Analysis

  • max time kernel
    135s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/05/2024, 04:03

General

  • Target

    2024-05-25_a645d8fe9b44b8fd2f6897e149e4e2f4_cryptolocker.exe

  • Size

    53KB

  • MD5

    a645d8fe9b44b8fd2f6897e149e4e2f4

  • SHA1

    0eeb25b1c3fb21c4639f8c0415cd91ab8fa6eee7

  • SHA256

    5b719884c118553c5661fe572322c3d587bfa50e1f0003b13d0c934459612964

  • SHA512

    2f2ba10b81ce4803a32aea628626c73e5fe2b4a7de044b0bd4ec2b90816b6c118c2274175a4da024b676c1047f1dfba3ffb435b5cfa908a13668ce102c8ed483

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRkH8:6j+1NMOtEvwDpjr8hhXic

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-25_a645d8fe9b44b8fd2f6897e149e4e2f4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_a645d8fe9b44b8fd2f6897e149e4e2f4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:464
    • 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:3108

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    54KB

    MD5

    28f96669a1443b3bc624f80093f818b3

    SHA1

    b0f775864240ab2e2326b6f8c1c1ccc40e0c8359

    SHA256

    cc38d13bc57ec23631562211387b6f0584a2240472e34316554a3ffb676dfbe9

    SHA512

    4ac11a3d63fb766e5de7df40e3c9543d32edbfb4fe82fd3d99299a790fe33b2698c34da49d6ba356bd3a35395a32e615839adff22eed54b500121ba5ac39636a

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/464-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/464-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/464-2-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/464-3-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/464-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3108-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3108-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3108-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3108-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB