Analysis

  • max time kernel
    96s
  • max time network
    124s
  • 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, 02:51

General

  • Target
    2024-06-11_3bcd499137a5751e33be732614829a6c_cryptolocker.exe
  • Size 44KB
  • Sample240611-dcb4fa1fpb
  • SHA256 a53fe8dbf1e2993eb6f4a435d2c37c4fdbda4838741d49f0a296f911065b1876
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-11_3bcd499137a5751e33be732614829a6c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_3bcd499137a5751e33be732614829a6c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1556
    • 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:1272

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 44KB
        • SHA256 bcee40cda18c00399a16be0dbd3ed23bdaa5e8aee92a674fbd799eec5a5519f1
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/1272-19-0x0000000002090000-0x0000000002096000-memory.dmp

        memory/1272-25-0x00000000004A0000-0x00000000004A6000-memory.dmp

        memory/1272-48-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/1556-0-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/1556-1-0x0000000002050000-0x0000000002056000-memory.dmp

        memory/1556-2-0x0000000002070000-0x0000000002076000-memory.dmp

        memory/1556-9-0x0000000002050000-0x0000000002056000-memory.dmp

        memory/1556-17-0x0000000000500000-0x000000000050F000-memory.dmp