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
    23/02/2024, 11:02

General

  • Target

    2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe

  • Size

    35KB

  • MD5

    c9dd1680b1b34fc5d1fb66bddfd3548b

  • SHA1

    f0fc1c0d97cb4cc5fd49b9cb62ffc21392441090

  • SHA256

    394d1f64fce15b2667c21ea8e5997126e1128b71ee753583e86df80312e6f5ca

  • SHA512

    c3342635248eaf12902fc939098212052a3dd27f01cb78ccb9b92085cba9b0230d897067bd6248687c49a3f6022d3a6071b693ae9f1cea03feb7d7146c9c3a58

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYuAZF:b/yC4GyNM01GuQMNXw2PSj1POaZF

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_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:3988

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          35KB

          MD5

          1cbec3a9763e1651814a1494cea4f718

          SHA1

          81792cdb9cbadee4d279459415e7976559be8e88

          SHA256

          409df8a3fbc1ab13d5829bee234f0d24f662772c5dec3258fbfcef56c4bb4a3e

          SHA512

          ac77438646ee735163210c7179892a8396c415465bb5065f9550fc5ae7077eee02402315962df1cf5403b0ea2f06368e936878e4b2880b4243801dad2cfa6546

        • memory/2188-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/2188-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/2188-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3988-20-0x0000000002120000-0x0000000002126000-memory.dmp

          Filesize

          24KB