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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/12/2023, 21:40

General

  • Target

    3dfa6cd18f872377c0e7f29e151c9d73.exe

  • Size

    220KB

  • MD5

    3dfa6cd18f872377c0e7f29e151c9d73

  • SHA1

    14d73e863f3c4e7d0b301096f54d81413c045a87

  • SHA256

    16edb433726e296fd8f3cde2e89d6d937e6a06f789120786e0ed3d10e3f639f9

  • SHA512

    0deb2d9c39eca9b85f796af768418d51fa3fb85bae183dd68ad3f440c5b28a37083cdfbb791f4bef1e94ccf6e73cca1d69399c349078d366c884e1e716247f60

  • SSDEEP

    3072:r5/2mS99vs6v5gVzaSCzJ0rJOz01JW69ZZ5qK:N2mS9l1gzRa0ryK

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\3dfa6cd18f872377c0e7f29e151c9d73.exe
    "C:\Users\Admin\AppData\Local\Temp\3dfa6cd18f872377c0e7f29e151c9d73.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:5012
    • C:\Users\Admin\beuiwen.exe
      "C:\Users\Admin\beuiwen.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:2548
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:636

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\beuiwen.exe

      Filesize

      220KB

      MD5

      3dfa6cd18f872377c0e7f29e151c9d73

      SHA1

      14d73e863f3c4e7d0b301096f54d81413c045a87

      SHA256

      16edb433726e296fd8f3cde2e89d6d937e6a06f789120786e0ed3d10e3f639f9

      SHA512

      0deb2d9c39eca9b85f796af768418d51fa3fb85bae183dd68ad3f440c5b28a37083cdfbb791f4bef1e94ccf6e73cca1d69399c349078d366c884e1e716247f60