Analysis

  • max time kernel
    138s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 03:38

General

  • Target

    2024-01-27_9594241d9e52261ad71c599885d73816_cryptolocker.exe

  • Size

    53KB

  • MD5

    9594241d9e52261ad71c599885d73816

  • SHA1

    966f44e18570892c01063f734fbeab9d1bf61390

  • SHA256

    4bd2679b8ea3d7175e2c4e71f5fb1866086c87af1ba9217dca7849a5b133c691

  • SHA512

    6e4f0175742049b21b371ce2f899fba9c1014b01934ec5a33646698b05f539e6b2580419506bef28361d7d12f61c46301309f8e219cc37bee2d5d9052ff300d8

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4hdCW1nw71TkhsiPn1YFv0it2:vj+jsMQMOtEvwDpj5HH1nw73KOFsiY

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\2024-01-27_9594241d9e52261ad71c599885d73816_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_9594241d9e52261ad71c599885d73816_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3800
    • 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:1812

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    53KB

    MD5

    1c859f185223987a8c6de8c43972b1f9

    SHA1

    37cdf769f7ec172b3fe2827969f84433a35805d6

    SHA256

    bb40b7847dbba4e506e890a5770cd4fabf5975d1901a17be36ff70c322eb5c40

    SHA512

    4fd607a89cc0746a2e36a3d83c35a610e2f4b599f6166c626ed1eaf419e6ffb6d8f7b47b08e49f61222eebc4c4ee8dbd6d71a64464b2bc1d425c484d611543fa

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1812-17-0x0000000000870000-0x0000000000876000-memory.dmp

    Filesize

    24KB

  • memory/1812-20-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB

  • memory/3800-0-0x0000000000880000-0x0000000000886000-memory.dmp

    Filesize

    24KB

  • memory/3800-1-0x0000000000880000-0x0000000000886000-memory.dmp

    Filesize

    24KB

  • memory/3800-2-0x0000000002240000-0x0000000002246000-memory.dmp

    Filesize

    24KB