Analysis

  • max time kernel
    147s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    20-11-2021 07:53

General

  • Target

    image.exe

  • Size

    592KB

  • MD5

    e4cc7fb761fc4110b631dbabf46363e1

  • SHA1

    f433972fe7fb1b165eaedadb2d31193e94ba2d33

  • SHA256

    c0478341ec19cae4fd4093d53e9cc777210ad57122836f4aa911addeacc911f9

  • SHA512

    918178d680dadb3929a1a399717914fd3539925a933da42d259f0516c929f6241ab6fb3f8d1d7ee2d7b3f47758ec1455f4f6189f2a43ecc55fe4a45f2990ae65

Malware Config

Signatures

  • Kutaki

    Information stealer and keylogger that hides inside legitimate Visual Basic applications.

  • Kutaki Executable 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 64 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\image.exe
    "C:\Users\Admin\AppData\Local\Temp\image.exe"
    1⤵
    • Drops startup file
    • Loads dropped DLL
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:844
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
      2⤵
        PID:1248
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bkmqvfch.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bkmqvfch.exe"
        2⤵
        • Executes dropped EXE
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1816
    • C:\Windows\SysWOW64\DllHost.exe
      C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
      1⤵
      • Suspicious use of FindShellTrayWindow
      PID:1044

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bkmqvfch.exe

      MD5

      e4cc7fb761fc4110b631dbabf46363e1

      SHA1

      f433972fe7fb1b165eaedadb2d31193e94ba2d33

      SHA256

      c0478341ec19cae4fd4093d53e9cc777210ad57122836f4aa911addeacc911f9

      SHA512

      918178d680dadb3929a1a399717914fd3539925a933da42d259f0516c929f6241ab6fb3f8d1d7ee2d7b3f47758ec1455f4f6189f2a43ecc55fe4a45f2990ae65

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bkmqvfch.exe

      MD5

      e4cc7fb761fc4110b631dbabf46363e1

      SHA1

      f433972fe7fb1b165eaedadb2d31193e94ba2d33

      SHA256

      c0478341ec19cae4fd4093d53e9cc777210ad57122836f4aa911addeacc911f9

      SHA512

      918178d680dadb3929a1a399717914fd3539925a933da42d259f0516c929f6241ab6fb3f8d1d7ee2d7b3f47758ec1455f4f6189f2a43ecc55fe4a45f2990ae65

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bkmqvfch.exe

      MD5

      e4cc7fb761fc4110b631dbabf46363e1

      SHA1

      f433972fe7fb1b165eaedadb2d31193e94ba2d33

      SHA256

      c0478341ec19cae4fd4093d53e9cc777210ad57122836f4aa911addeacc911f9

      SHA512

      918178d680dadb3929a1a399717914fd3539925a933da42d259f0516c929f6241ab6fb3f8d1d7ee2d7b3f47758ec1455f4f6189f2a43ecc55fe4a45f2990ae65

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bkmqvfch.exe

      MD5

      e4cc7fb761fc4110b631dbabf46363e1

      SHA1

      f433972fe7fb1b165eaedadb2d31193e94ba2d33

      SHA256

      c0478341ec19cae4fd4093d53e9cc777210ad57122836f4aa911addeacc911f9

      SHA512

      918178d680dadb3929a1a399717914fd3539925a933da42d259f0516c929f6241ab6fb3f8d1d7ee2d7b3f47758ec1455f4f6189f2a43ecc55fe4a45f2990ae65

    • memory/844-56-0x00000000001B0000-0x00000000001BA000-memory.dmp

      Filesize

      40KB

    • memory/844-57-0x00000000758F1000-0x00000000758F3000-memory.dmp

      Filesize

      8KB

    • memory/844-55-0x00000000001B0000-0x00000000001B6000-memory.dmp

      Filesize

      24KB

    • memory/1044-69-0x0000000000370000-0x0000000000372000-memory.dmp

      Filesize

      8KB

    • memory/1044-70-0x0000000000730000-0x0000000000731000-memory.dmp

      Filesize

      4KB

    • memory/1248-58-0x0000000000000000-mapping.dmp

    • memory/1248-68-0x0000000002040000-0x0000000002042000-memory.dmp

      Filesize

      8KB

    • memory/1816-65-0x0000000000220000-0x000000000022A000-memory.dmp

      Filesize

      40KB

    • memory/1816-64-0x0000000000220000-0x0000000000226000-memory.dmp

      Filesize

      24KB

    • memory/1816-71-0x0000000003F71000-0x0000000004E1D000-memory.dmp

      Filesize

      14.7MB

    • memory/1816-62-0x0000000000000000-mapping.dmp