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Analysis

  • max time kernel
    115s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/03/2024, 17:26

General

  • Target

    d6b3a5bfe9dd5d995109042507d83f6b.exe

  • Size

    220KB

  • MD5

    d6b3a5bfe9dd5d995109042507d83f6b

  • SHA1

    4d2aa29b5dbc281551e2ae452963c519f2030580

  • SHA256

    23e3a74910e4ec43356db8b37524373a1687c901e55ac3452480769ec90d88de

  • SHA512

    6266f92c992c22aac8cf34bf89ca95627a284c05b5b16c487d3d8e878c4f9ea6107dc2adceba9d8e2cf5056d372c7b8a2f7ef13656fbf65eb18851137b382953

  • SSDEEP

    3072:Njwsq8qGAALc3uk85gVzaSCz7TG2KAikGFH+anvjW/JOGb:twXHGPL8uXgzqmhBi/Jj

Score
10/10

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 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 27 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d6b3a5bfe9dd5d995109042507d83f6b.exe
    "C:\Users\Admin\AppData\Local\Temp\d6b3a5bfe9dd5d995109042507d83f6b.exe"
    1⤵
    • Modifies visiblity of hidden/system files in Explorer
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3916
    • C:\Users\Admin\rbyuw.exe
      "C:\Users\Admin\rbyuw.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
      PID:3052
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4812

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\rbyuw.exe

      Filesize

      220KB

      MD5

      d6b3a5bfe9dd5d995109042507d83f6b

      SHA1

      4d2aa29b5dbc281551e2ae452963c519f2030580

      SHA256

      23e3a74910e4ec43356db8b37524373a1687c901e55ac3452480769ec90d88de

      SHA512

      6266f92c992c22aac8cf34bf89ca95627a284c05b5b16c487d3d8e878c4f9ea6107dc2adceba9d8e2cf5056d372c7b8a2f7ef13656fbf65eb18851137b382953