Overview

overview

8

Static

static

3

default.dat.exe

windows10-2004-x64

8

default.dat.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    139s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/07/2026, 16:56

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General

  • Target
    default.dat.exe
  • Size 13.6MB
  • Sample260708-vfwexsd16x
  • SHA256 240bd779d68fa536939d9eb47e61d78cdc760ad0dd8a885ed70c3077e44e13f5
  • 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
  • Loads dropped DLL 15 IoCs
  • 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 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 43 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:\Users\Admin\AppData\Local\Temp\default.dat.exe
    "C:\Users\Admin\AppData\Local\Temp\default.dat.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3260
    • C:\Users\Admin\AppData\Local\Temp\default.dat.exe
      "C:\Users\Admin\AppData\Local\Temp\default.dat.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1492
  • C:\Windows\explorer.exe
    explorer.exe /LOADSAVEDWINDOWS
    1⤵
    • 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:5304
  • 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:5144
  • 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:2332
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4384

    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 607B
          • SHA256 be6b74e52e5eef1f1c27c0976bf3bf1bfa99958c00bbef2898a602f691be6dae
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          VCRUNTIME140.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\VCRUNTIME140.dll
          • Size 117KB
          • SHA256 36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _bz2.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\_bz2.pyd
          • Size 82KB
          • SHA256 fc3b481684b926350057e263622a2a5335b149a0498a8d65c4f37e39dd90b640
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _ctypes.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\_ctypes.pyd
          • Size 128KB
          • SHA256 f63c6c7e71c342084d8f1a108786ca6975a52cefef8be32cc2589e6e2fe060c8
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _hashlib.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\_hashlib.pyd
          • Size 62KB
          • SHA256 838d5c8b7c3212c8429baf612623abbbc20a9023eec41e34e5461b76a285b86c
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _lzma.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\_lzma.pyd
          • Size 154KB
          • SHA256 d080eabd015a3569813a220fd4ea74dff34ed2a8519a10473eb37e22b1118a06
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _socket.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\_socket.pyd
          • Size 81KB
          • SHA256 35246b04c6c7001ca448554246445a845ce116814a29b18b617ea38752e4659b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _uuid.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\_uuid.pyd
          • Size 25KB
          • SHA256 f9d5008f0772aa0720bc056a6ecd5a2a3f24965e4b470b022d88627a436c1ffe
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          base_library.zip
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\base_library.zip
          • Size 1.3MB
          • SHA256 464d2a45f7ff63b56bb2a32767a73fc37a69f1a70b912ad990cac202cb59fb57
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          libcrypto-3.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\libcrypto-3.dll
          • Size 5.0MB
          • SHA256 4e5d5d20d6d31e72ab341c81e97b89e514326c4c861b48638243bdf0918cfa43
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          libffi-8.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\libffi-8.dll
          • Size 38KB
          • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _psutil_windows.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\psutil\_psutil_windows.pyd
          • Size 69KB
          • SHA256 0035450801bd7d938e9e146c5ec28e619cb5a5f4a18cdc53ac7e9734c7f94f78
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          pyarmor_runtime.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\pyarmor_runtime_000000\pyarmor_runtime.pyd
          • Size 625KB
          • SHA256 f9f6700491791fc700aa94172da6641ba04417790fe001f5dbc95e03c1f2311b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          python3.DLL
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\python3.DLL
          • Size 68KB
          • SHA256 a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          python313.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\python313.dll
          • Size 5.8MB
          • SHA256 0c0a66505093b6a4bb3475f716bd3d9552095776f6a124709c13b3f9552c7d99
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          select.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI32602\select.pyd
          • Size 30KB
          • SHA256 78e5994c29d8851f28b5b12d59d742d876683aea58eceea1fb895b2036cdcdeb
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/1492-182-0x0000000070180000-0x000000007022B000-memory.dmp
          Download

          memory/2332-243-0x0000014A91670000-0x0000014A917E6000-memory.dmp
          Download

          memory/5144-121-0x000001D514270000-0x000001D514290000-memory.dmp
          Download

          memory/5144-88-0x000001D503A30000-0x000001D503A50000-memory.dmp
          Download

          memory/5144-100-0x000001D503B90000-0x000001D503BB0000-memory.dmp
          Download

          memory/5144-77-0x000001D5001E0000-0x000001D5002E0000-memory.dmp
          Download

          memory/5144-89-0x000001D513EE0000-0x000001D513FE0000-memory.dmp
          Download