Security
How to know if you have been hacked – 12 signs
Anthon Wansland
CMO & Founder
6 min
read
How do I know if I have been hacked? If something feels off, knowing the warning signs can help you act quickly, lock hackers and scammers out, and limit the damage before it spreads. Keep reading to spot the warning signs you’ve been hacked.
What Are The First Signs of Being Hacked?
Unusual device behavior, unexpected account lockouts, password reset emails you didn’t request and unknown financial transactions can all be first signs that you’ve been hacked.
Hackers may gain access by tricking you into downloading malicious software to your computer, iPhone or other devices. In other cases, your information may have been exposed through a data breach or cyberattack against a service you use.
How to Know If You Have Been Hacked – 12 Common Signs
Attackers can reach your devices and accounts through many vectors – phishing emails and texts, fake tech support, unsecured public Wi-Fi, and automated attacks that cycle through stolen credentials at scale.
So, what happens when you get hacked? What you notice depends on the type of attack, what the attacker is after, and how well protected you are. These are the most common warning signs.
You can't access your accounts, or something looks off
Sudden changes to your accounts, or losing access entirely, are clear signals. Watch for:
Unexpected logouts from social media, email, or banking
Passwords that no longer work
Emails or texts about login attempts, password resets, or 2FA codes you didn't trigger
Changes to your settings, backup contact details, or security questions
2.Unusual activity in your email or messaging apps
Once inside your account, attackers use it to reach your contacts by spreading malware or running scams in your name.
Signs to watch for:
Sent messages you don't recognize
A sudden spike in spam, especially threats or extortion attempts
Friends or colleagues telling you they've received strange messages from you
Attackers may also create inbox rules that silently hide or redirect emails, making the intrusion harder to spot.
You're notified that your data was part of a breach
Take breach alerts seriously. They don't always mean you've been compromised, but they do mean your risk is elevated. Update any exposed passwords immediately and keep a closer eye on affected accounts. A good password manager can flag credentials that have appeared in known leaks.
4.Your device starts behaving differently
Malware affects performance in ways that are easy to overlook at first. Pay attention if:
Your device is slower, crashes more often, overheats, or drains battery faster than usual
Unfamiliar browser extensions or toolbars appear
Apps launch on their own without you opening them
Someone else appears to be in control
Some malware, or tools, gives attackers remote access to your device. From there, they can browse your files, read your emails, and move money.
If your cursor moves without you touching it, or your webcam light turns on when you're not using it, treat that as a serious red flag.
Money is missing or moving without your knowledge
Financial accounts, especially crypto, are high-value targets. Look out for:
Unfamiliar charges on your bank or credit card
Missing funds from a cryptocurrency wallet
Unexpected inquiries or new accounts appearing on your credit report
Someone is impersonating you
Attackers can use your stolen information to scam your professional contacts or take on your identity entirely. For example applying for jobs, loans, or insurance in your name. If someone mentions a strange interaction they've had with "you" on a platform you don't use, look into it immediately.
A ransomware notice appears
Ransomware locks you out of your system and encrypts your files until you pay. It's no longer limited to large organizations, individuals and mobile users are targeted too.
Be cautious with any app requesting access to Accessibility Services. A pop-up demanding payment to restore your files means your device is likely already infected.
Your security software has been disabled
Sophisticated attackers try to turn off your defenses before they move further into your system. If your antivirus has been switched off without your input, assume something is wrong. Keep your security software active and up to date.
10. Pop-ups and redirects you didn't ask for
Adware hijacks your browsing, triggering pop-ups, sending you to unwanted sites, or quietly changing your default search engine. A sudden flood of ads, unexpected redirects, or new tabs opening on their own are all signs your browser has been compromised.
Identity theft beyond your devices
Stolen data often ends up sold on the dark web. That can mean someone opens accounts, takes out loans, or fields debt collectors, all in your name. Unexplained credit inquiries or unfamiliar accounts on your credit report are signals you can't afford to ignore.
