Awesome

binjection

Injects additional machine instructions into various binary formats

Example Help

Usage of ./binjection:
  -c	Auto Code Cave Mode (true/false) (default true)
  -codeCaveMode
    	Auto Code Cave Mode (true/false) (default true)
  -d string
    	Output file (default "injected.out")
  -dstFile string
    	Output file (default "injected.out")
  -i string
    	Input file to inject into (default "a.out")
  -inFile string
    	Input file to inject into (default "a.out")
  -input string
    	Input file to inject into (default "a.out")
  -l string
    	send stdout to a log file
  -logFile string
    	send stdout to a log file
  -s string
    	Shellcode to inject (default "shell.asm")
  -shellFile string
    	Shellcode to inject (default "shell.asm")

Read more about the project here:

https://www.symbolcrash.com/2019/02/23/introducing-symbol-crash/