Analysis

  • max time kernel
    92s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 18:22

General

  • Target
    2024-06-01_07be8f54aaa1261b1141ac0b7c32f7c8_cryptolocker.exe
  • Size 38KB
  • Sample240601-wzzgcsbf27
  • SHA256 453a757350f0a59d0ca7cb0f324c0432b9a6a86ee00771a2a0bacce8d32f3141
  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-01_07be8f54aaa1261b1141ac0b7c32f7c8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_07be8f54aaa1261b1141ac0b7c32f7c8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4796
    • 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:3292

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 a9c5b680f9280b53144190c95d1c40002cf0e009586f3416414ca1f012ae8004
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/3292-17-0x0000000001F70000-0x0000000001F76000-memory.dmp

        memory/3292-23-0x0000000001F50000-0x0000000001F56000-memory.dmp

        memory/4796-0-0x00000000005B0000-0x00000000005B6000-memory.dmp

        memory/4796-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

        memory/4796-8-0x00000000005B0000-0x00000000005B6000-memory.dmp