Analysis

  • max time kernel
    150s
  • max time network
    125s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    06/10/2026, 14:05

General

  • Target
    jaffacakes118_Trojan-Downloader.Win32.Upatre.gxkz.exe
  • Size 2.8MB
  • Sample261006-rdzssafb89
  • SHA256 4eb1921f7ff89646d87bc516800b0e6e314ba32eea061e3003eec99bd2d7b393
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    http://api.kodeinml.ru/2.0/method/update

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Checks BIOS information in registry 2 TTPs 8 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Creates a file in the Startup directory 1 TTPs 2 IoCs

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

  • Executes dropped EXE 3 IoCs
  • Identifies Wine through registry keys 2 TTPs 4 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Executes a VBScript file via the Windows Script Host. 1 TTPs 3 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 4 IoCs
  • Drops file in Windows directory 2 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 8 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Kills process with taskkill 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Downloader.Win32.Upatre.gxkz.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Downloader.Win32.Upatre.gxkz.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4224
    • C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe
      "C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Identifies Wine through registry keys
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1332
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 30 /TN "Windows_Antimalware_Host" /TR "C:\ProgramData\WindowsAppCertification\checker.vbs" /F
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:6108
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 5 /TN "Windows_Antimalware_Host_Systm" /TR "C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe" /F
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4260
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c echo Set oWS = WScript.CreateObject("WScript.Shell") > CreateShortcut.vbs & echo sLinkFile = "%USERPROFILE%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Isass.lnk" >> CreateShortcut.vbs & echo Set oLink = oWS.CreateShortcut(sLinkFile) >> CreateShortcut.vbs & echo oLink.TargetPath = "C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe" >> CreateShortcut.vbs & echo oLink.Save >> CreateShortcut.vbs & cscript CreateShortcut.vbs & del CreateShortcut.vbs
        3⤵
        • Executes a command shell one-liner
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3664
        • C:\Windows\SysWOW64\cscript.exe
          cscript CreateShortcut.vbs
          4⤵
          • Creates a file in the Startup directory
          • Executes a VBScript file via the Windows Script Host.
          • System Location Discovery: System Language Discovery
          PID:2292
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im jaffacakes118_Trojan-Downloader.Win32.Upatre.gxkz.exe /f & erase C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Downloader.Win32.Upatre.gxkz.exe & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4560
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im jaffacakes118_Trojan-Downloader.Win32.Upatre.gxkz.exe /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2084
  • C:\PROGRA~3\MICROS~3\Windows\System32\Isass.exe
    C:\PROGRA~3\MICROS~3\Windows\System32\Isass.exe
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Executes dropped EXE
    • Identifies Wine through registry keys
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    PID:2960
  • C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe
    C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Executes dropped EXE
    • Identifies Wine through registry keys
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3192
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 30 /TN "Windows_Antimalware_Host" /TR "C:\ProgramData\WindowsAppCertification\checker.vbs" /F
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3476
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 5 /TN "Windows_Antimalware_Host_Systm" /TR "C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe" /F
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3348
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c echo Set oWS = WScript.CreateObject("WScript.Shell") > CreateShortcut.vbs & echo sLinkFile = "%USERPROFILE%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Isass.lnk" >> CreateShortcut.vbs & echo Set oLink = oWS.CreateShortcut(sLinkFile) >> CreateShortcut.vbs & echo oLink.TargetPath = "C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe" >> CreateShortcut.vbs & echo oLink.Save >> CreateShortcut.vbs & cscript CreateShortcut.vbs & del CreateShortcut.vbs
      2⤵
      • Drops file in Windows directory
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1484
      • C:\Windows\SysWOW64\cscript.exe
        cscript CreateShortcut.vbs
        3⤵
        • Creates a file in the Startup directory
        • Executes a VBScript file via the Windows Script Host.
        • System Location Discovery: System Language Discovery
        PID:3448
  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\ProgramData\WindowsAppCertification\checker.vbs"
    1⤵
    • Executes a VBScript file via the Windows Script Host.
    • Suspicious use of WriteProcessMemory
    PID:4144
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\ProgramData\WindowsAppCertification\cert.cmd" "
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:1052
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -WindowStyle Hidden -ExecutionPolicy Bypass -NoP -file C:\ProgramData\WindowsAppCertification\WindowHelperStorageHostSystemThread.ps1
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Enumerates connected drives
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4824

