Analysis

  • max time kernel
    129s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/06/2024, 23:05

General

  • Target
    2024-06-02_43f822e9ebf1e535ad155826a2ca571a_cryptolocker.exe
  • Size 38KB
  • Sample240602-23cdwsbe54
  • SHA256 a934daaf4caeeed931391f5f51a424704b0949e18a298892be20704ddb3fdb36
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-06-02_43f822e9ebf1e535ad155826a2ca571a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_43f822e9ebf1e535ad155826a2ca571a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4596
    • 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:2656

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        misid.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
        • Size 38KB
        • SHA256 98ccdc776760de8ce08d9f86ad725bfe72dcb8643ea107764163e3723e7d4564
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misids.exe
        • Size 315B
        • SHA256 d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3
        • MD5 SHA1 SHA512

        memory/2656-23-0x0000000000560000-0x0000000000566000-memory.dmp

        memory/4596-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

        memory/4596-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

        memory/4596-8-0x00000000005A0000-0x00000000005A6000-memory.dmp