Analysis

  • max time kernel
    93s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 18:54

General

  • Target

    2024-03-29_b0651cd62797baff786e3997cd246e3b_cryptolocker.exe

  • Size

    125KB

  • MD5

    b0651cd62797baff786e3997cd246e3b

  • SHA1

    e23e1cce2b17d31452f3fd49cf3a3ca5c21bdbe3

  • SHA256

    b5192d07cc40e25a481d6951df4aeb37ed2d238c5c04f6b9dbd53c7484818545

  • SHA512

    434b4525d80c92510a07c3828e91c5e43b15e2262ee279ceec2d121124a51f55ca77ab9db9c9ad25654c94b569ad5c5f003c3eee280b3f1dad436d653668e4df

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpt:vCA9OtEvwDpjx

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\2024-03-29_b0651cd62797baff786e3997cd246e3b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-29_b0651cd62797baff786e3997cd246e3b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2028
    • 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:2236

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\misid.exe

          Filesize

          125KB

          MD5

          bfd6fa4e12685283dc3f536b0e72b316

          SHA1

          6104efd7be4de8bf6835d26d214fc90d15444b9f

          SHA256

          27593d8a0ebab41b2963e7da23a4b24373e8b0ed29e03ad0b349d894f590c1f0

          SHA512

          0b9945b2241f85b5ed92dc5f7d0e0631f3747aff299b3e3077e335d6906d1af9b589572b305a1e028c4723db1be9ba7714ba8a5c5b20a2a24d876b56b13c46d0

        • C:\Users\Admin\AppData\Local\Temp\misids.exe

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2028-0-0x0000000002190000-0x0000000002196000-memory.dmp

          Filesize

          24KB

        • memory/2028-1-0x0000000002190000-0x0000000002196000-memory.dmp

          Filesize

          24KB

        • memory/2028-2-0x0000000002250000-0x0000000002256000-memory.dmp

          Filesize

          24KB

        • memory/2236-17-0x0000000000670000-0x0000000000676000-memory.dmp

          Filesize

          24KB

        • memory/2236-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB