Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/03/2024, 04:36

General

  • Target
    2024-03-16_acc3b2cec910db1c16842a8626b3c83a_cryptolocker.exe
  • Size 76KB
  • Sample240316-e8qr5sdh75
  • SHA256 ec8d34a9205e227e02325eb8a9695eb2be27ee31c9d83cf92792f5e1e3021cab
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-03-16_acc3b2cec910db1c16842a8626b3c83a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-16_acc3b2cec910db1c16842a8626b3c83a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4620
    • 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:4956

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        misid.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
        • Size 76KB
        • SHA256 01d64e4d983ad1add10416b000e672d79f57417f488a4b2d7c757cc36981a2ce
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/4620-0-0x00000000004F0000-0x00000000004F3000-memory.dmp

        memory/4620-1-0x0000000002210000-0x0000000002216000-memory.dmp

        memory/4620-2-0x0000000002210000-0x0000000002216000-memory.dmp

        memory/4620-3-0x0000000002230000-0x0000000002236000-memory.dmp

        memory/4620-17-0x00000000004F0000-0x00000000004F3000-memory.dmp

        memory/4956-18-0x0000000000460000-0x00000000004A0000-memory.dmp

        memory/4956-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/4956-23-0x00000000004D0000-0x00000000004D6000-memory.dmp