Activity on your social media you didn't create
Social accounts are valuable to attackers looking to gather personal data or run scams. Review your activity regularly. By that we mean posts, messages, and friend requests you don't recognize are all warning signs. Check your list of logged-in devices too, and treat anything unfamiliar as a potential breach.
What to Do If You Get Hacked: 10 Tips
If you've been hacked, it’s time to act. At the first sign of a compromise, act fast.
Disconnect from the internet. A hacked device can spread the infection to others on the same network. Cut the connection immediately – disable Wi-Fi on each device to prevent it from reconnecting automatically.
Freeze your credit. If your financial information is at risk, place a credit freeze with all three major credit bureaus — Experian, Equifax, and TransUnion. This stops attackers from opening new accounts or taking out loans in your name.
Scan for malware and remove unfamiliar apps. Malware can give attackers a backdoor into your accounts even after you've changed your passwords. Run a full antivirus scan, and delete any app you don't recognize or didn't intentionally install.
Recover compromised accounts. Most platforms have a dedicated account recovery process. Search for "how to recover a hacked [service name] account" and follow the steps directly from the platform.
Update your passwords. Change passwords on all affected accounts — and any others that share the same credentials. Use strong, unique passwords combining uppercase and lowercase letters, numbers, and symbols. Store them in a secure password manager.
Enable two-factor authentication. Even if your password is exposed, 2FA adds a layer that's much harder to bypass. Turn it on for every important account — especially email, banking, and social media. Use an authenticator app rather than SMS for stronger protection.
Alert your contacts. Attackers use compromised accounts to spread scams and malware to the people you know. Let your contacts know what happened and tell them not to open any unexpected messages, links, or attachments coming from your accounts.
Review your other accounts. A breach rarely stops at one account. Check activity logs across all platforms for unfamiliar logins or devices. Prioritize financial accounts, email, and social media — and lock down anything that looks suspicious.
Update your operating system and apps. Outdated software is an open door. Make sure all your devices are running the latest versions of their operating systems and applications to close known vulnerabilities.
Factory reset as a last resort. If malware persists after scanning, a factory reset is the most reliable way to eliminate it. Wiping your device and reinstalling the operating system removes even deeply embedded threats.
How To Protect Yourself From Being Hacked
While you can be hacked by no fault of your own, there are still precautionary measures you can take to protect yourself against hackers. At a bare minimum, the less personal information that’s available about you online, the harder it will be for hackers to target you.
Here are five ways to protect your privacy online and prevent yourself from being hacked:
Use an email alias. When signing up for new accounts or filling out surveys or applications, you can use a secondary email account that routes to your primary inbox. This option protects your primary address — and avoids risking the security of any linked accounts and information.
Enter fake information when signing up for online services. You should never enter false information for anything official, like your taxes or police reports. However, you can be more guarded with your sensitive data on retail sites, surveys, apps, and email newsletters. If any of these companies suffer a data breach, hackers won’t be able to target you as easily if your profile has an incorrect date of birth or old phone number.
Tighten your privacy settings on social media. Ideally, only trusted friends and family should be able to view your profile. Without open visibility of your location tracking, photos, and content, hackers won’t be able to glean information from your profile to target you with phishing scams.
Remove your personal data from Google searches and data broker sites. Data brokers collect and sell your personal information, which can be exploited by hackers. Opt out of these services by contacting major data brokers directly or by using a data removal service.
Beware of shoulder surfing. Pay close attention to your surroundings when logging in to sensitive accounts or unlocking your phone — as hackers can watch you enter your phone’s PIN, online banking password, and even your credit card number. Whenever possible, use biometric authentication options such as Face ID or fingerprint sensors to secure your devices.
It’s much easier and safer to take a proactive approach to digital security by downloading a dedicated cybersecurity platform.
Also read: How to Protect Your Digital Footprint – 10 easy ways
