BASE64 ENCODED XFER

this method is used when the remote host may have firewall protections that prevent the attacker from downloading a file into the compromised host

root@oco:~$ base64 shell -w 0
 f0VMRgIBAQAAAAAAAAAAAAIAPgABAAAA... <SNIP> ...lIuy9iaW4vc2gAU0iJ51JXSInmDwU
 
 * the -w 0 disables line wrapping.
    - it is useful in situations where embedding the output in a single-line script
      and transmitting over network protocols that break on newlines
      
root@target:~$ echo f0VMRgIBAQAAAAAAAAAAAAIAPgABAAAA... <SNIP> ...lIuy9iaW4vc2gAU0iJ51JXSInmDwU | base64 -d > shell

#validate the file
root@target:~$ file shell
 shell: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, no section header
root@target:~$ md5sum shell
 321de1d7e7c3735838890a72c9ae7d1d shell
 
root@oco:~$ md5sum shell
 321de1d7e7c3735838890a72c9ae7d1d shell