Analysis

  • max time kernel
    136s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/05/2024, 15:33

General

  • Target

    2024-05-09_66173bfe099a87f101f42ec57d521ea1_cryptolocker.exe

  • Size

    62KB

  • MD5

    66173bfe099a87f101f42ec57d521ea1

  • SHA1

    b60ee84ec3ad5cc608884b62f7e2b4f8ea32c4d6

  • SHA256

    6da0b8759d7ea82ef06235d17e744b7400b67feaf0c85ea792ad28104a60e65d

  • SHA512

    185cbbfbfd21830228c0922f2eb0cc1f5bb7fda4909c540bb8c9c2b39fcc463ca5bc16e55bc6e8618ccbbcee6e4c806b8d623df31a9b6a9824f5911f4a0a4743

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMNuS8L:TCjsIOtEvwDpj5HE/OUHnSMZt

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-09_66173bfe099a87f101f42ec57d521ea1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_66173bfe099a87f101f42ec57d521ea1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1548
    • 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:4620

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          62KB

          MD5

          d8ab2996bad00d90c757eed7c2f41a5e

          SHA1

          e0e1a7f15dcdf8b9250c076132bbed1307879c0c

          SHA256

          d61d5e316849dd374299a5d7e0917fa6e892f2937f7d66e1400e88edffe0d671

          SHA512

          45ee5f066e8e15e564fb7fdf18863f3b1925d8fa5f290d838a7c457e47ea12ec30883f39ee01e9ea348a55d1137348957d15f0eee54a400da1a6ac3eaa0185fb

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1548-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/1548-1-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/1548-2-0x0000000000750000-0x0000000000756000-memory.dmp

          Filesize

          24KB

        • memory/1548-9-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/1548-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4620-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

          Filesize

          24KB

        • memory/4620-25-0x00000000020D0000-0x00000000020D6000-memory.dmp

          Filesize

          24KB

        • memory/4620-48-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB