disable-WindowsOptionalFeature Command PowerShell
+id: 99c4658d-2c5e-4d87-828d-7c066ca537c3
+status: experimental
+author: frack113
+date: 2021/09/10
+description: |
+  Detect built in PowerShell cmdlet Disable-WindowsOptionalFeature, Deployment Image Servicing and Management tool.
+  Similar to DISM.exe, this cmdlet is used to enumerate, install, uninstall, configure, and update features and packages in Windows images
+references:
+    - https://github.com/redcanaryco/atomic-red-team/blob/5b67c9b141fa3918017f8fa44f2f88f0b1ecb9e1/atomics/T1562.001/T1562.001.md
+    - https://docs.microsoft.com/en-us/powershell/module/dism/disable-windowsoptionalfeature?view=windowsserver2022-ps
+tags:
+    - attack.collection
+    - attack.t1119
+logsource:
+    product: windows
+    category: ps_script
+    definition: Script block logging must be enabled
+detection:
+    selection_cmd:
+        ScriptBlockText|contains|all:
+            - 'Disable-WindowsOptionalFeature'
+            - '-Online'
+            - '-FeatureName'
+    selection_feature:
+        # Add any important windows features
+        ScriptBlockText|contains:
+            - 'Windows-Defender-Gui'
+            - 'Windows-Defender-Features'
+            - 'Windows-Defender'
+            - 'Windows-Defender-ApplicationGuard'
+    condition: all of selection*
+falsepositives:
+    - Unknown
+level: high