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Analysis

  • max time kernel
    152s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/01/2024, 06:03

General

  • Target

    2024-01-09_ef678a12fcf2b0f30b25dc3a74cfcd9b_cryptolocker.exe

  • Size

    72KB

  • MD5

    ef678a12fcf2b0f30b25dc3a74cfcd9b

  • SHA1

    81de6b93ad77f3b858aac83326b40b089a528a2b

  • SHA256

    cbece3b3d9a800bb9ec19025a85549e70d0a788e8d78c263544f754f5c7eec1c

  • SHA512

    e3bd05163b2f70d238f48df8da9fba7c5702b88496c0d28f6e7a6dc7311a2590fd248195118d8c6f6f9bd42ee9ebbe0105e28597fe54d7e41392edac9208d162

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdOyJ3KK:ZVxkGOtEvwDpjcaZ

Score
7/10

Malware Config

Signatures

  • 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\2024-01-09_ef678a12fcf2b0f30b25dc3a74cfcd9b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-09_ef678a12fcf2b0f30b25dc3a74cfcd9b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3268
    • 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:3068

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    38aac3612cad49526b15e71b8606a1a2

    SHA1

    18637839b48bf0a1151bb999aa70db30209c1cf7

    SHA256

    0075b896058066c169461bd7bcd233a3bff3cf675f740f2ad593d2dfc04972f9

    SHA512

    60b5acdb9b71578f753b652a68d9037dfa8f188420299115a4865298db9986875ef0901fa2feb409d18a817becd3cbeb0fe9b40d1a9bf5722f9d8690cc404816

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3068-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3068-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3268-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/3268-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/3268-2-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/3268-3-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/3268-14-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB