Analysis

  • max time kernel
    137s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01-02-2022 02:19

General

  • Target

    c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe

  • Size

    816KB

  • MD5

    7179c01d287ea46e21056c636762968e

  • SHA1

    a415e62ffb1aa36634d5829e4860440f98623358

  • SHA256

    c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9

  • SHA512

    875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc

Malware Config

Signatures

  • Kutaki

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

  • Kutaki Executable 3 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.

  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe
    "C:\Users\Admin\AppData\Local\Temp\c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe"
    1⤵
    • Drops startup file
    • Loads dropped DLL
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1092
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
      2⤵
        PID:708
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tkmsbrch.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tkmsbrch.exe"
        2⤵
        • Executes dropped EXE
        • 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:1484

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      MD5

      7179c01d287ea46e21056c636762968e

      SHA1

      a415e62ffb1aa36634d5829e4860440f98623358

      SHA256

      c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9

      SHA512

      875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc

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

      MD5

      7179c01d287ea46e21056c636762968e

      SHA1

      a415e62ffb1aa36634d5829e4860440f98623358

      SHA256

      c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9

      SHA512

      875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc

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

      MD5

      7179c01d287ea46e21056c636762968e

      SHA1

      a415e62ffb1aa36634d5829e4860440f98623358

      SHA256

      c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9

      SHA512

      875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc

    • memory/708-59-0x00000000003D0000-0x00000000003D2000-memory.dmp

      Filesize

      8KB

    • memory/1092-56-0x0000000076121000-0x0000000076123000-memory.dmp

      Filesize

      8KB

    • memory/1484-60-0x00000000001A0000-0x00000000001A2000-memory.dmp

      Filesize

      8KB

    • memory/1484-61-0x0000000000500000-0x0000000000501000-memory.dmp

      Filesize

      4KB