Analysis

  • max time kernel
    120s
  • 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
    13-02-2024 18:12

General

  • Target

    2024-02-13_b56f43da8c7e41998306c6cebb0d6a73_cryptolocker.exe

  • Size

    39KB

  • MD5

    b56f43da8c7e41998306c6cebb0d6a73

  • SHA1

    3937ac574e5144612b7a46b085291a22c20888b4

  • SHA256

    d41dcfb2e9339b7c0694baca3436044a76bafa5337bb664506eed7fa3c67700c

  • SHA512

    4ca3cf2839a4e2610e7a1e8eb20b59dc9ecacbbeebb815b9f928426d667601276f658c9d0a3ba2bc37fb8db8052a366f0b31847de97822a8720724df97a83b5e

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLtldJQBgb:i5nkFGMOtEvwDpjn/JQI

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-02-13_b56f43da8c7e41998306c6cebb0d6a73_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_b56f43da8c7e41998306c6cebb0d6a73_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2920
    • 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:2064

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    3b21c3263732e6681c664b33f42672a0

    SHA1

    17fec6d0f141b64394c9151e2adc1db5cade6c18

    SHA256

    0b63409c19e93a1416084673cb1eefabf93423c2947c83244f41896492092221

    SHA512

    2d100d44bf76ca2bc086bd419c1d2c8b48739cec1c5b43a11f93c0fd3c072b3cd7054d41f82d0d71490a090beeb9410f57ffc243d7d455297691d8cd9173f6c3

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2064-21-0x0000000000740000-0x0000000000746000-memory.dmp

    Filesize

    24KB

  • memory/2064-19-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/2064-46-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2920-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2920-1-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2920-2-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2920-3-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/2920-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB