reverse-shell | Reverse Shell as a Service | Security Testing library
kandi X-RAY | reverse-shell Summary
kandi X-RAY | reverse-shell Summary
On the target machine, pipe the output of into sh. Go back to your machine, you should now have a shell prompt.
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QUESTION
I am rewriting a simple reverse-shell program I made in python, now in C.
The program is supposed to be trying to connect to a host(netcat listening on the specified port) and then take the output from nc, sent over a tcp socket, and make a system call using popen() and then send back the terminal output via the socket connection to nc where it is displayed.
When I try sending commands the program returns what I requested, but also some giberish.
Ex.:
/Users/jacob/Library/Developer/Xcode/DerivedData/backdoorfbhufkccmceisqaozrfitkmfsvge/Build/Products/Debu@Ԓ`? ??????0d?r?
(Output from nc in terminal, this was a 'pwd' command)
I also seem to have some kind of problem where a buffer isn't cleared? When I use the 'say' command(say [sentence] ) MacOS is supposed to use voice the sentence. This happens, but only the 2 first letters of the argument after 'say'(the 2 first characters of the sentence) and then says an earlier string. ('Successfully connected!')
Ex.: (command: 'say hello')
heSuccessfully connected!
I have tried to open the FILE stream in different places and
Code (after socket setup and connection):
...ANSWER
Answered 2020-Aug-19 at 21:01I think your main issue is here:
QUESTION
OpenBSD's Netcat implementation listens on a port with unix_bind()
... basically the same behavior as Rust's TcpListener::bind()
. Where I got lost in writing my listen
function (emulating nc -l -p
) is how to interact with reverse shells.
As seemingly trivial as it sounds, I want listen
to give me the sh-3.2$
prompt like nc -l -p
does. All the Netcat-Rust implementations I dug up online don't allow me to interact with reverse shells like that.
Reverse shell code (Machine 1): (adapted from this question I asked years ago)
...ANSWER
Answered 2020-Apr-23 at 05:48Basically, we want to have two bi-directional redirections - one from stdin
to the stream
, and the other from stream
to stdout
.
We can accomplish this using the generic pipe_thread
function below, which creates a dedicated OS thread for this (can be done more efficiently, but we want simplicity). In listen
, we spawn two threads like this, and wait for them to terminate.
QUESTION
I tried today to understand as much as I could a command (found here) to open a reverse shell on the victim side. Here is it:
...ANSWER
Answered 2019-Aug-02 at 08:44A file descriptor in
bash
is a number, i. e. one or more digits, so/dev/…
is definitely not a file descriptor. You were mislead by the special construct>&
, which unless followed by a number is not the redirection operator for duplicating an output file descriptor, but the unpreferred format for redirecting standard output and standard error.Why the author used
0>&1
to change stdin instead of<&1
, only he (or someone who can read his mind) can tell; I agree with you that it makes more sense to use the<
redirection. Both versions work because&1
refers to/dev/tcp/ip/port
, which can be read from as well as written to.The behavior is not strange at all, since, as you already wrote, the prompt is printed on stderr.
Well, redirecting stderr is done on the first command by
>&
.
QUESTION
I'm making a simple Python 2.7 reverse-shell , for the directory change function everytime I type cd C:\ in my netcat server it throws this error "WindowsError: [Error 123] The filename, directory name, or volume label syntax is incorrect: 'C:\\n'" Here is my code.
...ANSWER
Answered 2018-Dec-22 at 02:35When you use data = s.recv(1024)
to receive data from remote, the \n
character, generated when you press Enter to end current input, will be received at the same time.
So you just need to .strip()
it, or use [:-1]
to remove the last character (which is \n
), when you get data.
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