Analysis

  • max time kernel
    134s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/05/2024, 03:52

General

  • Target
    2024-05-07_e7797f71dc15f6a20a39e949bc169b4b_cryptolocker.exe
  • Size 37KB
  • Sample240507-ee8qvsgg8v
  • SHA256 1e2c40080346978f78958061e195cd6a3660c458e8a32c603be136ae5789b0e0
  • 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\2024-05-07_e7797f71dc15f6a20a39e949bc169b4b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-07_e7797f71dc15f6a20a39e949bc169b4b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2888
    • 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:3812

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 37KB
        • SHA256 d3c83a8ef39bb39e82bb373e59a70775199758f7b9fd212c830d26cc2d5c3ed2
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/2888-0-0x0000000002140000-0x0000000002146000-memory.dmp

        memory/2888-1-0x0000000002040000-0x0000000002046000-memory.dmp

        memory/2888-8-0x0000000002140000-0x0000000002146000-memory.dmp

        memory/3812-17-0x0000000000760000-0x0000000000766000-memory.dmp

        memory/3812-23-0x0000000000740000-0x0000000000746000-memory.dmp