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
    21-05-2024 15:39

General

  • Target

    2024-05-21_61f1d27da5ccdabfb55cbf301804945b_cryptolocker.exe

  • Size

    44KB

  • MD5

    61f1d27da5ccdabfb55cbf301804945b

  • SHA1

    cf9ed1bbf4144a664c2b480ae3f7552497785d2f

  • SHA256

    0e39192616e6b8afce47c03fe13d3bb6877c6017b9d649c51786eba796a0640d

  • SHA512

    d65e1f290087aed450b667f4310924c890fe78cff0ea855d216792767771f364df287c939d5d94e575093e804d4b25ceea4bbb1df2e9bb4fa8ca0202df15a8ec

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/CtXabM0Dl:6j+1NMOtEvwDpjrR2XabMQl

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-21_61f1d27da5ccdabfb55cbf301804945b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_61f1d27da5ccdabfb55cbf301804945b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1780
    • 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:640

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    20ec61392b997305f0d2a67e5cf9dc44

    SHA1

    d1245d8fda9694d014b32854b2f7ea5669fdabc0

    SHA256

    013792a3b31ff6daae7c6ed5a320daf42626c97295a8f0a4e1fbf3e434e34fcc

    SHA512

    ab2aca210d90e4963cdb014027d87fce316b7ca3d07a11e3dcb59a992378ab4d6f28918746b66fcab821efcac2d8d2dc94e435c1b61458da35aa6d1e2711f0e8

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/640-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/640-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/640-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/640-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/1780-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/1780-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1780-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1780-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1780-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB