Added Sigma Rules

rules/Sigma/win_powershell_audio_capture.yml

@@ -0,0 +1,28 @@
+title: Audio Capture via PowerShell
+author: E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
+date: 2019/10/24
+description: Detects audio capture via PowerShell Cmdlet.
+detection:
+    SELECTION_1:
+        EventID: 1
+    SELECTION_2:
+        CommandLine: '*WindowsAudioDevice-Powershell-Cmdlet*'
+    condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Legitimate audio capture by legitimate user.
+id: 932fb0d8-692b-4b0f-a26e-5643a50fe7d6
+level: medium
+logsource:
+    category: process_creation
+    product: windows
+modified: 2019/11/11
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1123/T1123.md
+- https://eqllib.readthedocs.io/en/latest/analytics/ab7a6ef4-0983-4275-a4f1-5c6bd3c31c23.html
+status: experimental
+tags:
+- attack.collection
+- attack.t1123
+yml_filename: win_powershell_audio_capture.yml
+yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
+