Analysis

  • max time kernel
    135s
  • max time network
    139s
  • 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, 18:26

General

  • Target
    2024-06-01_591e76dd1f35231887a39966c2148fb9_cryptolocker.exe
  • Size 69KB
  • Sample240601-w3prbsba31
  • SHA256 09d5aa573e53136fb60dbd62bf242901248d694afc52ab4c5105f685e7044c4f
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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\2024-06-01_591e76dd1f35231887a39966c2148fb9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_591e76dd1f35231887a39966c2148fb9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4820
    • 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:2332

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 69KB
        • SHA256 3743c1c52d6db73fc1cabd463faffec1900f97069ac53719da11c18c0b2b7534
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2332-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/2332-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/2332-50-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/4820-0-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/4820-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4820-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/4820-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4820-18-0x0000000000500000-0x000000000050F000-memory.dmp