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Analysis

  • max time kernel
    174s
  • max time network
    207s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/12/2022, 23:02

General

  • Target

    8c9066731dc635a9700bc2816377abfdcd409b7228f3b469eafa4fc575d567fc.exe

  • Size

    248KB

  • MD5

    3bfee2bd737f01f99c20dfbea28104b0

  • SHA1

    1fbb34899cfa374617b958b52ccfdadbf03b34c8

  • SHA256

    8c9066731dc635a9700bc2816377abfdcd409b7228f3b469eafa4fc575d567fc

  • SHA512

    ab19fe946d1b158b737912d48f30026c771059d7beaffe5231017f3d480c62c2dce58d05fd2e7a3671149f9e8a1d132b5d7a712912b3350b06eeac294d05a051

  • SSDEEP

    3072:dJw15W42t0z43JOFQfOTbjaoL7mZW0h/tlVu/T8cLBH:dJWW42t0z43JOFQfOO

Score
10/10

Malware Config

Signatures

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

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

  • Adds Run key to start application 2 TTPs 52 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\8c9066731dc635a9700bc2816377abfdcd409b7228f3b469eafa4fc575d567fc.exe
    "C:\Users\Admin\AppData\Local\Temp\8c9066731dc635a9700bc2816377abfdcd409b7228f3b469eafa4fc575d567fc.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1532
    • C:\Users\Admin\yoiav.exe
      "C:\Users\Admin\yoiav.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4692

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\yoiav.exe

    Filesize

    248KB

    MD5

    f9933bb520d0d6f1928e959c5e794edf

    SHA1

    075da9cff5a2f2c037103d1b7fc5c619de3aeb8c

    SHA256

    7258e7bac76b021e9a835ab4debca58e01304c3eb79a5f43abb7c5b93d1927f0

    SHA512

    cfbc2a77dad14235fc7d21ffa7c0421cdc3f6ae3eff2cbba88ca49a5834f4300b72229856d1b1ed0d4dfb888a718297e8f782bda30db265815dbb3580fc33548

  • C:\Users\Admin\yoiav.exe

    Filesize

    248KB

    MD5

    f9933bb520d0d6f1928e959c5e794edf

    SHA1

    075da9cff5a2f2c037103d1b7fc5c619de3aeb8c

    SHA256

    7258e7bac76b021e9a835ab4debca58e01304c3eb79a5f43abb7c5b93d1927f0

    SHA512

    cfbc2a77dad14235fc7d21ffa7c0421cdc3f6ae3eff2cbba88ca49a5834f4300b72229856d1b1ed0d4dfb888a718297e8f782bda30db265815dbb3580fc33548