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Analysis

  • max time kernel
    88s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/02/2024, 14:56

General

  • Target

    2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe

  • Size

    59KB

  • MD5

    b1771fd91b44cc136d63a8d9cd4346b2

  • SHA1

    f076b81d28be9bcabc7a0568841d9a3d254964c4

  • SHA256

    ab45b21802c92cd561e3dc246e26ca541eeb7adccb3804debb36a186713a87eb

  • SHA512

    fb8f228fdb064eb165a563c0e8f620f79f203b40621ec784388d59492bf489a6ed9ef790ff9209ea5fc5c516707b8ffca3d8c7259e4bd0a01bf38d46c8dfa00c

  • SSDEEP

    1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHTdj:btng54SMLr+/AO/kIhfoKMHdU

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2588
    • C:\Users\Admin\AppData\Local\Temp\gewos.exe
      "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      PID:5112

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\gewos.exe

    Filesize

    59KB

    MD5

    9e3b1692bcac999180e82d32e5a0e518

    SHA1

    3deb634cddd36f8b5fe2e290b1b871af187ad84c

    SHA256

    de2a8cdb3dbc25724959adaf10df4cb525abea6fc3237dad3ba8f6d25e437591

    SHA512

    e6e611b9def7fc278f6abaaa46da24e17454ac025a79c6a1a854c7dff935e12ee69d135e81f8cbd5324469bab25c0912fffdfb9bc6097cbb345423b107d8844d

  • memory/2588-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/2588-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/2588-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/5112-20-0x0000000002090000-0x0000000002096000-memory.dmp

    Filesize

    24KB