1.- Spot the Vulnerable System:
Reckon you can find a system with a known or potential RCE vulnerability.
You could use:
--- "Passive Reconnaissance":
This can include researching the publicly available info, domain name system (DNS) details, WHOIS records, and the nitty-gritty of the network infrastructure.
Or maybe you've got a bit of a sticky beak and can get your hands on the system.
--- "Active Reconnaissance":
Interact with the target system to gather more specific info. Techniques might include network scanning (using tools like Nmap), banner grabbing, and poking around for open ports and services.
--- "Scanning and Enumeration":
You can use scanning tools to spot the live hosts, open ports, and services running on the target network. Tools like Nmap can give you a fair bit of insight into the target's network setup and potential entry points.
--- "Vulnerability Assessment":
Use vulnerability scanning tools (e.g., Nessus, OpenVAS) to find the known vulnerabilities in the target system. These tools can automatically analyze the target and give you a list of potential weaknesses, including missing security patches and dodgy configurations.
--- "Exploit Research":
Look into the known vulnerabilities related to the target system's software, operating system, and services. Use public databases like the NVD or the CVE system.
--- "Social Engineering":
Use social engineering techniques to gather info. This could involve manipulating people within the target organization to spill the beans or exploiting human behavior to get unauthorized access.
Create a ripper report documenting the identified vulnerabilities, potential entry points, and any other info you gathered during the reconnaissance phase. This report is the foundation for further analysis and penetration testing.
2.- Get the lowdown on the target system:
Find out the operating system version, software versions, network configuration, and all that jazz.
3.- Cook up an Exploitative Payload:
Develop a specially crafted payload that can trigger the RCE vulnerability. This could involve creating dodgy input, exploiting software flaws, or mucking around with network communications. There's plenty of stuff on the internet and GitHub.
The language used to craft the payload or input that exploits that can vary depending on the nature of the vulnerability and the target system, Commonly, people use Python, PowerShell, or Bash, to create malicious scripts or commands.
Python script example:
Code: Select all
# Example Python script to exploit the vulnerability
import socket
# Craft and send a malicious payload
payload = b'\x41' * 1000 # Example payload
target_ip = '192.168.1.100' # Example ip
target_port = 12345 #Example port
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect((target_ip, target_port))
s.sendall(payload)4.- Deliver the Payload:
Deliver the crafted payload to the target system. This could be done through various means, such as sending a malicious file, injecting code through network protocols, or exploiting vulnerabilities in web applications:
--- Network Exploitation: Exploit vulnerabilities in network services, such as file-sharing protocols or network printers, to deliver the payload to the target system.
--- Physical Media: Deliver the payload through physical media like USB drives, CDs, or other removable storage devices.
--- Web-Based Exploitation: Host the malicious payload on a website and trick users into visiting the site, triggering the payload execution through vulnerabilities in their web browsers.
--- Email Attachments: Attach the malicious payload to an email and send it to targeted individuals within the organization. Social engineering techniques may be used to convince recipients to open the attachment.
5.- Injecting code through network protocols:
Use specially crafted network requests or messages that exploit vulnerabilities in the target system's implementation of the SMB protocol. This could involve sending malformed packets or exploiting buffer overflow vulnerabilities.
Exploiting vulnerabilities in web applications, uses a tool like Impacket to send a malicious SMB request to a target system.
6.- Evasion:
Use obfuscation techniques to disguise the malicious payload, making it harder for security systems to detect. This may involve encryption, encoding, or other methods to bypass security mechanisms.