Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/06/2024, 01:26

General

  • Target

    2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe

  • Size

    40KB

  • MD5

    f70378e0cc1359fe1feaadc6df5c0a8f

  • SHA1

    93c05ba709ced15b19e5f323e1033a4303dd916c

  • SHA256

    c07b9815d241658c5388fb44aafac7d2a69bb46c57e8bd09faec098e1f96af3c

  • SHA512

    dae6edd6abe73ce77e25379ce8b7fa85d2fa60e79459ce532a4da22223501ae83d4d12b953ad27fe766ad7b86d2ff7f82e4be27c935767f7a51501f4f502a1ee

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9FF:qDdFJy3QMOtEvwDpjjWMl7T4

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_f70378e0cc1359fe1feaadc6df5c0a8f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:840
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4848

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          40KB

          MD5

          8a07d44a5dc8be7ceb822de387f2a699

          SHA1

          227f1a4fd3e6b8735025480dedf4eec88f1a3060

          SHA256

          c8c21c5242417462e1d8d67525da937ac522d74eabf9a97a0283b3919938037e

          SHA512

          3bfec6a39476ca87e98aca86231fead727dd96c3fe1a82b961f153b941e317a621700f6aed877af5fce8ab00cb80968c00384144e8f2166b985bdd0ef752d8d8

        • memory/840-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/840-1-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/840-2-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/840-9-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/840-19-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4848-16-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4848-21-0x0000000002100000-0x0000000002106000-memory.dmp

          Filesize

          24KB

        • memory/4848-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/4848-28-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB