Analysis

  • max time kernel
    88s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/04/2024, 12:37

General

  • Target

    2024-04-08_71c0bd2da2837d9f3c04812de2662ceb_cryptolocker.exe

  • Size

    48KB

  • MD5

    71c0bd2da2837d9f3c04812de2662ceb

  • SHA1

    b6923cc7e5e73dca2c998ca4ff418cb33f85719c

  • SHA256

    df41af5e917d3a47826fd1b95408df098d0d230f8e3b1a622f960d7df9caae53

  • SHA512

    4282e11cc4165a38878b8fa8db5daa11107203e60b1e888c5c88546b9f14535dd0e9188c12424b3ac4c85a5a58693c20d7e95ed3ee946ffc0d5da48b740151d4

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRHnm:6j+1NMOtEvwDpjr8hhX9m

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-04-08_71c0bd2da2837d9f3c04812de2662ceb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-08_71c0bd2da2837d9f3c04812de2662ceb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5028
    • 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:3948

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          49KB

          MD5

          a3b0963c215abdbc591e9b8d193a034e

          SHA1

          c89403ed338717177c3792f1d02b4a1e1b8a0cbe

          SHA256

          f5489b3796c1b6eee03b85c78b715307527dbd4b9b6033fc62d6a57366074ea2

          SHA512

          c51b288a271ef9eca02298f7c60e477daf230c70c918653dab781863079f1e3b15be40c67970df0a5208b281d06fa353e201346b025d83c2543f7585700fab3d

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3948-19-0x0000000000860000-0x0000000000866000-memory.dmp

          Filesize

          24KB

        • memory/3948-21-0x0000000000840000-0x0000000000846000-memory.dmp

          Filesize

          24KB

        • memory/3948-48-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/5028-0-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/5028-1-0x0000000000600000-0x0000000000606000-memory.dmp

          Filesize

          24KB

        • memory/5028-2-0x0000000000600000-0x0000000000606000-memory.dmp

          Filesize

          24KB

        • memory/5028-3-0x0000000000620000-0x0000000000626000-memory.dmp

          Filesize

          24KB

        • memory/5028-17-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB