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Analysis

  • max time kernel
    77s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 01:12

General

  • Target

    2024-06-01_89398290a5fb395b597f916688b91de3_cryptolocker.exe

  • Size

    69KB

  • MD5

    89398290a5fb395b597f916688b91de3

  • SHA1

    9b174767085a3afd414b3080c4525a214bef6c81

  • SHA256

    135decb37049509861fa89774c73975ed842228001cdf63fdde54ee565d47a9d

  • SHA512

    64b4ae4c0b2ad8f28fbf5935aaca0c68c4338273de7d88c3a03b42f946807bb52026d5b5694cf5ff4da2ef30969f0b5463d101c4fef27027c7b363d10e84b2f1

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRXrZSUNsYD/d8X9:i5nkFGMOtEvwDpjNbwQEI8UZDet

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\2024-06-01_89398290a5fb395b597f916688b91de3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_89398290a5fb395b597f916688b91de3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3996
    • 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:5044

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    70KB

    MD5

    c05425ee08446d3be4ef329468dfad94

    SHA1

    5580c498b31102d9fb0b391a5af84373b7abc517

    SHA256

    1a5576706f7f0556eaa1072dafe5399b53b0f1dddcd791ab9e5c6335eb3bb249

    SHA512

    6c46397bfdfb1cb4690e041868900c804643bd55fb59e5f0444e8a8031386b8ed4e76b585f1842db58101a15d5acc1e30639a138696b7666e1e281844a65dc88

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3996-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3996-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3996-9-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3996-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3996-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5044-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5044-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/5044-50-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB