Analysis

  • max time kernel
    150s
  • max time network
    152s
  • 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, 17:41

General

  • Target

    2024-02-22_7331189f179bf45624e853f42159b67d_cryptolocker.exe

  • Size

    41KB

  • MD5

    7331189f179bf45624e853f42159b67d

  • SHA1

    bcdc054787df8f2d744fd62943a3e861f4b7e795

  • SHA256

    ac27aac6351d9d30b38cb6e0c020c8e1c59e145e0c149d2e0fc30f89c698d547

  • SHA512

    cd7e486c7451a5a3642361388a6d6d0d4ffb4e356cdcf22bf887be536cc4c72e49f1380b744872dfef238997b8f9edb3f479f64b70058c8547da8864683fc39c

  • SSDEEP

    768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAky:b/pYayGig5HjS3NPAP

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_7331189f179bf45624e853f42159b67d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_7331189f179bf45624e853f42159b67d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1152
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:1352

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          41KB

          MD5

          8dad3616d8187ad43e69dc75f097ed03

          SHA1

          7d9d3bcd9074ecd73eaf19c873a750156b82787b

          SHA256

          7cf7aa7cd7ffae8343a8673fc1e44e53f2a50f6c62456f4f1fba35e0cca3dbba

          SHA512

          543e5b762eb55298764de17ebe93516040e227437a236a504e46a8a8471574d8160afbc1ba7aabd2fbc10fd7cf9a29e2302b59e2aec5cb58c594c969c61659b2

        • memory/1152-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/1152-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/1152-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1352-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

          Filesize

          24KB