Analysis

  • max time kernel
    130s
  • 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
    26-05-2024 01:04

General

  • Target

    2024-05-26_7868abff49cdaabf6cee20dcc0356618_cryptolocker.exe

  • Size

    58KB

  • MD5

    7868abff49cdaabf6cee20dcc0356618

  • SHA1

    8432fa0aeebd093d9ab84da9ba20735d19310c3b

  • SHA256

    faf55df04f4b114403c12439006b6bb8ac86e451c7192b6723af29c34c2ae1d8

  • SHA512

    85adaa236d6d31436420066b50618025eee54009d0030f592809fc0a80b1148e1b910fcfbf7026a5bc9fd447960e5fa86ec86cd73728294757be75718819e15e

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7GowfjSO:xj+VGMOtEvwDpjubEgr

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-26_7868abff49cdaabf6cee20dcc0356618_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_7868abff49cdaabf6cee20dcc0356618_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3392
    • 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:4964

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    58KB

    MD5

    b939cffb6df5e3e964109c438fb19329

    SHA1

    c5fd436b938a74e0158ecf3545365495f8a996f9

    SHA256

    c5bf0bf1d8f10b0951f1ffff72be04ac8b979eb662abb7df075909820a26fb43

    SHA512

    ef7b2085a8b3c3cc7710e08c191aba80d795b076b370c398bc7b7e6a23303898c44d5f9ca7d6ad79d6d8239574f7e8a3f83c91d62a0b38274155c5ce421d2bec

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3392-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3392-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3392-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3392-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3392-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4964-19-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/4964-25-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/4964-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB