Overview

overview

8

Static

static

3

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

8

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/...40.dll

windows10-2004-x64

1

_internal/...40.dll

windows11-ltsc_2024-x64

6

_internal/...io.dll

windows10-2004-x64

1

_internal/...io.dll

windows11-ltsc_2024-x64

1

_internal/_bz2.dll

windows10-2004-x64

1

_internal/_bz2.dll

windows11-ltsc_2024-x64

1

_internal/...64.dll

windows10-2004-x64

1

_internal/...64.dll

windows11-ltsc_2024-x64

1

_internal/_ctypes.dll

windows10-2004-x64

1

_internal/_ctypes.dll

windows11-ltsc_2024-x64

1

_internal/...al.dll

windows10-2004-x64

1

_internal/...al.dll

windows11-ltsc_2024-x64

6

_internal/...ee.dll

windows10-2004-x64

1

_internal/...ee.dll

windows11-ltsc_2024-x64

1

_internal/...ib.dll

windows10-2004-x64

1

_internal/...ib.dll

windows11-ltsc_2024-x64

1

Analysis

  • max time kernel
    148s
  • max time network
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    20/06/2026, 04:35

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General

  • Target
    _internal/_decimal.dll
  • Size 242KB
  • Sample260620-e7ptfset8y
  • SHA256 4f1ecc777c30df39cd70600cd0c9dc411adb622af86287b612f78be2a23b352c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
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 36 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\_internal\_decimal.dll,#1
    1⤵
      PID:3896
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1796
      • 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:5252
    • 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:668
    • 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:5080
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k GPSvcGroup
      1⤵
        PID:572

      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

            memory/668-45-0x000001B003D70000-0x000001B003D90000-memory.dmp
            Download

            memory/668-66-0x000001B014290000-0x000001B0142B0000-memory.dmp
            Download

            memory/668-31-0x000001B003A30000-0x000001B003A50000-memory.dmp
            Download

            memory/668-20-0x000001B0001E0000-0x000001B0002E0000-memory.dmp
            Download

            memory/668-33-0x000001B013E90000-0x000001B013F90000-memory.dmp
            Download

            memory/5080-188-0x0000020A80700000-0x0000020A809BC000-memory.dmp
            Download

            memory/5080-198-0x0000020A80700000-0x0000020A809BC000-memory.dmp
            Download