Merge pull request #1264 from omkar72/sdev-1

Adding 2 rules - Conhost & office test registry persistence

rules/windows/process_creation/win_susp_conhost.yml

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+title: Conhost Parent Proces Executions
+id: 7dc2dedd-7603-461a-bc13-15803d132355
+status: experimental
+description: Detects the conhost execution as parent process. Can be used to evaded defense mechanism.
+references:
+    - http://www.hexacorn.com/blog/2020/05/25/how-to-con-your-host/
+author: omkar72
+date: 2020/10/25
+tags:
+    - attack.defense_evasion
+    - attack.t1202
+logsource:
+    category: process_creation
+    product: windows
+detection:
+    selection:
+        ParentImage: '*\conhost.exe'
+    condition: selection
+fields:
+    - Image
+    - CommandLine
+    - ParentCommandLine
+falsepositives:
+    - Unlikely, conhost is a child less process
+level: medium

rules/windows/registry_event/sysmon_office_test_regadd.yml

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+title: Office Application Startup - Office Test
+id: 3d27f6dd-1c74-4687-b4fa-ca849d128d1c
+status: experimental
+description: Detects the addition of office test registry that allows a user to specify an arbitrary DLL that will be executed everytime an Office application is started
+references:
+    - https://attack.mitre.org/techniques/T1137/002/
+author: omkar72
+tags:
+    - attack.persistence
+    - attack.t1137.002
+date: 2020/10/25
+logsource:
+    category: registry_event
+    product: windows
+detection:
+    selection_registry:
+        TargetObject:
+            - 'HKEY_CURRENT_USER\Software\Microsoft\Office test\Special\Perf'
+            - 'HKEY_LOCAL_MACHINE\Software\Microsoft\Office test\Special\Perf'
+    condition: selection_registry
+falsepositives:
+    - Unlikely
+level: medium