Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/06/2024, 20:33

General

  • Target

    2024-06-06_64f865ebb668ea62169180a00348b5da_cryptolocker.exe

  • Size

    91KB

  • MD5

    64f865ebb668ea62169180a00348b5da

  • SHA1

    72f41cf764f58497f687df710181aa89f2ac279b

  • SHA256

    adad6176dd4dd8cdd816d166d961893c177bb027fb88ec44a3655fde5ffb38fb

  • SHA512

    b5f01240076d0f957865e283412be1b4b33e9f1900c143b3981e6e1efb5eaae80459d12f7f686ad09fd3ee0685d46d6e351275e68e1a7e1617f64f7a96d0d4c1

  • SSDEEP

    1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/yU:n6a+1SEOtEvwDpjYYvQd2P0

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\2024-06-06_64f865ebb668ea62169180a00348b5da_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-06_64f865ebb668ea62169180a00348b5da_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4592
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4992

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          91KB

          MD5

          7bd7b80d3645adf76abca4bef2fd4ed3

          SHA1

          215020a608b3772ff72eb893135fff693d1919f7

          SHA256

          0af71c04e5c7e634953933e40559f22162cb167661f82d878fc638652abb39e5

          SHA512

          40494ca15e7da91970258038e39f2beb78e3949534438b1e884809cd896920410fdbf24a0478bc9e1d59b7fcd4bba8d1dab99480e6c6bbcb78f51a78c9df5228

        • memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4592-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

          Filesize

          24KB

        • memory/4592-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

          Filesize

          24KB

        • memory/4592-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

          Filesize

          24KB

        • memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4992-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4992-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/4992-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/4992-27-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB