Analysis

  • max time kernel
    89s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/02/2024, 21:42

General

  • Target

    2024-02-11_a131fffa62f9d02261712cfc440de263_cryptolocker.exe

  • Size

    44KB

  • MD5

    a131fffa62f9d02261712cfc440de263

  • SHA1

    266011a925ce46980b50c9870065b96d9abb15f9

  • SHA256

    e617b3dccc9f23ffade510064dc9182779886a310ac9a3b10a3978f5beb18666

  • SHA512

    c981a0c57f99b0e590593c2d68971b2c9a059af456e5f6f9f8cb2ad24f223c714d906e03f0bfa8b49383f6c90f63bc579069361f179bd27f5954f6f1cdeee98f

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsw:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1K

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-02-11_a131fffa62f9d02261712cfc440de263_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-11_a131fffa62f9d02261712cfc440de263_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2696
    • 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:3816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    44KB

    MD5

    74084f5a38ccb299fe8d7cc408644315

    SHA1

    eeaa6a1075a5a0f55911699900c17a6439f99a54

    SHA256

    874f6aaac2988abfdc8bc078d1c5f7f341facc0dff1f25200d4cc87f94cf2c20

    SHA512

    0e69a12ecc301e5f71e57d676651bd0d9aefa3811f9f296dea8765ba3278fa5673ed3fc8f5ea6160485991125ed38272b04726fd293d8e44ea6f62b266e953e5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2696-0-0x0000000000490000-0x0000000000493000-memory.dmp

    Filesize

    12KB

  • memory/2696-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2696-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2696-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2696-17-0x0000000000490000-0x0000000000493000-memory.dmp

    Filesize

    12KB

  • memory/3816-19-0x0000000000460000-0x0000000000463000-memory.dmp

    Filesize

    12KB

  • memory/3816-20-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3816-23-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB