Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-01-2024 17:29

General

  • Target

    2024-01-28_3f4ca7e5690a573d6fef5ad4bb50df8a_cryptolocker.exe

  • Size

    58KB

  • MD5

    3f4ca7e5690a573d6fef5ad4bb50df8a

  • SHA1

    11944f07a6f092a9e3bb0619645862ce5a491be1

  • SHA256

    85c818bef631c7b36d247dd28d5f4575f56de95849a390fc0aad80914b65fced

  • SHA512

    b37f57f13be0493f487920543982770f7a691695d510d21cde5d1e4f14d8a3b54b58787e0bb4f57e2626324792544c6f6f82b01b4e0f6ff002d391447e5fa3f9

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMY6:TCjsIOtEvwDpj5HE/OUHnSMq

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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\2024-01-28_3f4ca7e5690a573d6fef5ad4bb50df8a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_3f4ca7e5690a573d6fef5ad4bb50df8a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3820
    • 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:3364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    58KB

    MD5

    a021256ef1e150e0ae56b4318f2deebb

    SHA1

    fdb0b7349c4ab6fbcece3b6076fee1971a565c22

    SHA256

    244cb5f48562929fd1e71b93c863a8e67750b3b71aadf851d6c9f2cc3aad75d2

    SHA512

    dccaf586a58ba2dd597a1f49cc070d1986164afbc9e78da98a3cabcdde874a2aef6e4a52e55ae653cd23f7d356240ef8fd960f46cabfe833afa32546664525c1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3364-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3364-20-0x0000000002000000-0x0000000002006000-memory.dmp

    Filesize

    24KB

  • memory/3364-25-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/3364-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3820-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3820-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3820-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3820-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3820-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB