Analysis

  • max time kernel
    97s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/01/2024, 23:07

General

  • Target
    2024-01-18_984c804511eff0bd3eef043d2012aa54_cryptolocker.exe
  • Size 52KB
  • Sample240118-236yhafbc4
  • SHA256 ad7f4b3cc33c89e3470e163ab70fd723fe6ef3d9cfe5b818446d763c7c33ac22
  • 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\2024-01-18_984c804511eff0bd3eef043d2012aa54_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_984c804511eff0bd3eef043d2012aa54_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4400
    • 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:2524

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 52KB
        • SHA256 93fff24dbbc676a4293bfdcbcdf5a084adb7f8f874f49fc9fa9eea196f92f262
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2524-17-0x0000000002100000-0x0000000002106000-memory.dmp

        memory/2524-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/4400-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

        memory/4400-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

        memory/4400-2-0x00000000005E0000-0x00000000005E6000-memory.dmp