Analysis

  • max time kernel
    148s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 16:26

General

  • Target

    2024-01-26_6948220dc5828f93260b3d28928ec643_cryptolocker.exe

  • Size

    94KB

  • MD5

    6948220dc5828f93260b3d28928ec643

  • SHA1

    9bb6900a4c2c648d93e6796c33430a26602a679c

  • SHA256

    2a3d81d846eaa39955234ecd24f0899d9b785a1d04beb25602d8704f5ca3eb60

  • SHA512

    7627374be9652234e3cbfd4b02be08cab9791723261cd21156af8c708754a9e3f6b74416f31c4f7e2641651775dcc04769d96fd9c546390aebc38c9eddd4b17e

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJXxbAv:xj+VGMOtEvwDpjubwQEIiVmkhAv

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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\2024-01-26_6948220dc5828f93260b3d28928ec643_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-26_6948220dc5828f93260b3d28928ec643_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1612
    • 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:1716

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          94KB

          MD5

          664ce3e43ab5fca86a0c94fc41baf200

          SHA1

          7b0392a177f056a1eaf475a0d6fdd2a955df86e0

          SHA256

          32d64787ca6e4bed7a75628dc9ac3c3dd957cae769b566e8f62819c785725d32

          SHA512

          4c3b35a46eb73f957298f49788300ba6550932a0fe569d265130324e17430e082bff4217401189524c01ac6b2cca45344e022420536832e5dc544c6545acc93d

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1612-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/1612-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/1612-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/1612-3-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/1612-25-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/1716-19-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/1716-18-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/1716-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB