Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 07:44

General

  • Target
    2024-04-05_db8e69df2794a70d9b8600e35954c796_cryptolocker.exe
  • Size 40KB
  • Sample240405-jk595sfb56
  • SHA256 400531b588a8bf13cfa7f35b9155ee229b4ca187244639480e06a04a3761fde8
  • 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\2024-04-05_db8e69df2794a70d9b8600e35954c796_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_db8e69df2794a70d9b8600e35954c796_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1124
    • 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:3000

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 40KB
        • SHA256 14a5a321d229b9a4c3b0fbfd9b03759a82383a5facd3090cd3692adf39988c63
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/1124-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

        memory/1124-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/1124-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/1124-3-0x0000000002070000-0x0000000002076000-memory.dmp

        memory/1124-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

        memory/3000-19-0x0000000000450000-0x0000000000453000-memory.dmp

        memory/3000-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/3000-26-0x00000000004A0000-0x00000000004A6000-memory.dmp