Analysis

  • max time kernel
    88s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/03/2024, 21:25

General

  • Target

    2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe

  • Size

    80KB

  • MD5

    1c4838eddedbada5ff0db04685b12c36

  • SHA1

    52cb5fc6db6ca71c527cae5736688e3972dcd8a9

  • SHA256

    8aa0ac24743e423e0647477a5d793169d43ad5c64c7e6d0563462baa50d58478

  • SHA512

    39eb65a86417c28d71f8c1515b5835d3103064aa58d8e1d5234b52725ed5a1698f0baf20e17358e805dde242d0a196b7c687de84a4fe2d99bf4cc8599b61a3a6

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1Y:zCsanOtEvwDpj+

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1244
    • 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:4424

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    80KB

    MD5

    9055c2c88b0426ab302a0c4baa17f560

    SHA1

    2a1f28fcc88cc00099c3f0e549c8b4327cb7b10a

    SHA256

    ccc8677e27df0b0bab2db140a0944db61c416acec77cd8bde714784c82ed306f

    SHA512

    55f74f4180b6f22e13145852c829e10256e04d211416dff6362e3b1c6f6918cc26727ae80d960381527ed47fc637df5470bcfcd0a44e0d147a042eaacdf59bc2

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1244-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1244-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/1244-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/1244-3-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB

  • memory/1244-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4424-19-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/4424-25-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4424-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB