ルール更新 (#224)

rules/sigma/process_creation/sysmon_long_powershell_commandline.yml

@@ -0,0 +1,33 @@
+
+title: Too Long PowerShell Commandlines
+author: oscd.community, Natalia Shornikova
+date: 2020/10/06
+description: Detects Too long PowerShell command lines
+detection:
+  SELECTION_1:
+    EventID: 1
+  SELECTION_2:
+    CommandLine:
+    - '*powershell*'
+    - '*pwsh*'
+  SELECTION_3:
+    Description: Windows Powershell
+  SELECTION_4:
+    Product: PowerShell Core 6
+  SELECTION_5:
+    CommandLine|re: .{1000,}
+  condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3 or SELECTION_4) and SELECTION_5)
+falsepositives:
+- Unknown
+id: d0d28567-4b9a-45e2-8bbc-fb1b66a1f7f6
+level: medium
+logsource:
+  category: process_creation
+  product: windows
+modified: 2021/05/21
+references:
+- https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001