Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/06/2024, 21:45

General

  • Target

    2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe

  • Size

    54KB

  • MD5

    fa380a76cceb9950a6d99b32c43a8ef0

  • SHA1

    c4f042e606704e4adfae54ab0e5dd59c59613a94

  • SHA256

    79b5755194e74f9ab5d0ced5faf07fe921f565ebcb8723c7557568e176772b0d

  • SHA512

    ff6108a9d9738c2c6ff50fb0cdecf569acd984543b735af451acccf8b9128ce4f0ffac1dbfa9391821a234b6b1fd2d2670af716118582b0fc204b5ff2475f4ac

  • SSDEEP

    768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXS:bODOw9acifAoc+v9

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4412
    • C:\Users\Admin\AppData\Local\Temp\lossy.exe
      "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
      2⤵
      • Executes dropped EXE
      PID:1936

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          54KB

          MD5

          2dd375eeb03202c8bcf947ffa8ba88c9

          SHA1

          5472e469a5835f4ba9f2ee8d92899687a57be5c0

          SHA256

          4aee567c994c8ef96cd87ced07245c85e5d8da4e8833a4989a016d2f9e3392cb

          SHA512

          0994d8cda11384498a85eadcdd09591043ae567105a49a3a694ce49db890ae8cfa6d3c4d87beafbe88122422faf6ee17b3aff78577b44b52076808bd2dca9469

        • memory/1936-16-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB

        • memory/1936-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/1936-26-0x0000000000590000-0x0000000000596000-memory.dmp

          Filesize

          24KB

        • memory/1936-27-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB

        • memory/4412-0-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB

        • memory/4412-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/4412-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/4412-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/4412-17-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB