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Analysis

  • max time kernel
    141s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/05/2024, 14:54

General

  • Target

    2024-05-09_a8bd32eb638321e2f9df23f350f8fc05_cryptolocker.exe

  • Size

    47KB

  • MD5

    a8bd32eb638321e2f9df23f350f8fc05

  • SHA1

    679141d317d917b2338c4d2f01508a7aacadb681

  • SHA256

    1e279ab7ad6d6b9c760399dc41dacbc849934cca615c23b92bf0ef180251382d

  • SHA512

    37cbac7e9ddacec4b95fc0bc5eccc01a22cea0e669032f00700a138c9314d2d381ef65be2deda65362059f32c097f58d04cea10cc2ec415edea9a0a188dd9892

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9RzhwaRh+EP:xj+VGMOtEvwDpjy+TRh+EP

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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 7 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-09_a8bd32eb638321e2f9df23f350f8fc05_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_a8bd32eb638321e2f9df23f350f8fc05_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1572
    • 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:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    47KB

    MD5

    98d33bdfb8359aa0da0fcd88c0143f08

    SHA1

    5455a9a6fc28b34c72f2535d4954e091c34b039b

    SHA256

    01c528caf214d426e79c6a0ab577725c0e0743e220e70e73a5dd1691236c0dc3

    SHA512

    28963fe2d171ce2b2fa2fe7507a5e834ed3961dcd3d8c0b5f71bae750f8ae54e58d5446858fcb48f6f6ff63219adaf5754a6cf6ae5a115c6f96ff5d985131b43

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1572-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1572-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1572-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1572-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1572-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2696-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2696-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/2696-26-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2696-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB