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Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 03:24

General

  • Target

    2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe

  • Size

    57KB

  • MD5

    0246340b9ca915387c85df4645c336ea

  • SHA1

    f6caeb7b4409bbac8811f3de63f3d9a066a8cfe0

  • SHA256

    72a34ac5aabd8009dbee2acd2fdb6be62bfb29fa16e65384e22887c46192ea85

  • SHA512

    bb4117d6d8c021fb13435b66f458fa601762b3a72c3781e773c6bc27d3e7c813bf6c2fab15ed0726b98f904de094aa0730a5be9dae9b9d4ad8f33fc2a5866d3f

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj9aYa9mpLI:z6a+CdOOtEvwDpjQP

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:704
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4232

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\asih.exe

    Filesize

    57KB

    MD5

    8c6cf5f4ac018b689f0108b5fbb21c74

    SHA1

    3a0eb306d4f4276742be8198ec27f0b3d2a23052

    SHA256

    624233c3f30ca1483fdf053baaa524e72cb6954b5d3d1ad986e7a7a140aa4f5e

    SHA512

    46da013d838d902a1c6770e7d7267a025051142589adba14ab3712c24a9b71caaaa0fa73cc88dc08e6f82d91394e85bd8fe07df195a9b00ff9fc43204b712842

  • memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/704-1-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/704-2-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/704-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4232-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4232-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4232-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB