Analysis

  • max time kernel
    88s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 07:28

General

  • Target

    2024-02-13_1d9dfaf5b6a36d354e6611265d38b15c_cryptolocker.exe

  • Size

    36KB

  • MD5

    1d9dfaf5b6a36d354e6611265d38b15c

  • SHA1

    fae6649039d75bbefc1dd7fa3dd25fe2121cc239

  • SHA256

    6de9501b3816edb0b4aee90469e6ca8e5732cc67e3e20311428fb456473eab18

  • SHA512

    20403519658e3c9be9def87f1c05a8738870d8d4d26e3f2c428c1902e3fc79d55df47c62360cc1a872ce367d95481140baaa26404e15821973ad9e3f39093e15

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/UkRYOJB:vj+jsMQMOtEvwDpj5HcSYOf

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\2024-02-13_1d9dfaf5b6a36d354e6611265d38b15c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_1d9dfaf5b6a36d354e6611265d38b15c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3804
    • 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:1956

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          36KB

          MD5

          896659bd366488047918d1c20effbf68

          SHA1

          cf69f511a0b810b5be5ec42137f537126d3bf4d5

          SHA256

          ac3db7939685a3201608d6adee594c562c37f4f672ab619d71c145b5766e5282

          SHA512

          5be707e5cc03ae4d6da65d750577ae381e12e1bb83e9d611fe2b89e6cb8d6afdb77e47f93a59d14a649093e814bd019df03b51c0b129e86e9d2f30a10c7957c7

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1956-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/1956-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/3804-0-0x00000000005C0000-0x00000000005C6000-memory.dmp

          Filesize

          24KB

        • memory/3804-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

          Filesize

          24KB

        • memory/3804-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

          Filesize

          24KB