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Functrace - A Function Tracer

| Post sponsored by FaradaySEC | Multiuser Pentest Environment

functrace is a tool that helps to analyze a binary file with dynamic instrumentation using DynamoRIO (http://dynamorio.org/).
These are some implemented features (based on DynamoRIO):
  • disassemble all the executed code
  • disassemble a specific function (dump if these are addresses)
  • get arguments of a specific function (dump if these are addresses)
  • get return value of a specific function (dump if this is an address)
  • monitors application signals
  • generate a report file
  • ghidra(https://ghidra-sre.org/) coverage script (based on the functrace report file)

Setup
$ wget https://github.com/DynamoRIO/dynamorio/releases/download/release_7_0_0_rc1/DynamoRIO-Linux-7.0.0-RC1.tar.gz
$ tar xvzf DynamoRIO-Linux-7.0.0-RC1.tar.gz
OR
$ wget https://github.com/DynamoRIO/dynamorio/releases/download/cronbuild-7.91.18047/DynamoRIO-x86_64-Linux-7.91.18047-0.tar.gz
$ tar xvzf DynamoRIO-x86_64-Linux-7.91.18047-0.tar.gz
You can also clone and compile directly DynamoRIO
$ git clone https://github.com/invictus1306/functrace
$ mkdir -p functrace/build
$ cd functrace/build
$ cmake .. -DDynamoRIO_DIR=/full_DR_path/cmake/
$ make -j4

Using functrace
$ drrun -c libfunctrace.so -report_file report -- target_program [args]

Options
The following [functrace](https://github.com/invictus1306/functrace) options are supported:
-disassembly                    -> disassemble all the functions 
-disas_func function_name       -> disassemble only the function function_name 
-wrap_function function_name    -> wrap the function function_name    
-wrap_function_args num_args    -> number of arguments of the wrapped function
-cbr                            -> remove the bb from the cache (in case of conditional jump)
-report_file file_name          -> report file name (required)
-verbose                        -> verbose

Simple usage

Option -verbose
$ drrun -c libfunctrace.so -report_file report -verbose -- target_program [args]

Option -disassemby
$ drrun -c libfunctrace.so -report_file report -disassembly -- target_program [args]

Option -disas_func
$ drrun -c libfunctrace.so -report_file report -disas_func name_function -- target_program [args]

Option -wrap_function and -wrap_function_args
$ drrun -c libfunctrace.so -report_file report -wrap_function name_function -wrap_function_args num_args -- target_program [args]

Option -cbr
$ drrun -c libfunctrace.so -report_file report -cbr -- target_program [args]

CVE-2018-4013 - Vulnerability Analysis
A vulnerability on the LIVE555 RTSP server library. This is the description.


Working enviroment
Tested on Ubuntu 16.04.5 LTS 64 bit

Future features
  • Ghidra plugin
  • Visual setup interface
  • Store and compare different coverage analysis
  • Run DR directy from ghidra
  • Add more functionality to functrace
  • Support for Android


Functrace - A Function Tracer Functrace - A Function Tracer Reviewed by Zion3R on 8:00 AM Rating: 5