Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 09:47

General

  • Target
    2024-06-03_fbe1474efd8bc4e965a0261e4f65b6bc_cryptolocker.exe
  • Size 82KB
  • Sample240603-lr6klabg42
  • SHA256 7c2be7da97b7e35749cef186c029f7068fe398cfe59a4962a6df0348c8d05d38
  • 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\2024-06-03_fbe1474efd8bc4e965a0261e4f65b6bc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_fbe1474efd8bc4e965a0261e4f65b6bc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4888
    • 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:3284

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 82KB
        • SHA256 df6159e0c701c55332d267fdddfe64e20f1664c2b3e9c173847513fcda350e97
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/3284-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/3284-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/4888-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4888-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/4888-8-0x00000000004D0000-0x00000000004D6000-memory.dmp