Add: sigma rules (#175)

rules/sigma/windows/file_delete/sysmon_delete_prefetch.yml

@@ -0,0 +1,31 @@
+
+title: Prefetch File Deletion
+author: Cedric MAURUGEON
+date: 2021/09/29
+description: Detects the deletion of a prefetch file (AntiForensic)
+detection:
+  SELECTION_1:
+    EventID: 23
+  SELECTION_2:
+    EventID: 26
+  SELECTION_3:
+    TargetFilename: C:\Windows\Prefetch\\*
+  SELECTION_4:
+    TargetFilename: '*.pf'
+  SELECTION_5:
+    Image: C:\windows\system32\svchost.exe
+  SELECTION_6:
+    User: NT AUTHORITY\SYSTEM
+  condition: ((SELECTION_1 or SELECTION_2) and (SELECTION_3 and SELECTION_4) and  not
+    (SELECTION_5 and SELECTION_6))
+falsepositives:
+- Unknown
+id: 0a1f9d29-6465-4776-b091-7f43b26e4c89
+level: high
+logsource:
+  category: file_delete
+  product: windows
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1070.004