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Analysis

  • max time kernel
    144s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 01:29

General

  • Target

    2024-01-25_688c63508a1a98d7ad4b131251613ff4_cryptolocker.exe

  • Size

    38KB

  • MD5

    688c63508a1a98d7ad4b131251613ff4

  • SHA1

    f02ff2facb3f86254d29c5d9522f0a52d661cb68

  • SHA256

    d9dbdde376caa5535945321a0b0a1dc9af082166b0165422a58c1564a4458f9f

  • SHA512

    39d37d3f425c3a7c1744d02de5fdda53f611e1c654afe5acb73b2884e84e213ba238c49c9c80fda021883ae3330a7c395df8a7162d13b294dbfb20f0eaf9ebfb

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLtldJQB2:i5nkFGMOtEvwDpjn/JQ8

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-25_688c63508a1a98d7ad4b131251613ff4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_688c63508a1a98d7ad4b131251613ff4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4084
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:5232

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    99846a3d595bf7fa3c91de7840bbca78

    SHA1

    87a6a929565f416fb141bd7d77a9db62bb115e9b

    SHA256

    c1b80fba9d84795ee095096a8dae7000c536c5f619199c55acc594ffcfe4166a

    SHA512

    ee4409ef22557e15f3deca0c2079c4d03ca5d5d2f3b0069a6c3a4ddbd0b864a3ec61af1716a88fa131843a1a1ae2f9fe40c50cb130ad0a27f595d61a0b25a8cc

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4084-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4084-1-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/4084-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/4084-2-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/4084-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5232-19-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/5232-22-0x0000000000800000-0x0000000000806000-memory.dmp

    Filesize

    24KB

  • memory/5232-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB