Analysis

  • max time kernel
    150s
  • max time network
    119s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250905-en
  • resource tags

    arch:x64arch:x86image:win11-20250905-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    14/10/2025, 15:57

General

  • Target
    .GJYDMIª.msi
  • Size 8.4MB
  • Sample251014-teekca1wbt
  • SHA256 551863be2e92aa2d319a92cda72bc2123233ee3a7e965ee691fd70d88c21d772
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs
  • Checks BIOS information in registry 2 TTPs 6 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs
  • Drops file in Windows directory 17 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 5 IoCs
  • Checks whether UAC is enabled 1 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\.GJYDMIª.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4760
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4952
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 343E087C1ED44792134EB3F0D83391F8
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:4220
    • C:\Users\Admin\AppData\Roaming\Leitor\Leitor Viw\exename.exe
      "C:\Users\Admin\AppData\Roaming\Leitor\Leitor Viw\exename.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Adds Run key to start application
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4092
      • C:\ProgramData\64E15EC580B377B973\exename.exe
        "C:\ProgramData\64E15EC580B377B973\exename.exe"
        3⤵
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Checks BIOS information in registry
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:1268
  • C:\ProgramData\64E15EC580B377B973\exename.exe
    C:\ProgramData\64E15EC580B377B973\exename.exe
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Executes dropped EXE
    • Checks whether UAC is enabled
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    PID:488

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e577bca.rbs

        • Path C:\Config.Msi\e577bca.rbs
        • Size 9KB
        • SHA256 81b4118f78061c28002cda7a5e46b4ad288a9174dea0d5d9b489c953615ded25
        • MD5 SHA1 SHA512 SSDEEP

        original_location.txt

        • Path C:\ProgramData\64E15EC580B377B973\original_location.txt
        • Size 62B
        • SHA256 b4477e23b6f63405d364f968251446c74659897609240e971641802886f45225
        • MD5 SHA1 SHA512

        MSI77a7f.LOG

        • Path C:\Users\Admin\AppData\Local\Temp\MSI77a7f.LOG
        • Size 20KB
        • SHA256 3eb9a34fb59017c24adc4460e7c4259a3efecb9b8dd08030159805e5d64a361d
        • MD5 SHA1 SHA512 SSDEEP

        exename.exe

        • Path C:\Users\Admin\AppData\Roaming\Leitor\Leitor Viw\exename.exe
        • Size 7.3MB
        • SHA256 ca49f2eaf6a2ad638ce7cf1453c9e2aef6b69e693b9f15496fbe6d563b53e8fd
        • MD5 SHA1 SHA512 SSDEEP

        MSI7C54.tmp

        • Path C:\Windows\Installer\MSI7C54.tmp
        • Size 1019KB
        • SHA256 15c35c5abf7bab8d1375f5622e31da14fd027ae1046b8a6ddfd74263fa34eda6
        • MD5 SHA1 SHA512 SSDEEP

        e577bc7.msi

        • Path C:\Windows\Installer\e577bc7.msi
        • Size 8.4MB
        • SHA256 551863be2e92aa2d319a92cda72bc2123233ee3a7e965ee691fd70d88c21d772
        • MD5 SHA1 SHA512 SSDEEP

        memory/488-48-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/488-47-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/488-51-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/488-67-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/1268-50-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/1268-49-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/1268-52-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/1268-65-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/4092-33-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/4092-32-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/4092-31-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/4092-53-0x0000000000400000-0x000000000146C000-memory.dmp

        memory/4952-66-0x000001A478600000-0x000001A4790C2000-memory.dmp