Analysis

  • max time kernel
    93s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/06/2024, 04:37

General

  • Target
    2024-06-13_fee1967187cb3f9fd9f9052ecc04880e_cryptolocker.exe
  • Size 73KB
  • Sample240613-e8y4hsxhrj
  • SHA256 9a3ddc1b6ed8f207eef5bc18454645bcbcd6f30721871c68059468edd2236a09
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-06-13_fee1967187cb3f9fd9f9052ecc04880e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_fee1967187cb3f9fd9f9052ecc04880e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5092
    • 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:1800

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 73KB
        • SHA256 e79c979e876efa4cea3ff47cdf283b8d8aac948eaf764cf570f84a7d35800e72
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/1800-19-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/1800-21-0x0000000000730000-0x0000000000736000-memory.dmp

        memory/1800-22-0x0000000000750000-0x0000000000756000-memory.dmp

        memory/1800-51-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/5092-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/5092-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/5092-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/5092-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/5092-18-0x0000000000500000-0x0000000000510000-memory.dmp