Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 04:51

General

  • Target
    2024-01-24_e237fd2e79763da92f52dbc5d1ccaddb_cryptolocker.exe
  • Size 60KB
  • Sample240124-fg73sabcg6
  • SHA256 17742c5da9e232b6adbce71200e4c3e951689f03c7651a637d82b44ca06a599c
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 7 IoCs
  • Detection of Cryptolocker Samples 7 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\2024-01-24_e237fd2e79763da92f52dbc5d1ccaddb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_e237fd2e79763da92f52dbc5d1ccaddb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:840
    • 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:4748

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 22KB
        • SHA256 5cb73f860bf80737956d41cdbfa31855f012dff31db3f5a6c2df15d1c21bf557
        • MD5 SHA1 SHA512 SSDEEP

        misid.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
        • Size 13KB
        • SHA256 d08b1a5f0c8b21a6f7c206f945b655cc10b64d932e6f64c5b7b8941ac9f9a527
        • MD5 SHA1 SHA512 SSDEEP

        misid.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
        • Size 23KB
        • SHA256 2c4faa2f10d0367b399b01664c0a81226ea512b49a250adc3eabeb3b32ce16dd
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/840-1-0x0000000002210000-0x0000000002216000-memory.dmp

        memory/840-18-0x0000000000500000-0x000000000050E000-memory.dmp

        memory/840-0-0x0000000000500000-0x000000000050E000-memory.dmp

        memory/840-2-0x0000000002210000-0x0000000002216000-memory.dmp

        memory/840-3-0x0000000002230000-0x0000000002236000-memory.dmp

        memory/4748-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4748-17-0x0000000000500000-0x000000000050E000-memory.dmp

        memory/4748-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/4748-49-0x0000000000500000-0x000000000050E000-memory.dmp