Analysis

  • max time kernel
    148s
  • max time network
    150s
  • 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, 00:30

General

  • Target
    2024-06-11_451d71ba52aac5783440df37341df635_cryptolocker.exe
  • Size 74KB
  • Sample240611-atmdyswhle
  • SHA256 387437e673a4186f27a98264d8e6a33d3371567402e8f60689b5bc2a463a0284
  • 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-11_451d71ba52aac5783440df37341df635_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_451d71ba52aac5783440df37341df635_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1720
    • 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:3640

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 74KB
        • SHA256 c23d1d1ad4b884c2461f3c824c0ece2fb53e3fa2ab6ca81d51be39b63c9b408a
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/1720-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/1720-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/1720-4-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3640-16-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3640-26-0x0000000000500000-0x0000000000510000-memory.dmp