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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 20:52

General

  • Target

    2024-05-31_fe0c76804f8578114f91e5ea666eae92_cryptolocker.exe

  • Size

    96KB

  • MD5

    fe0c76804f8578114f91e5ea666eae92

  • SHA1

    98632ddac0d8e37d5ccc7de2cd2afebaccae6b36

  • SHA256

    f6b41ae2a3e3d0699e224ebb074aaf456299d52d6cd625239d1c819e52ce0c49

  • SHA512

    6c1fb4c632ec5df8ccd9f3ec5372788d4dda0326ef7c9f24c5c792d220df2e345fa6513de7b0b1f9cfc35388afcf0ef74088f18e148cbd33c855b8acf5a33139

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRXrZSUfFKazNclMjNUvAcc:xj+VGMOtEvwDpjubwQEI8UtzNcO8Acc

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-31_fe0c76804f8578114f91e5ea666eae92_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_fe0c76804f8578114f91e5ea666eae92_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3164
    • 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:2420

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    97KB

    MD5

    0be4e1a85b070b0b6dc0f644c3a9efdd

    SHA1

    79970ee5dfc10807a08644eb6fe131bbf5ff5cf8

    SHA256

    b0ed3b8ab83db4dbbb9aac610ecf1ea92bde285e80090b0b754c2717b683d6da

    SHA512

    47c7d9057a508a85ee6ffb981ef40f0c01493bd6644abb16c8e4a26b5c03b0cf8aa861c142851798f2b492609ace58b427b15ecd3246931232f285ccfdfb8a4f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2420-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/2420-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2420-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3164-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3164-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3164-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3164-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3164-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB