Overview

overview

8

Static

static

3

WorkshopDo...er.zip

windows10-2004-x64

3

WorkshopDo...er.zip

windows11-ltsc_2024-x64

8

DepotDownl...s.json

windows10-2004-x64

3

DepotDownl...s.json

windows11-ltsc_2024-x64

8

DepotDownl...od.exe

windows10-2004-x64

1

DepotDownl...od.exe

windows11-ltsc_2024-x64

8

DepotDownl...od.exe

windows10-2004-x64

1

DepotDownl...od.exe

windows11-ltsc_2024-x64

1

DepotDownl...od.pdb

windows10-2004-x64

3

DepotDownl...od.pdb

windows11-ltsc_2024-x64

8

DepotDownl...g.json

windows10-2004-x64

3

DepotDownl...g.json

windows11-ltsc_2024-x64

3

DepotDownl...ICENSE

windows10-2004-x64

3

DepotDownl...ICENSE

windows11-ltsc_2024-x64

3

DepotDownl...er.dll

windows10-2004-x64

1

DepotDownl...er.dll

windows11-ltsc_2024-x64

1

DepotDownl...t2.dll

windows10-2004-x64

1

DepotDownl...t2.dll

windows11-ltsc_2024-x64

1

DepotDownl...ng.dll

windows10-2004-x64

1

DepotDownl...ng.dll

windows11-ltsc_2024-x64

1

DepotDownl...rp.dll

windows10-2004-x64

1

DepotDownl...rp.dll

windows11-ltsc_2024-x64

8

DepotDownl...on.cfg

windows10-2004-x64

3

DepotDownl...on.cfg

windows11-ltsc_2024-x64

3

DepotDownl...re.dll

windows10-2004-x64

1

DepotDownl...re.dll

windows11-ltsc_2024-x64

1

DepotDownl...et.dll

windows10-2004-x64

1

DepotDownl...et.dll

windows11-ltsc_2024-x64

1

WorkshopDo...ro.exe

windows10-2004-x64

7

WorkshopDo...ro.exe

windows11-ltsc_2024-x64

7

SteamWorkS...py.pyc

windows10-2004-x64

3

SteamWorkS...py.pyc

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    599s
  • max time network
    530s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/09/2026, 05:02

Sharing

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Report Analysis Logs

General

  • Target
    DepotDownloaderMod/ZstdSharp.dll
  • Size 386KB
  • Sample260908-fn72cssbpc
  • SHA256 f0149a8f123c9ab8baf67df78096ba5b4d983c1030ad52ac1099a3f713eb60c0
  • 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 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 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\DepotDownloaderMod\ZstdSharp.dll,#1
    1⤵
      PID:3360
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k GPSvcGroup
      1⤵
        PID:4408
      • C:\Windows\system32\sihost.exe
        sihost.exe
        1⤵
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:1424
        • 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:3836
      • 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:3252
      • 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:4584

      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/3252-3-0x000001C2801E0000-0x000001C2802E0000-memory.dmp
            Download

            memory/3252-4-0x000001C2801E0000-0x000001C2802E0000-memory.dmp
            Download

            memory/3252-2-0x000001C2801E0000-0x000001C2802E0000-memory.dmp
            Download

            memory/3252-48-0x000001C294300000-0x000001C294320000-memory.dmp
            Download

            memory/3252-34-0x000001C282E00000-0x000001C282E20000-memory.dmp
            Download

            memory/3252-33-0x000001C282E40000-0x000001C282F40000-memory.dmp
            Download

            memory/3252-32-0x000001C282A20000-0x000001C282A40000-memory.dmp
            Download