Potential Defense Evasion Via Raw Disk Access By Uncommon Tools

Title: Potential Defense Evasion Via Raw Disk Access By Uncommon Tools
Status: test
Description:Detects raw disk access using uncommon tools or tools that are located in suspicious locations (heavy filtering is required), which could indicate possible defense evasion attempts
References:
  -https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
Author: Teymur Kheirkhabarov, oscd.community
Date: 2019-10-22
modified:2025-12-03
Tags:

• -'attack.stealth'
• -'attack.t1006'

Logsource:

• product: windows
• category: raw_access_thread

Detection:
  filter_main_floppy:
    Device|contains: 'floppy'
  filter_main_generic:
    Image|startswith:
      -'C:\$WINDOWS.~BT\'
      -'C:\Program Files (x86)\'
      -'C:\Program Files\'
      -'C:\Windows\CCM\'
      -'C:\Windows\explorer.exe'
      -'C:\Windows\servicing\'
      -'C:\Windows\SoftwareDistribution\'
      -'C:\Windows\System32\'
      -'C:\Windows\SystemApps\'
      -'C:\Windows\SysWOW64\'
      -'C:\Windows\uus\'
      -'C:\Windows\WinSxS\'

  filter_main_system_images:
    Image:
      -'Registry'
      -'System'

  filter_main_windefender:
    Image|startswith: 'C:\ProgramData\Microsoft\Windows Defender\Platform\'
    Image|endswith:
      -'\MsMpEng.exe'
      -'\MpDefenderCoreService.exe'

  filter_main_microsoft_appdata:
    Image|startswith: 'C:\Users\'
    Image|contains|all:
      -'\AppData\'
      -'\Microsoft\'

  filter_main_ssd_nvme:
    Image|startswith: 'C:\Windows\Temp\'
    Image|endswith:
      -'\Executables\SSDUpdate.exe'
      -'\HostMetadata\NVMEHostmetadata.exe'

  filter_main_null:
    Image: 'None'
  filter_main_systemsettings:
    Image: 'C:\Windows\ImmersiveControlPanel\SystemSettings.exe'
  filter_main_update:
    Image|startswith: 'C:\$WinREAgent\Scratch\'
  filter_optional_github_desktop:
    Image|startswith: 'C:\Users\'
    Image|contains: '\AppData\Local\GitHubDesktop\app-'
    Image|endswith: '\resources\app\git\mingw64\bin\git.exe'
  filter_optional_nextron:
    Image|startswith: 'C:\Windows\Temp\asgard2-agent\'
    Image|endswith: '\thor.exe'
  filter_optional_Keybase:
    Image|startswith: 'C:\Users\'
    Image|contains: '\AppData\Local\Keybase\upd.exe'
  condition:not 1 of filter_main_* and not 1 of filter_optional_*
Falsepositives:
  -Likely
Level: low