Overview

overview

10

Static

static

5

AccessibleMarshal.dll

windows10-2004-x64

1

AccessibleMarshal.dll

windows11-ltsc_2024-x64

8

firefoxupdate.dll

windows10-2004-x64

1

firefoxupdate.dll

windows11-ltsc_2024-x64

1

freebl3.dll

windows10-2004-x64

1

freebl3.dll

windows11-ltsc_2024-x64

1

gkcodecs.dll

windows10-2004-x64

1

gkcodecs.dll

windows11-ltsc_2024-x64

1

lgpllibs.dll

windows10-2004-x64

1

lgpllibs.dll

windows11-ltsc_2024-x64

1

libEGL.dll

windows10-2004-x64

1

libEGL.dll

windows11-ltsc_2024-x64

1

libGLESv2.dll

windows10-2004-x64

1

libGLESv2.dll

windows11-ltsc_2024-x64

1

mozavcodec.dll

windows10-2004-x64

1

mozavcodec.dll

windows11-ltsc_2024-x64

1

mozavutil.dll

windows10-2004-x64

1

mozavutil.dll

windows11-ltsc_2024-x64

1

mozglue.dll

windows10-2004-x64

1

mozglue.dll

windows11-ltsc_2024-x64

1

mozinference.dll

windows10-2004-x64

1

mozinference.dll

windows11-ltsc_2024-x64

8

mozwer.dll

windows10-2004-x64

1

mozwer.dll

windows11-ltsc_2024-x64

1

msvcp140.dll

windows10-2004-x64

1

msvcp140.dll

windows11-ltsc_2024-x64

1

notificati...er.dll

windows10-2004-x64

1

notificati...er.dll

windows11-ltsc_2024-x64

1

nss3.dll

windows10-2004-x64

1

nss3.dll

windows11-ltsc_2024-x64

1

plugin-container.exe

windows10-2004-x64

10

softokn3.dll

windows10-2004-x64

1

Analysis

  • max time kernel
    117s
  • max time network
    127s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/07/2026, 00:15

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General

  • Target
    AccessibleMarshal.dll
  • Size 228KB
  • Sample260701-aj461scv4y
  • SHA256 a064daea6363821e9e6f7f8352d69bce3a9273466cdb905187e4c3b0fd31256d
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarepersistenceransomwarespyware

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\AccessibleMarshal.dll,#1
    1⤵
      PID:688
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3844
      • C:\Windows\explorer.exe
        explorer.exe /LOADSAVEDWINDOWS
        2⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Enumerates connected drives
        • Checks SCSI registry key(s)
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        PID:1636
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:4504
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:3352

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          prep_Activatable Class_Hermes_perf.cache
          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
          • Size 599B
          • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          prep_Activatable Class_Hermes_perf.cache
          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
          • Size 595B
          • SHA256 d4e60617c2afab8263febabe7f14f18595715078d71307a8cefe0707dae76dee
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          memory/4504-2-0x000001FF001E0000-0x000001FF002E0000-memory.dmp
          Download

          memory/4504-47-0x000001FF146B0000-0x000001FF146D0000-memory.dmp
          Download

          memory/4504-24-0x000001FF03A10000-0x000001FF03A30000-memory.dmp
          Download

          memory/4504-25-0x000001FF13EC0000-0x000001FF13FC0000-memory.dmp
          Download

          memory/4504-33-0x000001FF03DB0000-0x000001FF03DD0000-memory.dmp
          Download