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Analysis

  • max time kernel
    142s
  • 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
    21/05/2024, 04:49

General

  • Target

    2024-05-21_55024c56ce26804ec196a7f2787ef2c3_cryptolocker.exe

  • Size

    42KB

  • MD5

    55024c56ce26804ec196a7f2787ef2c3

  • SHA1

    f77464b7932f2dc4af352082acf8e991b1935248

  • SHA256

    f77de7e1d0ab9b15cf6da101f67b9bc81749fd42cd37cb11f0dcc1ffc4846161

  • SHA512

    1caa69fbc5d9cc4f69f83b05fb21ee8f962c236a1d80ddff54a40e2e17f8c02bf14bed33957bece213fd6f465cb1a8563b6e9bdcf30eead36d80268f08ac5414

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9Rva/yYsZnU:i5nkFGMOtEvwDpjR+viHsW

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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\2024-05-21_55024c56ce26804ec196a7f2787ef2c3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_55024c56ce26804ec196a7f2787ef2c3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4520
    • 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:4668

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    42KB

    MD5

    8886fbbbbe16a05005faf7ee0f62f1c3

    SHA1

    363dbd8cebf3837f7e9f69479b77e4db5fbbfd1f

    SHA256

    a194d9dbc241c02c8f4f20581d8fe2450ec2d9163075c10b3432e6f54672913a

    SHA512

    1cfcf219d64ad9d9aa5408666dd390724478a9bf7a3284231384e2cf9f16baad6df42958bad0fa1256c0b8aeb40899cb2b7cc5e5985f00a830a682a719c7406b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4520-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4520-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4520-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4520-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4520-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4668-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4668-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/4668-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4668-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB