Overview

overview

7

Static

static

3

loader.exe

windows10-2004-x64

7

loader.exe

windows11-ltsc_2024-x64

7

Analysis

  • user interaction
    yes
  • max time kernel
    148s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    28/09/2026, 21:58

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General

  • Target
    loader.exe
  • Size 18.0MB
  • Sample260928-1vxjesvbpg
  • SHA256 a849e0c7741599b0fd60392d0eeb5d83e215f4f90795af60bf1ad20bd530cb9c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
bootkitdefense_evasionexecutionpersistence

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

    execution
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 TTPs 1 IoCs
    defense_evasion
  • Executes a command shell one-liner 1 TTPs 1 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

    execution
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\loader.exe
    "C:\Users\Admin\AppData\Local\Temp\loader.exe"
    1⤵
    • Suspicious use of NtCreateThreadExHideFromDebugger
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious behavior: RenamesItself
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5104
    • C:\Users\Admin\AppData\Local\Temp\loader.exe
      "C:\Users\Admin\AppData\Local\Temp\loader.exe"
      2⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of WriteProcessMemory
      PID:760
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c powershell.exe -NoProfile -ExecutionPolicy Bypass -Command ^"^& { $encoded = 'QXBwIGluaXRpYWxpemF0aW9uIGVycm9yIDB4MTAz'; $text = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($encoded)); $text = $text.Replace('\n', [Environment]::NewLine); Add-Type -AssemblyName PresentationFramework; [System.Windows.MessageBox]::Show($text, 'sync.top', 'OK', 'Error', 'None', 'DefaultDesktopOnly') }^"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:2108
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "& { $encoded = 'QXBwIGluaXRpYWxpemF0aW9uIGVycm9yIDB4MTAz'; $text = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($encoded)); $text = $text.Replace('\n', [Environment]::NewLine); Add-Type -AssemblyName PresentationFramework; [System.Windows.MessageBox]::Show($text, 'sync.top', 'OK', 'Error', 'None', 'DefaultDesktopOnly') }"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Enumerates connected drives
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3276

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        __PSScriptPolicyTest_dcpv31fv.5by.ps1
        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dcpv31fv.5by.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        loader.exe
        • Path C:\Users\Admin\AppData\Local\Temp\loader.exe
        • Size 18.0MB
        • SHA256 aaca2fe279271d4b9b9d110e07876ef09d1dc2913c074c84dd3c30dde12665d6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/760-8-0x00007FF7BFD70000-0x00007FF7C1F5B000-memory.dmp
        Download

        memory/760-25-0x00007FF7BFD70000-0x00007FF7C1F5B000-memory.dmp
        Download

        memory/3276-22-0x00000296C35B0000-0x00000296C35D2000-memory.dmp
        Download

        memory/5104-0-0x00007FF7527C0000-0x00007FF7549AB000-memory.dmp
        Download

        memory/5104-7-0x00007FF7527C0000-0x00007FF7549AB000-memory.dmp
        Download