Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 07:22

General

  • Target

    2024-02-14_083caa9fbb428d508f35048f0b52741f_cryptolocker.exe

  • Size

    126KB

  • MD5

    083caa9fbb428d508f35048f0b52741f

  • SHA1

    4bd4f1c08e3f76fdc6929ba8eb75f706722cbc3f

  • SHA256

    cf9eb21ce795335f7e299022d97f812de2143b105fb14e4a4b69a82ed7b3f480

  • SHA512

    52475f88c7df120f2bacf2eb128bc18787e66e1a75d4d38b927b5203f75e81899c26704aea60e2116208df934aa78dc942d400a90c72f3dc84cbc8d6190c0abf

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpR/gk:vCA9OtEvwDpjZ

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\2024-02-14_083caa9fbb428d508f35048f0b52741f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_083caa9fbb428d508f35048f0b52741f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5172
    • 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:4712

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          126KB

          MD5

          61d31c60a099d4ef21ee70458f98e927

          SHA1

          0c9c58daabdb574ecd6f202d6550ddbfbece3668

          SHA256

          cae7e9f962d4045f739c50de7b41f7e706ab8d2a73404d21392d31b16396ead7

          SHA512

          61e7229821f9bd73d2570b4b97f87943e5579fc3c7d6efe16548fa6ce6ca9bb1efe3cfa24f89660b4d362a45606a2286de057550595b5be4f7171d1fd856aa26

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/4712-18-0x00000000005C0000-0x00000000005C6000-memory.dmp

          Filesize

          24KB

        • memory/4712-17-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/5172-0-0x00000000005F0000-0x00000000005F6000-memory.dmp

          Filesize

          24KB

        • memory/5172-2-0x0000000002230000-0x0000000002236000-memory.dmp

          Filesize

          24KB

        • memory/5172-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

          Filesize

          24KB