Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 18:31

General

  • Target
    2024-05-27_5b9c0cd38a378e1fdcec7ee2cb0b6f8e_cryptolocker.exe
  • Size 48KB
  • Sample240527-w57d6aee46
  • SHA256 3e00d7c2a3e7bf76472f5c0783d4264f45da804040c8e818a3ee0b85baccb17c
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-27_5b9c0cd38a378e1fdcec7ee2cb0b6f8e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_5b9c0cd38a378e1fdcec7ee2cb0b6f8e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4884
    • 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:3776

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 48KB
        • SHA256 7599f288e5132e3c5fed925e26f96ab3dd65a214099772bc926442dee88c88ef
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3776-20-0x0000000000680000-0x0000000000686000-memory.dmp

        memory/3776-48-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/4884-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/4884-9-0x0000000000560000-0x0000000000566000-memory.dmp

        memory/4884-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/4884-1-0x0000000000560000-0x0000000000566000-memory.dmp

        memory/4884-17-0x0000000000500000-0x0000000000510000-memory.dmp