Analysis

  • max time kernel
    89s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/02/2024, 01:50

General

  • Target
    2024-02-12_ecb183e5b67019efbac8f4d7c5d44fcf_cryptolocker.exe
  • Size 76KB
  • Sample240212-b9k2hagg56
  • SHA256 bde5155c6acdf8a57f38725b8b955141235a65b3aeebb3678ac41c4a101d4073
  • MD5 SHA1 SHA512 SSDEEP
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 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-12_ecb183e5b67019efbac8f4d7c5d44fcf_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-12_ecb183e5b67019efbac8f4d7c5d44fcf_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3052
    • 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:1276

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 76KB
        • SHA256 987722c254d13f9dbbdba1488dfa4270ed7517dc9e3391a6a29d745c9ceae4f5
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/1276-19-0x0000000000680000-0x0000000000686000-memory.dmp

        memory/1276-23-0x0000000000660000-0x0000000000666000-memory.dmp

        memory/1276-48-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3052-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3052-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/3052-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/3052-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

        memory/3052-17-0x0000000000500000-0x0000000000510000-memory.dmp