Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-01-2024 23:28

General

  • Target

    2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe

  • Size

    60KB

  • MD5

    e1d3a3abf860b2c8e04d5c2c0b1a6bce

  • SHA1

    fbfcb12f74d444988b21a7d2d4154cc801c31171

  • SHA256

    60e6dcacb733d6735568dbb537f934e8e719facbdd870ac835c624d3a4a10576

  • SHA512

    d30ab92fd5c4a26bfa33794b8580427d61385601c837f513ba316496149ee9286eb8a9a0031cfeee50b1abd6439ef77239415a743cc9b518860cb1d3eb5a3d84

  • SSDEEP

    1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsU:BbdDmjr+OtEvwDpjM8c

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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\2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2236

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    60KB

    MD5

    09677d30740b74e04dada5a4d2462156

    SHA1

    942fedce47019ca3757a1830ecf44d989b39795b

    SHA256

    40d95227bda13d8c3f039932da2d4bcd6a818c8ccd38c3f1f1c4551d47026350

    SHA512

    d9a270148c9e87dd429dc19af86b006a70dc655b264f9f9bd608f28acbdafbd49616cea706975b1941110ee33f888983897bb25325fedc112e06e307fe1415d7

  • memory/2236-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2236-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2236-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2680-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2680-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2680-3-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/2680-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2680-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB