Analysis

  • max time kernel
    91s
  • max time network
    125s
  • 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, 02:29

General

  • Target
    2024-06-11_f4d590783aa8198108ab47c243a25950_cryptolocker.exe
  • Size 82KB
  • Sample240611-cyvbga1bmc
  • SHA256 9650a7ffe07f58cb7d6a4faf613f0451ce0d593945d345b0fcb02cc6c6c6804f
  • 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\2024-06-11_f4d590783aa8198108ab47c243a25950_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_f4d590783aa8198108ab47c243a25950_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2684
    • 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:3336

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        misid.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
        • Size 83KB
        • SHA256 0f97b5f86658abd848caf9b8b31685316e64bd52032018e81d104d610acf9f13
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2684-0-0x0000000000620000-0x0000000000626000-memory.dmp

        memory/2684-1-0x0000000000750000-0x0000000000756000-memory.dmp

        memory/2684-8-0x0000000000620000-0x0000000000626000-memory.dmp

        memory/3336-23-0x0000000002050000-0x0000000002056000-memory.dmp

        memory/3336-17-0x0000000002070000-0x0000000002076000-memory.dmp