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Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/02/2024, 12:51

General

  • Target

    2024-02-23_a149418ee29df4dde05b41d2222699bc_cryptolocker.exe

  • Size

    39KB

  • MD5

    a149418ee29df4dde05b41d2222699bc

  • SHA1

    5b6b4a2744336b64285beae1723710a429a2dcef

  • SHA256

    228e913b3a21f68b1649e71d6e947b4596db6bd7d3dacdc224c0dfb087fe6892

  • SHA512

    c2d2b675aaa05947c37d4128dcdea6019822143e04da3b79005bb56cdd900472c05ee99a06952226154c31f81529fa45e71072c585b34fc5da31ed7a76083b55

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxujsFw5:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJ5

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 1 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\2024-02-23_a149418ee29df4dde05b41d2222699bc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-23_a149418ee29df4dde05b41d2222699bc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1780
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:4432

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    66e265f539eda4c87789f8fb8f333ca0

    SHA1

    888e961d6bd7ac92fa832bb6ab5cf6cf07c7cc87

    SHA256

    8af8cecb7ae45ff3c473b87b19ec8e6da6c9195d8f2a4dc13fb294f2e8ecf294

    SHA512

    7aeb1b626180cb5d4efdcdd56149bb73f524e99295782e1dc8c7bc673b13457293751950966501894bff5c92bf69982af248e0b334cb3b75d591a8b97f14db43

  • memory/1780-0-0x00000000022D0000-0x00000000022D6000-memory.dmp

    Filesize

    24KB

  • memory/1780-1-0x00000000022D0000-0x00000000022D6000-memory.dmp

    Filesize

    24KB

  • memory/1780-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/4432-20-0x0000000002120000-0x0000000002126000-memory.dmp

    Filesize

    24KB