TL;DR
Yes, malware can steal your Facebook c_user, xs and datr cookies. These cookies allow attackers to impersonate you, hijack your account, and potentially spread the malware further. Protect yourself by keeping your software updated, using strong passwords, being careful about what you download/click, and running reputable anti-malware software.
Understanding the Risk
Facebook uses cookies to keep you logged in and personalize your experience. The c_user cookie identifies your account, while xs and datr are used for session management and security. If malware gains access to these cookies, it can:
- Log into your Facebook account without your password.
- Post on your behalf.
- Send messages to your friends.
- Change your account settings.
- Potentially spread malware to your contacts.
How Malware Steals Cookies
Malware can steal cookies in several ways:
- Keyloggers: Record everything you type, including passwords and cookie data.
- Browser Extensions/Add-ons: Malicious extensions can access your browser’s cookies.
- Trojan Horses: Disguise themselves as legitimate software but secretly steal information.
- Information Stealers: Specifically designed to find and extract sensitive data like cookies, passwords, and credit card details.
Protecting Your Facebook Account
Here’s a step-by-step guide to protect your account:
1. Keep Your Software Updated
- Operating System: Regularly update Windows, macOS, or Linux. Updates often include security patches that fix vulnerabilities malware can exploit.
- Windows: Settings > Update & Security > Windows Update
- macOS: System Preferences > Software Update
- Web Browser: Keep Chrome, Firefox, Safari, or Edge up to date.
- Anti-malware Software: Ensure your anti-virus/anti-malware program has the latest definitions.
2. Use Strong Passwords and Two-Factor Authentication
- Strong Password: Create a unique, complex password for your Facebook account (at least 12 characters with a mix of uppercase/lowercase letters, numbers, and symbols).
- Two-Factor Authentication (2FA): Enable 2FA on Facebook. This adds an extra layer of security by requiring a code from your phone in addition to your password.
- Go to Facebook > Settings & Privacy > Security and Login, then enable ‘Use two-factor authentication’.
3. Be Careful What You Download/Click
- Downloads: Only download software from trusted sources (official websites). Avoid suspicious links or attachments in emails.
- Links: Be wary of clicking on links from unknown senders, even if they appear to be from friends. They could lead to phishing sites designed to steal your login credentials.
4. Run Anti-malware Software
Install and regularly scan with reputable anti-malware software like:
- Malwarebytes: A popular choice for detecting and removing malware.
- Bitdefender: Offers comprehensive protection against various threats.
- Windows Defender: The built-in anti-virus in Windows, which provides basic but effective protection.
Run a full system scan regularly.
5. Check Your Facebook Login Activity
- Go to Facebook > Settings & Privacy > Security and Login, then check ‘Where you’re logged in’.
- Look for any unfamiliar devices or locations. If you see something suspicious, remove the login session immediately.
6. Clear Your Browser Cookies
Regularly clearing your browser cookies can help remove potentially stolen data.
- Chrome: Settings > Privacy and security > Clear browsing data (select ‘Cookies and other site data’).
- Firefox: Options > Privacy & Security > Cookies and Site Data > Clear Data.
What to Do If You Think Your Account Has Been Compromised
- Change your password immediately.
- Enable two-factor authentication (if you haven’t already).
- Review your account activity for any unauthorized posts or changes.
- Report the incident to Facebook: Facebook > Settings & Privacy > Security and Login, then follow the instructions under ‘If You Think Your Account Was Hacked’.