Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/05/2024, 00:42

General

  • Target
    2024-05-24_ba7cbc1a8dc6e2a58d1d49352df43562_cryptolocker.exe
  • Size 42KB
  • Sample240524-a2t4rsfa31
  • SHA256 6983c69fabd76b78e6b89a8216ae75a29fd474ea4ffac5f26e845e6be8bba83f
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-05-24_ba7cbc1a8dc6e2a58d1d49352df43562_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_ba7cbc1a8dc6e2a58d1d49352df43562_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3152
    • 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:2772

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 42KB
        • SHA256 0658095b8b6ffd11a8e1d5d5ddfc1360bcca1b19a43cfb638cbeb467ed97e28f
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2772-18-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/2772-20-0x0000000000520000-0x0000000000526000-memory.dmp

        memory/2772-21-0x00000000020F0000-0x00000000020F6000-memory.dmp

        memory/2772-52-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/3152-0-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/3152-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/3152-2-0x0000000000660000-0x0000000000666000-memory.dmp

        memory/3152-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/3152-16-0x0000000000500000-0x000000000050F000-memory.dmp