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Analysis

  • max time kernel
    119s
  • max time network
    98s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/11/2024, 18:32

General

  • Target

    8b995fc841b62a3e324a68f58c03b13beea0d64fa9c4742a74bd862f5f477e05.exe

  • Size

    75KB

  • MD5

    e028c7a90bd94ea88e9f070030ad3b98

  • SHA1

    db25c77adab60b51861b961772987b781ba374f3

  • SHA256

    8b995fc841b62a3e324a68f58c03b13beea0d64fa9c4742a74bd862f5f477e05

  • SHA512

    3d38d4b04b011d9bb134353de3c603579966fd5c0ad40481de3f2566543b41b1c120c1b9d5ad391b533b140eb96a972e43a46f5bb4ab75bb16c66fafeed2b14b

  • SSDEEP

    1536:F4Qp441sjPEutHwHiHoHV/NBbgzrqNldFCnDNlN1t7gqi:+Qa4Yc/NBbgzrqNldFCnDNlN1Pi

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8b995fc841b62a3e324a68f58c03b13beea0d64fa9c4742a74bd862f5f477e05.exe
    "C:\Users\Admin\AppData\Local\Temp\8b995fc841b62a3e324a68f58c03b13beea0d64fa9c4742a74bd862f5f477e05.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4968
    • C:\Users\Admin\nuibuu.exe
      "C:\Users\Admin\nuibuu.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3532

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\nuibuu.exe

    Filesize

    75KB

    MD5

    eb39a633aa39bcb61c72e8e20cc29141

    SHA1

    57fdc30b0c895c1405f4abb89b96015206333eb0

    SHA256

    30a92edb3ea93eb6e1cafb143206a3f6aa3e66f9531fb53547e78d79e03bb7d4

    SHA512

    5d26192db9863d304754d1698cbeb051a50090bb3e7f75213139f5fdfdc534b26afc852d1eb4a550c82c935f93cd16bf4e1a4914bc62c3b3127ed874932eaa9d