Self-optimizing cross-platform code tracer based on dynamic recompilation
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Self-optimizing cross-platform code tracer based on dynamic recompilation, powered by Frida and Capstone. Works at the machine code level, no source code needed. Tags threads based on which APIs they use, showing you in real-time what functions have been called, allowing you to study them by carefully injecting logging and other side-effecty code.




Building for local development

Building agent.js

This is the blob of JavaScript that CryptoShark injects into target processes.

Install build-time dependencies

npm install -g gulp
npm install


gulp build


gulp lint

Watch while developing

gulp watch

Building the application

  • Install Qt 5.3.1 or newer. (For now do not use their online installer, as it's still at 5.3.0, which has some rendering bugs.) Debian users can install the following packages: qt5-qmake qt5-default libqt5qml5 libqt5quick5 libqt5quickwidgets5 qml-module-qtquick-dialogs

  • Grab the latest frida-qml binaries from here. For example: Download the entire directory and add it to your Qt installation's qml directory (on Mac it is typically: ~/Qt/5.3/clang_64/qml/). (Only Windows and Mac binaries available for now. For Linux you'll have to build Frida yourself.)

  • Open with Qt Creator, select the Release configuration and hit Run.

Building a portable Windows binary

In order to build a portable binary we will need a static build of Qt and frida-qml. This is not recommended for development due to the prolonged linking times, but it is very useful for generating a portable CryptoShark binary without any external dependencies.


  • MS Visual Studio 2013
  • Windows SDK 8.1
  • Git
  • Perl
  • Python
  • nasm

Review all the paths in tools\env.bat to make sure everything matches your system. Now, run it to enter the environment, which is required for the next steps.

Building OpenSSL

  • Download the latest openssl tarball and extract it next to the CryptoShark repo.

  • Change to that directory and run: ..\CryptoShark\tools\01-build-openssl.bat.

Building Qt

  • Get the qt5 repo: git clone git:// qt5.

  • Switch to the 5.3 branch:

cd qt5
git checkout 5.3
  • Get the source code: perl init-repository --no-webkit.

  • Change working directory to qt5\qtbase and run ..\..\CryptoShark\tools\02-build-qt.bat.

  • Change working directory to qt5\qtdeclarative and run qmake followed by nmake.

  • Change to qt5\qtquickcontrols and run qmake followed by nmake.

Building frida-qml

  • Build frida.sln for Release|Win32 as described here.

  • Edit and change win32:installPath to point to your qt5\qtbase\qml\Frida.

  • Change to frida\frida-qml and run qmake followed by nmake install.

Building CryptoShark

  • Run npm install followed by gulp build.

  • Run tools\

  • Run qmake followed by nmake.

  • A fresh new portable binary is now at: release\cryptoshark.exe.