Analysis

  • max time kernel
    132s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/10/2023, 19:47

General

  • Target

    NEAS.2023-09-08_f85ddecddd717424206f6d058d7c479d_cryptolocker_JC.exe

  • Size

    54KB

  • MD5

    f85ddecddd717424206f6d058d7c479d

  • SHA1

    4124559dd872847b8e354e0c292c1a00a5a5cb5f

  • SHA256

    a6f254c88ed96b6b9ed51d7446af637e59ce98ca1b73c44fa1c1084c8ba800f4

  • SHA512

    45ac5b44394b4f6fd2105a7f84a3b595d90a52d0614484ca412af1fefbb3f172cfa26470767a89663109f397288e05df72acf267d32606b885e507a4a6ba182b

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Goi20U:xj+VGMOtEvwDpjubEgV20U

Score
7/10

Malware Config

Signatures

  • 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\NEAS.2023-09-08_f85ddecddd717424206f6d058d7c479d_cryptolocker_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-08_f85ddecddd717424206f6d058d7c479d_cryptolocker_JC.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2796
    • 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:3512

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          55KB

          MD5

          a34602178e62bea646b627ddb66d4cad

          SHA1

          9edef00782fc959ed1107b1d91f8894b027878a9

          SHA256

          4b10d2410ace1d0118a3c068d8d3c8d43bf09d778e0f7750a9cc46cac21a6159

          SHA512

          a668310dfee3e2157e575780ba060586fa4e696b433d01cf0182fdc7049ffa4269ce982c4f63ea97758deb727daa531322a6595967f00cea0f330ca0b1ede7fd

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

          Filesize

          55KB

          MD5

          a34602178e62bea646b627ddb66d4cad

          SHA1

          9edef00782fc959ed1107b1d91f8894b027878a9

          SHA256

          4b10d2410ace1d0118a3c068d8d3c8d43bf09d778e0f7750a9cc46cac21a6159

          SHA512

          a668310dfee3e2157e575780ba060586fa4e696b433d01cf0182fdc7049ffa4269ce982c4f63ea97758deb727daa531322a6595967f00cea0f330ca0b1ede7fd

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

          Filesize

          55KB

          MD5

          a34602178e62bea646b627ddb66d4cad

          SHA1

          9edef00782fc959ed1107b1d91f8894b027878a9

          SHA256

          4b10d2410ace1d0118a3c068d8d3c8d43bf09d778e0f7750a9cc46cac21a6159

          SHA512

          a668310dfee3e2157e575780ba060586fa4e696b433d01cf0182fdc7049ffa4269ce982c4f63ea97758deb727daa531322a6595967f00cea0f330ca0b1ede7fd

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2796-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/2796-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/2796-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/2796-10-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3512-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/3512-20-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3512-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB