Analysis

  • max time kernel
    150s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    25-07-2022 14:42

General

  • Target

    55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe

  • Size

    795KB

  • MD5

    feaa99287f22b1fad4acdfec4481daa3

  • SHA1

    9e882b1037f36bb2ae131500954c16bc1f0aa26f

  • SHA256

    55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

  • SHA512

    13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

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
  • 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.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
    "C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe"
    1⤵
    • Drops startup file
    • Loads dropped DLL
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1660
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
      2⤵
        PID:1656
      • 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
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1932

    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

      795KB

      MD5

      feaa99287f22b1fad4acdfec4481daa3

      SHA1

      9e882b1037f36bb2ae131500954c16bc1f0aa26f

      SHA256

      55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

      SHA512

      13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

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

      Filesize

      795KB

      MD5

      feaa99287f22b1fad4acdfec4481daa3

      SHA1

      9e882b1037f36bb2ae131500954c16bc1f0aa26f

      SHA256

      55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

      SHA512

      13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

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

      Filesize

      795KB

      MD5

      feaa99287f22b1fad4acdfec4481daa3

      SHA1

      9e882b1037f36bb2ae131500954c16bc1f0aa26f

      SHA256

      55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

      SHA512

      13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

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

      Filesize

      795KB

      MD5

      feaa99287f22b1fad4acdfec4481daa3

      SHA1

      9e882b1037f36bb2ae131500954c16bc1f0aa26f

      SHA256

      55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

      SHA512

      13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

    • memory/1656-57-0x0000000000000000-mapping.dmp

    • memory/1660-56-0x00000000762B1000-0x00000000762B3000-memory.dmp

      Filesize

      8KB

    • memory/1932-60-0x0000000000000000-mapping.dmp

    • memory/1932-65-0x0000000003381000-0x000000000422D000-memory.dmp

      Filesize

      14.7MB