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        Isass.exe

        • Path C:\ProgramData\MicrosoftCorporation\Windows\System32\Isass.exe
        • Size 2.8MB
        • SHA256 4eb1921f7ff89646d87bc516800b0e6e314ba32eea061e3003eec99bd2d7b393
        • MD5 SHA1 SHA512 SSDEEP TLSH

        WindowHelperStorageHostSystemThread.ps1

        • Path C:\ProgramData\WindowsAppCertification\WindowHelperStorageHostSystemThread.ps1
        • Size 373B
        • SHA256 3d3f4f13c552d3db67cd1a9bd3484eb39089f946e0d008eb6ee777cf60a337d6
        • MD5 SHA1 SHA512 TLSH

        cert.cmd

        • Path C:\ProgramData\WindowsAppCertification\cert.cmd
        • Size 157B
        • SHA256 9ad1b0c67aa745cb2ab0f1238df71ba4f3b7742f572acf64d13c9876b34c42a2
        • MD5 SHA1 SHA512 TLSH

        checker.vbs

        • Path C:\ProgramData\WindowsAppCertification\checker.vbs
        • Size 112B
        • SHA256 6d02b3b430d85bd64bc3b4ade00e7cb2a474638517fb404fb459feb90980a522
        • MD5 SHA1 SHA512 TLSH

        CreateShortcut.vbs

        • Path C:\Users\Admin\AppData\Local\Temp\CreateShortcut.vbs
        • Size 301B
        • SHA256 e09cdf3b409359ce825a2f2d7374bfc0e2ec73918c0b8a99bf82020983b5f061
        • MD5 SHA1 SHA512 TLSH

        Isass.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Isass.lnk
        • Size 1KB
        • SHA256 287a453db6dc6111be676b7861498eb7324c277377bf464ce9cbb7c214d1431e
        • MD5 SHA1 SHA512 TLSH

        memory/1332-23-0x0000000003230000-0x0000000003231000-memory.dmp

        memory/1332-18-0x0000000002B50000-0x0000000002B51000-memory.dmp

        memory/1332-74-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/1332-62-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/1332-38-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/1332-12-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/1332-15-0x0000000003200000-0x0000000003201000-memory.dmp

        memory/1332-16-0x00000000031E0000-0x00000000031E1000-memory.dmp

        memory/1332-14-0x00000000031F0000-0x00000000031F1000-memory.dmp

        memory/1332-25-0x0000000002B60000-0x0000000002B61000-memory.dmp

        memory/1332-24-0x0000000003240000-0x0000000003241000-memory.dmp

        memory/1332-26-0x0000000003250000-0x0000000003252000-memory.dmp

        memory/1332-17-0x00000000031D0000-0x00000000031D1000-memory.dmp

        memory/1332-22-0x0000000002B30000-0x0000000002B31000-memory.dmp

        memory/1332-21-0x0000000002B80000-0x0000000002B81000-memory.dmp

        memory/1332-20-0x0000000003210000-0x0000000003211000-memory.dmp

        memory/1332-19-0x0000000002B40000-0x0000000002B41000-memory.dmp

        memory/2960-40-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/2960-51-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/3192-64-0x00000000001B0000-0x0000000000913000-memory.dmp

        memory/4224-9-0x0000000002E10000-0x0000000002E11000-memory.dmp

        memory/4224-8-0x0000000002E60000-0x0000000002E61000-memory.dmp

        memory/4224-1-0x00000000034D0000-0x00000000034D1000-memory.dmp

        memory/4224-7-0x00000000034F0000-0x00000000034F1000-memory.dmp

        memory/4224-10-0x0000000002E40000-0x0000000002E41000-memory.dmp

        memory/4224-6-0x0000000002E20000-0x0000000002E21000-memory.dmp

        memory/4224-5-0x0000000002E30000-0x0000000002E31000-memory.dmp

        memory/4224-13-0x0000000000D80000-0x00000000014E3000-memory.dmp

        memory/4224-3-0x00000000034B0000-0x00000000034B1000-memory.dmp

        memory/4224-2-0x00000000034C0000-0x00000000034C1000-memory.dmp

        memory/4224-0-0x0000000000D80000-0x00000000014E3000-memory.dmp

        memory/4224-4-0x00000000034E0000-0x00000000034E1000-memory.dmp

        memory/4824-45-0x000001BD36AA0000-0x000001BD36AC2000-memory.dmp