Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/02/2024, 21:24

General

  • Target

    2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker.exe

  • Size

    31KB

  • MD5

    10c24dcc69a62127ce58d390091a317e

  • SHA1

    77999bdef98ad0131c88956dd0d11463f45dd8ee

  • SHA256

    1306752b59ffdb15f4a3cd61c54cbc400d71207cee150dd67dd45e90987a7932

  • SHA512

    c0cab91d3c5a7d6a821ac06af3c22368581e55ef590262666435af17b56d8c27a2b1d48dadb9246d5d83a2f7c6519eb395b4ea5254f3fb1f9aa6f2f1d5051d60

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUssoYY:b/yC4GyNM01GuQMNXw2PSjWoYY

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\2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4724
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:2792

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          32KB

          MD5

          fff9f5ba0cdf87e537132c073d69645b

          SHA1

          66f598aa7ea5dd52ce8420f623b2985189d8af87

          SHA256

          2e03dea3d573a5f5cac3a14eca74a1e5bd63b6627d6753db78247318321bc7d4

          SHA512

          5bb1962fd700933871b9d0fad1d19744b395b8c2b7cb68b007da7c776d41cf84b0ff43203f3df4e8a796e3494057d56594028ab051c8ed3c241315ddb99716c1

        • memory/2792-21-0x00000000020D0000-0x00000000020D6000-memory.dmp

          Filesize

          24KB

        • memory/4724-0-0x0000000002250000-0x0000000002256000-memory.dmp

          Filesize

          24KB

        • memory/4724-1-0x0000000002250000-0x0000000002256000-memory.dmp

          Filesize

          24KB

        • memory/4724-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB