Added Sigma Rules

rules/Sigma/win_susp_script_exec_from_temp.yml

@@ -0,0 +1,57 @@
+title: Suspicious Script Execution From Temp Folder
+author: Florian Roth, Max Altgelt
+date: 2021/07/14
+description: Detects a suspicious script executions from temporary folder
+detection:
+    SELECTION_1:
+        EventID: 1
+    SELECTION_10:
+        CommandLine: '*%TEMP%*'
+    SELECTION_11:
+        CommandLine: '*%TMP%*'
+    SELECTION_12:
+        CommandLine: '*%LocalAppData%\Temp*'
+    SELECTION_13:
+        CommandLine: '* >*'
+    SELECTION_14:
+        CommandLine: '*Out-File*'
+    SELECTION_15:
+        CommandLine: '*ConvertTo-Json*'
+    SELECTION_16:
+        CommandLine: '*-WindowStyle hidden -Verb runAs*'
+    SELECTION_2:
+        Image: '*\powershell.exe'
+    SELECTION_3:
+        Image: '*\mshta.exe'
+    SELECTION_4:
+        Image: '*\wscript.exe'
+    SELECTION_5:
+        Image: '*\cscript.exe'
+    SELECTION_6:
+        CommandLine: '*\Windows\Temp*'
+    SELECTION_7:
+        CommandLine: '*\Temporary Internet*'
+    SELECTION_8:
+        CommandLine: '*\AppData\Local\Temp*'
+    SELECTION_9:
+        CommandLine: '*\AppData\Roaming\Temp*'
+    condition: (SELECTION_1 and ((SELECTION_2 or SELECTION_3 or SELECTION_4 or SELECTION_5)
+        and (SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9 or SELECTION_10
+        or SELECTION_11 or SELECTION_12)) and  not ((SELECTION_13 or SELECTION_14
+        or SELECTION_15 or SELECTION_16)))
+falsepositives:
+- Administrative scripts
+id: a6a39bdb-935c-4f0a-ab77-35f4bbf44d33
+level: high
+logsource:
+    category: process_creation
+    product: windows
+modified: 2021/11/11
+references:
+- https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit/
+status: experimental
+tags:
+- attack.execution
+yml_filename: win_susp_script_exec_from_temp.yml
+yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
+