Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/06/2024, 01:18

General

  • Target

    2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe

  • Size

    40KB

  • MD5

    bbb707cda5d93d596ae50e1c1ba4f47d

  • SHA1

    9b785147a00c0d57f1bdf2aedd796f6aaf936287

  • SHA256

    c67dea1afa7f3d432a629c774762881ec1d83d118446ce5fc623102e93e93ea8

  • SHA512

    a138c11f99652a6a05a60789c717eb3f67a96c4f1ad428e1da1fbfe91d01332b56897b51c8aaee31dc9937839d07ba2d871a2885118b8c7b84a498f83911b9ff

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8t:qDdFJy3QMOtEvwDpjjWMl7Tdn8t

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_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3408
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:5000

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          41KB

          MD5

          f08b7c3e6c36d44ffef46bf2eff2c42e

          SHA1

          fcd5f4252e88d3e8c75208f799b47671aff45b6b

          SHA256

          8ac5fe0aeb16d569f6cfa127e15c2a80d0706eb3e948ad984010748514063591

          SHA512

          b9bbf5e59c1ba9213b934ba5949463c47c7ca64e49dd3a33fb7a8447c918bcc93aa0e253de34d3389ea1e30e0812e1ea16a256f9cd7299c3e0ed7e6eb6ec51c1

        • memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3408-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/3408-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/3408-3-0x0000000000670000-0x0000000000676000-memory.dmp

          Filesize

          24KB

        • memory/3408-16-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5000-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5000-20-0x0000000002110000-0x0000000002116000-memory.dmp

          Filesize

          24KB

        • memory/5000-26-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB