Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/08/2024, 06:55

General

  • Target

    2024-08-25_a76390fafba98b5d45bd1d8b9590515f_cryptolocker.exe

  • Size

    54KB

  • MD5

    a76390fafba98b5d45bd1d8b9590515f

  • SHA1

    098732ec09a85f89b887ecb3b092844ed33f2cd9

  • SHA256

    c41d4004f10d1594470160dd951d8d974fe1a5fa29025be7995b02eecd94106d

  • SHA512

    e0c7cf5c070a93de18b3acd878fb0fbc4c836cf63f651de30e2db123cd721f3e5f79bf5e1b5fcbf591ec9c4b6bb2de50c7d4dc865859e007d4161202da2bed2e

  • SSDEEP

    768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP8H:b7/y28wZEjbnouy8G76iH/NLpq

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-08-25_a76390fafba98b5d45bd1d8b9590515f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-08-25_a76390fafba98b5d45bd1d8b9590515f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:852
    • C:\Users\Admin\AppData\Local\Temp\rewok.exe
      "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3824

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          55KB

          MD5

          11964a9b6cfba36811d1d684bef72eaa

          SHA1

          5458addf44be51a158b3f3b3e16c29506ebde09f

          SHA256

          674d349b2b7bdd4be1d969e618107fceb3808e0064c96df90ee3ff8b54bb4d8a

          SHA512

          cc874f80dadd3a1ee2d109173e5d7423c1b4a9f8b16667603b79c1c9de335dab48b9952476d81ece5389e85fd7a76d70ecd8b99617cfcab312fd157105d95453

        • memory/852-0-0x0000000000400000-0x000000000040E000-memory.dmp

          Filesize

          56KB

        • memory/852-1-0x0000000002240000-0x0000000002246000-memory.dmp

          Filesize

          24KB

        • memory/852-2-0x0000000002240000-0x0000000002246000-memory.dmp

          Filesize

          24KB

        • memory/852-3-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3824-26-0x0000000002080000-0x0000000002086000-memory.dmp

          Filesize

          24KB