Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/05/2024, 03:59

General

  • Target
    2024-05-25_8db0ef5b9fdef8996a18a313c3c52b5a_cryptolocker.exe
  • Size 54KB
  • Sample240525-ej2hcadg3y
  • SHA256 98a75a02b602652ad25a22e5e8f1936988ae4233f26155bddca44a14ba0c10ad
  • 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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-25_8db0ef5b9fdef8996a18a313c3c52b5a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_8db0ef5b9fdef8996a18a313c3c52b5a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4116
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3196

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        asih.exe

        • Path C:\Users\Admin\AppData\Local\Temp\asih.exe
        • Size 54KB
        • SHA256 3a5ab28ecdb4e40449a142da7a01dc276fcd6e75553d906c2e747838d50b12f0
        • MD5 SHA1 SHA512 SSDEEP

        memory/3196-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

        memory/3196-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4116-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/4116-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/4116-8-0x00000000006A0000-0x00000000006A6000-memory.dmp