Analysis

  • max time kernel
    152s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/01/2024, 19:37

General

  • Target

    a91ea79a692b6b7cdda92c6a588386f8.exe

  • Size

    512KB

  • MD5

    a91ea79a692b6b7cdda92c6a588386f8

  • SHA1

    d1acc93a5257f3c64bbec46bc923c66f78fc8353

  • SHA256

    d86d042c8681af6deee373b23f0dc4b3cdcfe4775aa73da1975a7f9ae733fa3a

  • SHA512

    9b440dc43a8a8c8fe82c3f2978b25af7f21fb24f21980fcdf93959d191cd562f917437c44052abb8ce2d153b56234dd4722f237f1fb7bf0223e7994a3dfff905

  • SSDEEP

    6144:1VY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bcodj6K:1gDhdkq5BCoC5LfWSLTUQpr2Zu19Qm5h

Malware Config

Signatures

  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 5 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Windows security modification 2 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Enumerates connected drives 3 TTPs 64 IoCs

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

  • Modifies WinLogon 2 TTPs 2 IoCs
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 9 IoCs
  • Drops file in Program Files directory 14 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 20 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of FindShellTrayWindow 18 IoCs
  • Suspicious use of SendNotifyMessage 18 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a91ea79a692b6b7cdda92c6a588386f8.exe
    "C:\Users\Admin\AppData\Local\Temp\a91ea79a692b6b7cdda92c6a588386f8.exe"
    1⤵
    • Checks computer location settings
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1120
    • C:\Windows\SysWOW64\holcfrgjhz.exe
      holcfrgjhz.exe
      2⤵
      • Modifies visibility of file extensions in Explorer
      • Modifies visiblity of hidden/system files in Explorer
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Windows security modification
      • Enumerates connected drives
      • Modifies WinLogon
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:5092
      • C:\Windows\SysWOW64\qhubutnh.exe
        C:\Windows\system32\qhubutnh.exe
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2304
    • C:\Windows\SysWOW64\qhubutnh.exe
      qhubutnh.exe
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1612
    • C:\Windows\SysWOW64\bnrsoiydnqglt.exe
      bnrsoiydnqglt.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:456
    • C:\Windows\SysWOW64\byyewlcsjyikndl.exe
      byyewlcsjyikndl.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1044
    • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
      "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Windows\mydoc.rtf" /o ""
      2⤵
      • Drops file in Windows directory
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      PID:3748

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1120-0-0x0000000000400000-0x0000000000496000-memory.dmp

          Filesize

          600KB

        • memory/3748-38-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-41-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-43-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-45-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-46-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-47-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-48-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-50-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-53-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-54-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-52-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-55-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-51-0x00007FFCA45B0000-0x00007FFCA45C0000-memory.dmp

          Filesize

          64KB

        • memory/3748-56-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-57-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-49-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-44-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-58-0x00007FFCA45B0000-0x00007FFCA45C0000-memory.dmp

          Filesize

          64KB

        • memory/3748-42-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-40-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-39-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-37-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-87-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-121-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-122-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-124-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-123-0x00007FFCA6610000-0x00007FFCA6620000-memory.dmp

          Filesize

          64KB

        • memory/3748-125-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-126-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB

        • memory/3748-127-0x00007FFCE6590000-0x00007FFCE6785000-memory.dmp

          Filesize

          2.0MB