Analysis

  • max time kernel
    138s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:30

General

  • Target

    2024-05-22_402e4d938f6497f2a307ea750037e8e7_cryptolocker.exe

  • Size

    40KB

  • MD5

    402e4d938f6497f2a307ea750037e8e7

  • SHA1

    1640b0a8d4e9bc783f2043e199b5ed6b3b4b3c78

  • SHA256

    9c1917a164145e98bf7b1f3b137ca6feff647796d32f016f7ebb324b1cd132e0

  • SHA512

    3c2d590f03a92d051f787f37d837f237b68d3cb72d32feabf678790c7cd109d9d37176944ead782afa8c43e1c901ceb689417239b07a0e038b41a050d58ecd25

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLeJAsKuDkB:ZzFbxmLPWQMOtEvwDpjLeJAsKce

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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_402e4d938f6497f2a307ea750037e8e7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_402e4d938f6497f2a307ea750037e8e7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1872
    • 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:3020

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    41KB

    MD5

    3b034197ee05992a3bb8327dc387d0c5

    SHA1

    288a38eaf76fc4f92b2543407366a05a6750b452

    SHA256

    986797d304456a65a117be754cdef12a94eb4fe51695ebe0bbf59c4fe4d00cc6

    SHA512

    d649cd1ada6bd64dddcd2812a49e09cab90bf3fa7bcb18c093fb35c232154465b60003543ffae4ab442a48da46d26ece2b69bf906cfa9bfc352ed82ef292a54c

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1872-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/1872-1-0x0000000000810000-0x0000000000816000-memory.dmp

    Filesize

    24KB

  • memory/1872-2-0x0000000002000000-0x0000000002006000-memory.dmp

    Filesize

    24KB

  • memory/1872-9-0x0000000000810000-0x0000000000816000-memory.dmp

    Filesize

    24KB

  • memory/1872-16-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/3020-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/3020-25-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB