Detectionmediumtest
CurrentVersion NT Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
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Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, François HubautCreated Fri Oct 25Updated Wed Oct 22cbf93e5d-ca6c-4722-8bea-e9119007c248windows
Log Source
WindowsRegistry Set
ProductWindows← raw: windows
CategoryRegistry Set← raw: registry_set
Detection Logic
Detection Logic14 selectors
detection:
selection_nt_current_version_base:
TargetObject|contains: '\SOFTWARE\Microsoft\Windows NT\CurrentVersion'
selection_nt_current_version:
TargetObject|contains:
- '\Winlogon\VmApplet'
- '\Winlogon\Userinit'
- '\Winlogon\Taskman'
- '\Winlogon\Shell'
- '\Winlogon\GpExtensions'
- '\Winlogon\AppSetup'
- '\Winlogon\AlternateShells\AvailableShells'
- '\Windows\IconServiceLib'
- '\Windows\Appinit_Dlls'
- '\Image File Execution Options' # Covered in better details in 36803969-5421-41ec-b92f-8500f79c23b0
- '\Font Drivers'
- '\Drivers32'
- '\Windows\Run'
- '\Windows\Load'
filter_main_empty:
Details: '(Empty)'
filter_main_null:
Details: null
filter_main_poqexec:
Image: 'C:\Windows\System32\poqexec.exe'
filter_main_legitimate_subkey: # Legitimately used subkeys of \Image File Execution Options, which are not used for persistence (see https://pentestlab.blog/2020/01/13/persistence-image-file-execution-options-injection/)
TargetObject|contains: '\Image File Execution Options\'
TargetObject|endswith:
- '\DisableExceptionChainValidation'
- '\MitigationOptions'
filter_main_security_extension_dc:
Image: 'C:\Windows\system32\svchost.exe'
TargetObject|contains:
- '\Winlogon\GPExtensions\{827D319E-6EAC-11D2-A4EA-00C04F79F83A}\PreviousPolicyAreas'
- '\Winlogon\GPExtensions\{827D319E-6EAC-11D2-A4EA-00C04F79F83A}\MaxNoGPOListChangesInterval'
Details:
- 'DWORD (0x00000001)'
- 'DWORD (0x00000009)'
- 'DWORD (0x000003c0)'
filter_main_runtimebroker:
Image: 'C:\Windows\System32\RuntimeBroker.exe'
TargetObject|contains: '\runtimebroker.exe\Microsoft.Windows.ShellExperienceHost'
filter_optional_edge:
Image|startswith: 'C:\Program Files (x86)\Microsoft\Temp\'
Image|endswith: '\MicrosoftEdgeUpdate.exe'
filter_optional_avguard:
Image|startswith:
- 'C:\Program Files (x86)\Avira\Antivirus\avguard.exe'
- 'C:\Program Files\Avira\Antivirus\avguard.exe'
TargetObject|contains: 'SOFTWARE\WOW6432Node\Avira\Antivirus\Overwrite_Keys\HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\'
TargetObject|endswith:
- '\userinit\UseAsDefault'
- '\shell\UseAsDefault'
Details:
- 'explorer.exe'
- 'C:\Windows\system32\userinit.exe,'
filter_optional_msoffice:
- TargetObject|contains:
- '\ClickToRunStore\HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\'
- '\ClickToRun\REGISTRY\MACHINE\Software\Microsoft\Windows NT\CurrentVersion\'
- Image:
- 'C:\Program Files\Microsoft Office\root\integration\integrator.exe'
- 'C:\Program Files (x86)\Microsoft Office\root\integration\integrator.exe'
filter_optional_officeclicktorun:
Image|startswith:
- 'C:\Program Files\Common Files\Microsoft Shared\ClickToRun\'
- 'C:\Program Files\Common Files\Microsoft Shared\ClickToRun\Updates\'
Image|endswith: '\OfficeClickToRun.exe'
filter_optional_ngen:
Image|startswith: 'C:\Windows\Microsoft.NET\Framework'
Image|endswith: '\ngen.exe'
filter_optional_onedrive:
Image|endswith: '\AppData\Local\Microsoft\OneDrive\StandaloneUpdater\OneDriveSetup.exe'
TargetObject|endswith: '\Microsoft\Windows\CurrentVersion\RunOnce\Delete Cached Update Binary'
Details|startswith: 'C:\Windows\system32\cmd.exe /q /c del /q "C:\Users\'
Details|endswith: '\AppData\Local\Microsoft\OneDrive\Update\OneDriveSetup.exe"'
condition: all of selection_* and not 1 of filter_main_* and not 1 of filter_optional_*False Positives
Legitimate software automatically (mostly, during installation) sets up autorun keys for legitimate reason
Legitimate administrator sets up autorun keys for legitimate reason
MITRE ATT&CK
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Rule not found17f878b8-9968-4578-b814-c4217fc5768c
Rule Metadata
Rule ID
cbf93e5d-ca6c-4722-8bea-e9119007c248
Status
test
Level
medium
Type
Detection
Created
Fri Oct 25
Modified
Wed Oct 22
Author
Path
rules/windows/registry/registry_set/registry_set_asep_reg_keys_modification_currentversion_nt.yml
Raw Tags
attack.privilege-escalationattack.persistenceattack.t1547.001