Added Sigma Rules

rules/Sigma/powershell_cl_invocation_lolscript_count.yml

@@ -0,0 +1,30 @@
+title: Execution via CL_Invocation.ps1 (2 Lines)
+author: oscd.community, Natalia Shornikova
+date: 2020/10/14
+description: Detects Execution via SyncInvoke in CL_Invocation.ps1 module
+detection:
+    SELECTION_1:
+        ScriptBlockText: '*CL_Invocation.ps1*'
+    SELECTION_2:
+        ScriptBlockText: '*SyncInvoke*'
+    condition: (SELECTION_1 or SELECTION_2)| count(ScriptBlockText) by Computer >
+        2
+falsepositives:
+- Unknown
+id: f588e69b-0750-46bb-8f87-0e9320d57536
+level: high
+logsource:
+    category: ps_script
+    definition: Script block logging must be enabled
+    product: windows
+modified: 2021/10/16
+references:
+- https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSScripts/Cl_invocation.yml
+- https://twitter.com/bohops/status/948061991012327424
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1216
+yml_filename: powershell_cl_invocation_lolscript_count.yml
+yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/powershell/powershell_script
+