Analysis

  • max time kernel
    133s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/05/2024, 05:24

General

  • Target

    2024-05-24_10016e321ebdac187e52c7491639087e_cryptolocker.exe

  • Size

    66KB

  • MD5

    10016e321ebdac187e52c7491639087e

  • SHA1

    c2b034afa97d577a5891839897e9403edae180db

  • SHA256

    36cbae402419d78b1216ca5ebbc27bf7ed95ce8a9ef50b98e04012e986d7ae0a

  • SHA512

    a6cb5e29ab3729895d41b85193669d160d0f0e34557fd4fa26771dc1dae046e306ce8ba86d7bca3a98dfba045a7ce516d7f9956580ba5c9f2cbdbf2e57e38100

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyz:TCjsIOtEvwDpj5HE/OUHnSMY4

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-24_10016e321ebdac187e52c7491639087e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_10016e321ebdac187e52c7491639087e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4268
    • 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:1432

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          67KB

          MD5

          e214ad6c4131713a49beb732546614ac

          SHA1

          a0bd5000e325415bd097ecf41a1a7cfee8d88354

          SHA256

          148b83b6872dc79d2860a20101edf397fde48736840a4ed40d9dfe806b32d9c7

          SHA512

          c30b1ea0cfd112e673ff3086b144cb3a53e5a1b6f0e212ff5339757c34e88740ae748ffc50d0d705ca478038443cc6c54038d06b31d6386722626029745d0f3b

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1432-18-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/1432-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/1432-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/1432-49-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4268-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4268-1-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/4268-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

          Filesize

          24KB

        • memory/4268-9-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/4268-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB