Analysis

  • max time kernel
    88s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 01:00

General

  • Target

    2024-02-14_d7a3fde46dcaaac056c67ab4e2d5e5d3_cryptolocker.exe

  • Size

    126KB

  • MD5

    d7a3fde46dcaaac056c67ab4e2d5e5d3

  • SHA1

    5ded03477a538b22ca16f02bdce69d3cec948596

  • SHA256

    508469f03086f5bd339fd8399b34aa866a13acdb18d911fff7e0c24ba44c7d96

  • SHA512

    5e2dea93ebc984430b32cbf3e9088d0c324013c6524d9a28c220d6d3d4efdf3206456d85f6b2cf0c139d0392a284a3be9fc2b11e388088d3d9fca7c200e393b0

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpi:vCA9OtEvwDpjG

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-14_d7a3fde46dcaaac056c67ab4e2d5e5d3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_d7a3fde46dcaaac056c67ab4e2d5e5d3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5000
    • 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:804

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    126KB

    MD5

    3e75f8bc7f9a6dde68191cdb9d536e3a

    SHA1

    bb72812fa232381c83255073fe182cf12d5d4f00

    SHA256

    8a7f2083d728adeba793015124b4fb25c923ba2c39be4402f1c499f885a9b609

    SHA512

    e7ef1a55ed1757eb23b716b42a57f8fc049312385e402b9e720af0e65da59134a3b4a3adf9035f69b71eec90db366d0abd1edbf1bb8d71d24929d377616ce764

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/804-17-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/804-18-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB

  • memory/5000-0-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/5000-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/5000-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB