A Simple Guide to Chrome Extension Syncjacking Attacks
A Simple Guide to Chrome Extension Syncjacking Attacks
What Is a Syncjacking Attack?
A “syncjacking” attack is a way hackers can take control of your Google Chrome browser—often by tricking you into installing a harmful browser extension. Once installed, it can eventually allow an attacker to steal your data, disable security protections, and even take over your entire device.
1. How Attackers Set Things Up
-
Register a Domain & Create a Google Workspace Account
- The attacker gets a domain name (like
example.com
) and sets up Google Workspace on it. - They turn off two-factor authentication (2FA) so it’s easier for them to gain control later.
- The attacker gets a domain name (like
-
Create & Publish a Fake Extension
- A web browser extension is made to look harmless.
- The attacker uploads it to the Chrome Web Store.
-
Trick the Victim into Installing the Extension
- Hackers use phishing emails or other deceptive methods to send the extension link to their targets.
- Because the extension only asks for “normal” permissions, most people assume it’s safe and install it.
2. How the Attack Unfolds
-
Stealing the Profile
- After some time, the extension secretly connects to the attacker’s domain and grabs the victim’s Chrome credentials.
- This lets the attacker log the victim into an account they (the attacker) control.
-
Disabling Security Measures
- Once the victim’s browser is linked to the attacker’s managed account, the attacker can switch off or weaken security settings.
- This makes it even easier for the hacker to gain deeper control.
-
Convincing the Victim to Sync
- The attacker opens Chrome’s real support page about “sync” inside the browser.
- They use the malicious extension to change the text on that page, tricking the victim into turning on sync.
- When the victim does this, all their Chrome data (passwords, bookmarks, browsing history) is sent to the attacker’s account.
-
Taking Over the Browser and Device
- By making the victim’s browser a “managed” browser, the hacker can control it remotely.
- Eventually, they can use these privileges to take control of the entire computer.
3. Why This Attack Is Dangerous
- Minimal Effort Required: Hackers don’t need advanced social engineering; a small amount of trickery is enough to get the extension installed.
- Hard to Detect: Normal security scans can miss these extensions because they only request low-level permissions and run within the browser.
4. How to Protect Yourself
-
Keep an Eye on Browser Extensions
- Only install extensions from trusted sources.
- Regularly check your extensions list to remove anything you don’t recognize.
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Use Security Tools That Understand Browser Behavior
- SquareX, which reported this attack, recommends using a security solution that monitors how each extension behaves in real-time.
- Such tools can spot malicious actions, even if the extension itself looks innocent at first.
-
Stay Updated
- Make sure your operating system, browser, and antivirus software are all up to date.
- These updates often include fixes for newly discovered security flaws.
-
Watch for Official Guidance
- Google may release more information or patches to prevent these attacks. Keep an eye on official updates or statements.
In Summary:
Chrome extension syncjacking is a sneaky way attackers can trick you into installing a bad extension that eventually grants them access to all your browsing data—and more. Being cautious about what you install, staying informed, and using the right security tools are the best ways to avoid becoming a victim.