Overview

overview

10

Static

static

10

client-build.exe

windows10-2004-x64

10

client-build.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    31/07/2026, 00:54

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General

  • Target
    client-build.exe
  • Size 81KB
  • Sample260731-a9edaatvdx
  • SHA256 c9a76edfeb90041f9bc49ec9ce9cfc8e3228d2f3a539447b68adfe3f9b893cb9
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoveryhiddenz_hvncpersistenceransomwarerat

Malware Config

Signatures

  • Family: Hiddenz's HVNC

    Hiddenz's HVNC is a remote administration tool that has a leaked builder.

    rathiddenz_hvnc
  • Detects HiddenzHVNC payload 1 IoCs
  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

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

  • Modifies registry class 37 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 IoCs
  • Suspicious use of FindShellTrayWindow 39 IoCs
  • Suspicious use of SendNotifyMessage 36 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 6 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\client-build.exe
    "C:\Users\Admin\AppData\Local\Temp\client-build.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2560
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:3356
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3652
  • 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:5228
  • 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:1488

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/1488-86-0x0000016893FA0000-0x0000016893FC0000-memory.dmp
        Download

        memory/1488-41-0x0000016880000000-0x0000016880100000-memory.dmp
        Download

        memory/1488-73-0x0000016883A80000-0x0000016883AA0000-memory.dmp
        Download

        memory/1488-49-0x00000168836A0000-0x00000168836C0000-memory.dmp
        Download

        memory/1488-50-0x0000016893AE0000-0x0000016893BE0000-memory.dmp
        Download

        memory/2560-2-0x0000000005150000-0x00000000051E2000-memory.dmp
        Download

        memory/2560-3-0x0000000005220000-0x00000000052BC000-memory.dmp
        Download

        memory/2560-4-0x0000000074390000-0x0000000074B4C000-memory.dmp
        Download

        memory/2560-5-0x0000000005A40000-0x0000000005FFA000-memory.dmp
        Download

        memory/2560-1-0x0000000000680000-0x000000000069A000-memory.dmp
        Download

        memory/2560-26-0x0000000074390000-0x0000000074B4C000-memory.dmp
        Download

        memory/2560-0-0x00000000743A2000-0x00000000743A3000-memory.dmp
        Download

        memory/3356-194-0x0000000008D10000-0x0000000008E9E000-memory.dmp
        Download