Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 09:46

General

  • Target

    2024-04-05_83ac3666a1ecb6a5bfde687f223d32c1_cryptolocker.exe

  • Size

    42KB

  • MD5

    83ac3666a1ecb6a5bfde687f223d32c1

  • SHA1

    83b95021ead7d3a7c4b73274f437b8dc1bf86d43

  • SHA256

    d58fbf9ee298945eb582c90b171b2531aa48bd785439c98015b8547ddaf912b7

  • SHA512

    ccede3e88a38e1455bd607452e4145b1471ae50f79c5a68cf49a99ef67d4890a1620490c48dfc06ae443b45b44054a95ffa742e9602fb26d1cee725297314b8c

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRpd:m5nkFNMOtEvwDpjG8hhXjd

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 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\2024-04-05_83ac3666a1ecb6a5bfde687f223d32c1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_83ac3666a1ecb6a5bfde687f223d32c1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3284
    • 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:916

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          42KB

          MD5

          9a1c1ea924e2baeacc6390c90223a0cc

          SHA1

          eb6d6a54e10bcb6649acea312d1289a9e355e79d

          SHA256

          cc093f7de0aa58aee373e33d9b03d44d5cd30c27c5125e2ad6f04c345406748a

          SHA512

          7cd23d162308760cb5b53f9cb951eb466bf53403242358d6402d3f82a3bb13b9f3c7fa490c726c47fad0ad77b4a1b263dbc8f217ca464a0306494cf9df0a528d

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/916-19-0x0000000001F80000-0x0000000001F86000-memory.dmp

          Filesize

          24KB

        • memory/916-25-0x0000000000530000-0x0000000000536000-memory.dmp

          Filesize

          24KB

        • memory/916-48-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/3284-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/3284-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

          Filesize

          24KB

        • memory/3284-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

          Filesize

          24KB

        • memory/3284-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

          Filesize

          24KB

        • memory/3284-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB