Analysis

  • max time kernel
    91s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 22:26

General

  • Target

    2024-05-31_1ed7e4f9df235a2f98340c743eb31b3e_cryptolocker.exe

  • Size

    69KB

  • MD5

    1ed7e4f9df235a2f98340c743eb31b3e

  • SHA1

    93b377fc5d4e640c58160bba877d8a52fc10128e

  • SHA256

    e43ea98a64dd8a2da63c922062649834b7be8cbe9e912687671fb4bf7c4a3fcf

  • SHA512

    89d0f793e66b8545517fb56b7051c620f72a564a250f124e1230a99ef990c11689fb2d95500ef81783e3725b4fb564019f8dc0e36871bc998abcb6efcb224586

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRXrZSUNsYD/d/:i5nkFGMOtEvwDpjNbwQEI8UZDV

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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\2024-05-31_1ed7e4f9df235a2f98340c743eb31b3e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_1ed7e4f9df235a2f98340c743eb31b3e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2388
    • 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:3908

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          69KB

          MD5

          ecb8c60779a1484070ee4f38d5867d66

          SHA1

          ff4155c4b4965374a4c1d685f82ee7a85aea419c

          SHA256

          6573c4c48c1f558ce18de01d207969317e40a0995b2451491dd3153fbc8f7894

          SHA512

          6c4775d4bc3ec7704b733f6af83d99d7a5c18bb37871d416baa93f87ae8266c516c197de0298974c066ac507818079ae64c1a42dba597e0e924460a1876ab888

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2388-0-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/2388-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/2388-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/2388-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/2388-18-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/3908-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/3908-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3908-49-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB