Analysis

  • max time kernel
    153s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    01-07-2022 05:37

General

  • Target

    689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe

  • Size

    755KB

  • MD5

    77f193dbefdabd317c13e70d24fba155

  • SHA1

    efca7bcad227df76ba1f3997bc32a7e18c68999f

  • SHA256

    689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f

  • SHA512

    d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

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\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
    "C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4904
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
      2⤵
        PID:4004
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"
        2⤵
        • Executes dropped EXE
        • Maps connected drives based on registry
        • Suspicious use of SetWindowsHookEx
        PID:2188

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      755KB

      MD5

      77f193dbefdabd317c13e70d24fba155

      SHA1

      efca7bcad227df76ba1f3997bc32a7e18c68999f

      SHA256

      689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f

      SHA512

      d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

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

      Filesize

      755KB

      MD5

      77f193dbefdabd317c13e70d24fba155

      SHA1

      efca7bcad227df76ba1f3997bc32a7e18c68999f

      SHA256

      689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f

      SHA512

      d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

    • memory/2188-133-0x0000000000000000-mapping.dmp

    • memory/4004-132-0x0000000000000000-mapping.dmp