Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 17:04

General

  • Target
    2024-05-31_03d29f2b5b747296ed57d7ccea57495f_cryptolocker.exe
  • Size 38KB
  • Sample240531-vk8wtafe38
  • SHA256 60f5244787828a82c59b0dec628971c311546d5354a2a0bbc25077961e9042a1
  • 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 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\2024-05-31_03d29f2b5b747296ed57d7ccea57495f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_03d29f2b5b747296ed57d7ccea57495f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4976
    • 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:2032

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 39KB
        • SHA256 1ba40045d0caba55a952c7f51f964d3b89923c6c83abd08d25a9772857a39c52
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2032-17-0x00000000005D0000-0x00000000005D6000-memory.dmp

        memory/2032-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

        memory/4976-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

        memory/4976-1-0x0000000002050000-0x0000000002056000-memory.dmp

        memory/4976-8-0x00000000021D0000-0x00000000021D6000-memory.dmp