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Analysis

  • max time kernel
    134s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 03:59

General

  • Target

    2024-06-03_c8a5490c242d8341ad533ba2d3c2eac8_cryptolocker.exe

  • Size

    69KB

  • MD5

    c8a5490c242d8341ad533ba2d3c2eac8

  • SHA1

    4a8ecdd42843cc4984f25feb3ab9f3b7739e3694

  • SHA256

    b04b39d2d999170110d39edec01af423f5bf53f8b6271a33f9cf33e988e2f4ec

  • SHA512

    a011a28ee9ee3d1bad6aa708adbd5a5450ae5b1489fe28199febc467aed14f390536281fbf79c58b1955c6f61ceaea1f118ff0eda073b41252a4986a853e3c78

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRXrZSUNsYD/dx:i5nkFGMOtEvwDpjNbwQEI8UZD7

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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\2024-06-03_c8a5490c242d8341ad533ba2d3c2eac8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_c8a5490c242d8341ad533ba2d3c2eac8_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:4568

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    69KB

    MD5

    653ad6b0f9e03710b094ad2b6f6cce5c

    SHA1

    7d91986f3a87a981a18f442906ef50ec87e24a94

    SHA256

    5c88f1671d7bc3e2c35a05a6cb2e9fc04e4cc76e5842eec6ac0c999cf54c239b

    SHA512

    2f3d329de5667692b43331cbc20584df7972994ee33b6a69c0c63b62669e073e0960e70ceb0421d25f35e911ec5c013bd81df3b9d7ad2af3d70a1cb9778e0872

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3164-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3164-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3164-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3164-9-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3164-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4568-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4568-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4568-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4568-51-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB