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Analysis

  • max time kernel
    94s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 13:43

General

  • Target

    2024-03-28_89e11e8fa5568a525765ffc8c541abe2_cryptolocker.exe

  • Size

    62KB

  • MD5

    89e11e8fa5568a525765ffc8c541abe2

  • SHA1

    21f5fa24ae96d6ac8135f1e721f96fb447a0bd42

  • SHA256

    e4f3dc698e938f1ef3d3d43ae9a501a25275da5c5f923280c6844bdbfe96fa08

  • SHA512

    2cbd4293012b602eefe71c82e5e67f9440d102fe8ef6b21f4b87c86eb7615d6a28faa5181038636ef9bca37e020812884dd54cc987a2dae3ea9b1c705db64830

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvBuP:TCjsIOtEvwDpj5HE/OUHnSMY3

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-03-28_89e11e8fa5568a525765ffc8c541abe2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_89e11e8fa5568a525765ffc8c541abe2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4760
    • 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:3436

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    7899c58395026dbb16ab6110491724d7

    SHA1

    b540e8a1c89caa059c44f0481e44b39c6fc8c765

    SHA256

    5d767504d3cc4e3e6c3a9684270513ff93a97075649cdf2a1f5eedde3a63d3a2

    SHA512

    c210e82b06f24fa143434362301224e6ddb6499c77b9c9efc463b54f98b176b5bbed9eabbb689aa13b4409c01ddb520ec1e2cb28ce444aa01673ff4be1102c74

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3436-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3436-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3436-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4760-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4760-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4760-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4760-3-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/4760-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB