Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/06/2024, 00:41

General

  • Target
    2024-06-13_784b07d0c170ec422b165a8fd4b2a971_cryptolocker.exe
  • Size 44KB
  • Sample240613-a1zb4axejf
  • SHA256 fcaa3c12aabd6dd2553004da44875b14d8c0146185c54d062bb8111f6cd0d941
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • 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\2024-06-13_784b07d0c170ec422b165a8fd4b2a971_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_784b07d0c170ec422b165a8fd4b2a971_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2000
    • 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:4936

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 cdfa767096dbba86a9a827c8c20f699e87d2e04f6709da604eded1c48af0bbc2
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2000-0-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/2000-1-0x0000000000560000-0x0000000000566000-memory.dmp

        memory/2000-2-0x0000000002070000-0x0000000002076000-memory.dmp

        memory/2000-9-0x0000000000560000-0x0000000000566000-memory.dmp

        memory/2000-16-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/4936-17-0x0000000000500000-0x000000000050F000-memory.dmp

        memory/4936-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/4936-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4936-49-0x0000000000500000-0x000000000050F000-memory.dmp