Added Sigma Rules

2021-11-14 11:00:56 +09:00
parent ac3ea7b20b
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+title: Suspicious MSHTA Process Patterns
+author: Florian Roth
+date: 2021/07/17
+description: Detects suspicious mshta process patterns
+detection:
+    SELECTION_1:
+        EventID: 1
+    SELECTION_10:
+        CommandLine: '*.htm*'
+    SELECTION_11:
+        CommandLine: '*.hta*'
+    SELECTION_12:
+        CommandLine: '*mshta.exe'
+    SELECTION_13:
+        CommandLine: '*mshta'
+    SELECTION_2:
+        Image: '*\mshta.exe'
+    SELECTION_3:
+        ParentImage: '*\cmd.exe'
+    SELECTION_4:
+        ParentImage: '*\powershell.exe'
+    SELECTION_5:
+        CommandLine: '*\AppData\Local*'
+    SELECTION_6:
+        CommandLine: '*C:\Windows\Temp*'
+    SELECTION_7:
+        CommandLine: '*C:\Users\Public*'
+    SELECTION_8:
+        Image: '*C:\Windows\System32*'
+    SELECTION_9:
+        Image: '*C:\Windows\SysWOW64*'
+    condition: (SELECTION_1 and SELECTION_2 and ((((SELECTION_3 or SELECTION_4) or
+        (SELECTION_5 or SELECTION_6 or SELECTION_7)) or  not ((SELECTION_8 or SELECTION_9)))
+        or  not ((SELECTION_10 or SELECTION_11) and (SELECTION_12 or SELECTION_13))))
+falsepositives:
+- Unknown
+id: e32f92d1-523e-49c3-9374-bdb13b46a3ba
+level: high
+logsource:
+    category: process_creation
+    product: windows
+references:
+- https://en.wikipedia.org/wiki/HTML_Application
+- https://www.echotrail.io/insights/search/mshta.exe
+- https://app.any.run/tasks/34221348-072d-4b70-93f3-aa71f6ebecad/
+status: experimental
+tags:
+- attack.execution
+yml_filename: win_susp_mshta_pattern.yml
+yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
+