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Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/02/2024, 01:00

General

  • Target

    2024-02-20_f7c37f8878239741d4243f50479158cc_cryptolocker.exe

  • Size

    71KB

  • MD5

    f7c37f8878239741d4243f50479158cc

  • SHA1

    8d3b637a19688ee1ca246385a10d072a12feb179

  • SHA256

    a8f4150007d3d933b3fcade9ec948c456a4719d2c6d7110e18aaf6346e174317

  • SHA512

    98ca27ac2c5a4cbb97fe2a16170f9dc98613680d5803b609227fe5c32c33678f22f45d38e178065603c7f7d1bf300cf8a729ebeea579fb12d595bf5b1be14093

  • SSDEEP

    1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1eSi:X6a+SOtEvwDpjBZYvQd2c

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-20_f7c37f8878239741d4243f50479158cc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-20_f7c37f8878239741d4243f50479158cc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5012
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1200

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    a1a6c6c58c31e2a8e0e23948599143f7

    SHA1

    6a2f9fa471548c13d1ae9d4fb95039eadf14623a

    SHA256

    1d110a3b6b230ec8efec4e9081cbbeb53aae47cd21571c45acb29bfc70bf93ba

    SHA512

    a58055850e9c86f239961c9beae70884d718efac41c3fbd38ef2bd0284a9ce04fc7108c34290d87506b1d63fbb0e2f7cb2a74eb6f7d0c95e90a99c05cc301722

  • memory/1200-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/1200-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/5012-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5012-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5012-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB