Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 18:31

General

  • Target

    2024-05-27_5b9c0cd38a378e1fdcec7ee2cb0b6f8e_cryptolocker.exe

  • Size

    48KB

  • MD5

    5b9c0cd38a378e1fdcec7ee2cb0b6f8e

  • SHA1

    75bd2418d1574694a694e970344074ae409442bc

  • SHA256

    3e00d7c2a3e7bf76472f5c0783d4264f45da804040c8e818a3ee0b85baccb17c

  • SHA512

    e324dc72331e3e197860b0421dcb23be75c9d3fbfd396635c32ffbf884dbd61bff6c95f4292933063fa205ac0c81949c6844c72fc0db8829ad6a5e7830930339

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9RzhwaRhAG:xj+VGMOtEvwDpjy+TRhN

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-05-27_5b9c0cd38a378e1fdcec7ee2cb0b6f8e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_5b9c0cd38a378e1fdcec7ee2cb0b6f8e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4884
    • 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:3776

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          48KB

          MD5

          3210f30123d3f2397ad126249fca1f76

          SHA1

          f0f65e4c71d1162c6b726b388fbe852ed791c770

          SHA256

          7599f288e5132e3c5fed925e26f96ab3dd65a214099772bc926442dee88c88ef

          SHA512

          44bab4c5a8cab9c6cf5acbec0a17802a696da7a58fe2fcaa164cb650110dd8353b8bfa644671e3c0f538b3fb952eb572518347f15eb0d8539e4425b8129b8998

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3776-20-0x0000000000680000-0x0000000000686000-memory.dmp

          Filesize

          24KB

        • memory/3776-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4884-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4884-9-0x0000000000560000-0x0000000000566000-memory.dmp

          Filesize

          24KB

        • memory/4884-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/4884-1-0x0000000000560000-0x0000000000566000-memory.dmp

          Filesize

          24KB

        • memory/4884-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB