Analysis

  • max time kernel
    132s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 22:52

General

  • Target

    2024-05-31_b38611f45488482842b9f374da296479_cryptolocker.exe

  • Size

    68KB

  • MD5

    b38611f45488482842b9f374da296479

  • SHA1

    ddb929c4dcb0c34617ff0db9955377043cb94d28

  • SHA256

    4ef3e7698a8a7667b2fa435e91c8cf30fee6770986720fc97bf1c9bbc0daa970

  • SHA512

    071e65f5eae2cff7c2cd4ce603db07c4350ac58b70ccf1ab7fb958b4a31d53b4fdecebac014f5b7b2974210e52dd4252255c9d104b8f39e775d4ed01d578487b

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyeP0:TCjsIOtEvwDpj5HE/OUHnSMYe

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\2024-05-31_b38611f45488482842b9f374da296479_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_b38611f45488482842b9f374da296479_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4872
    • 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:3632

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          68KB

          MD5

          29b5ef92ebf44df15972ff31c16aac9c

          SHA1

          e05c97987e92270d628dd4205532f255056177a3

          SHA256

          16e2b4437dd3bdddfa86ec42d8e683d8e0188fea486a57d2f540c946190d96f2

          SHA512

          c141ca8a79bf7be9e05e8907dd57e876540818d473eae6c9732e3b8dc9446308408d3984cbd49f5fadc04279bde7e4dfe479bed93168ef0b0c9314071d9dac02

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3632-19-0x0000000000750000-0x0000000000756000-memory.dmp

          Filesize

          24KB

        • memory/3632-25-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/3632-48-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4872-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4872-1-0x0000000000570000-0x0000000000576000-memory.dmp

          Filesize

          24KB

        • memory/4872-2-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/4872-9-0x0000000000570000-0x0000000000576000-memory.dmp

          Filesize

          24KB

        • memory/4872-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB