Analysis

  • max time kernel
    153s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    01-07-2022 03:49

General

  • Target

    db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe

  • Size

    732KB

  • MD5

    a20059fdc62668a1bc68d5f1691b33de

  • SHA1

    6f86fab1c3f5897c46e7a8a9386214c1dd3be4da

  • SHA256

    db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841

  • SHA512

    5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

Malware Config

Signatures

  • Kutaki

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

  • Kutaki Executable 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
    "C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
      2⤵
        PID:5052
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe"
        2⤵
        • Executes dropped EXE
        • Maps connected drives based on registry
        • Suspicious use of SetWindowsHookEx
        PID:1600

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      732KB

      MD5

      a20059fdc62668a1bc68d5f1691b33de

      SHA1

      6f86fab1c3f5897c46e7a8a9386214c1dd3be4da

      SHA256

      db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841

      SHA512

      5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

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

      Filesize

      732KB

      MD5

      a20059fdc62668a1bc68d5f1691b33de

      SHA1

      6f86fab1c3f5897c46e7a8a9386214c1dd3be4da

      SHA256

      db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841

      SHA512

      5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

    • memory/1600-133-0x0000000000000000-mapping.dmp

    • memory/5052-132-0x0000000000000000-mapping.dmp