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Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2024, 15:28

General

  • Target

    2024-05-22_8a017e8a4c4b2bd25bda9ea2a7ec6e46_cryptolocker.exe

  • Size

    44KB

  • MD5

    8a017e8a4c4b2bd25bda9ea2a7ec6e46

  • SHA1

    aa328fdd3fe196e0e9703bb672bb1c6dcdd6e15d

  • SHA256

    bdf1501fabe86800db860a5af2929f11aae30530c56d5d6b648924170f0d4f5f

  • SHA512

    f11af9e8d149eb5f395794ca4571217d62faa9728e1f2feb98f580efb539d2e6c89848dd96923b0dc8025a24f00d1d81951d2c1d9de7b52aa6c46d8d3cac0782

  • SSDEEP

    768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3KxX:o1KhxqwtdgI2MyzNORQtOflIwoHNV2Xy

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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-22_8a017e8a4c4b2bd25bda9ea2a7ec6e46_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_8a017e8a4c4b2bd25bda9ea2a7ec6e46_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4664
    • C:\Users\Admin\AppData\Local\Temp\hurok.exe
      "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      PID:3764

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    67c4ce5da9f55bcdf45e78664d972952

    SHA1

    6eacf2bb0e0a556d7a4c5d49692962a349d67a5f

    SHA256

    a1decf4eb35aec29819e65d06661078f9d5bb3702d7a094f72b548f2a2ea11c0

    SHA512

    d8a0ad31aaa7976abb0c3cbf631a0219fd6aa441dcb8b770d9a3d6fb8e93001a8e8f59d9b74a381cf5dc1bb146fa369f13d9eb3da9efab6f6b4c36899613f2de

  • memory/3764-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4664-0-0x00000000020C0000-0x00000000020C6000-memory.dmp

    Filesize

    24KB

  • memory/4664-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/4664-8-0x00000000020C0000-0x00000000020C6000-memory.dmp

    Filesize

    24KB