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Analysis

  • max time kernel
    134s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2024, 00:41

General

  • Target

    2024-05-22_d98f64be1cafbd12ea8531fb13102bc1_cryptolocker.exe

  • Size

    43KB

  • MD5

    d98f64be1cafbd12ea8531fb13102bc1

  • SHA1

    961ce2ef4b5b9a6dc89212b615aa5e71cea4a9b9

  • SHA256

    fd15572192244d709cb4c891e5d42a59cc6ac7d9c3d3eb6d632028e7b9f90e2e

  • SHA512

    53db98e36b4da88a6aafb77b7824cb456fce74a6dc9772d67bab119b8b3a895858fda463bdb609eb58156a38ab88e7ee92519302363f18c2a77426478e91ebec

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66TcS:vj+jsMQMOtEvwDpj5HW5scS

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\2024-05-22_d98f64be1cafbd12ea8531fb13102bc1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_d98f64be1cafbd12ea8531fb13102bc1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:404
    • 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:2076

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    43KB

    MD5

    c87b408ad90f2135df9017b91cb337e0

    SHA1

    23809ad56bf9b97128c53c0653d0ab87129fe7e9

    SHA256

    90b9cca1ebc81f135f06061715dba2e3f9f447e1b7a0f4b13564ad1d77029494

    SHA512

    e943eba5abe9591462de00bda761528d22eb081d74fd1750986f725dea102ea278d9501708551d88e93a0fee72761f2e7e746d04b482eaf4ec7fd2c64c5b44f9

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/404-0-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/404-1-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/404-8-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2076-17-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/2076-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB