TL;DR

What it is

When someone says "I've been hacked," they almost always mean one of these things:

  1. An attacker has signed into one of your accounts — most commonly email, social media, a shopping account, or a streaming account. They got your password from a phishing site, from a leaked database, from someone who watched you type it, or from reusing a password across sites.
  2. An attacker has hijacked a session — they didn't get your password, but they got the cookie or token that proves you were already signed in (often through a malicious browser extension or a compromised website).
  3. A device is infected — software has been installed that records what you type or steals what's on screen. Less common than people think, but real.
  4. A SIM-swap — the attacker has convinced your phone carrier to move your phone number to their SIM card. Now they receive your text-message verification codes. Less common, more dangerous, mostly used on people with significant cryptocurrency or high-profile accounts.

The early signs are similar in all four cases:

What to do — the first ten minutes

Work through this list in order. Don't skip ahead, even if a step feels obvious. From a second device (a different phone, a tablet, a partner's laptop) if you can. If you can't, use the device you have — speed matters more than perfection.

  1. Identify the affected account. If you're not sure which one — start with email. Email is the master key; almost every other account can be reset from it.
  2. Sign out of every session on the affected account. Almost every major platform has a "log me out of all devices / sessions" button in security settings. Press it. This kicks the attacker off, at least for a moment.
  3. Change the password. Use a strong, unique password — at least 14 characters, not used on any other site. A password manager makes this trivial; if you don't have one, write the new password on paper and store it somewhere safe for the day.
  4. Turn on two-factor authentication. Use an authenticator app (Google Authenticator, Microsoft Authenticator, Authy, Aegis on Android) rather than SMS where possible. SMS 2FA is better than nothing, but it can be defeated by a SIM-swap.
  5. Check and remove "trusted devices" and "app passwords." The attacker may have authorised a device or generated an app-specific password to keep access even after you change your main password. Remove anything you don't recognise.
  6. Check the recovery email and recovery phone number. Attackers often change these so they can reset the account back to themselves. Restore them to your own contact details.
  7. Check inbox forwarding rules and filters (for email accounts). One of the most common tricks: attacker sets a hidden rule that forwards a copy of every incoming email to themselves, so they can intercept future password resets. Open the filter/rule list and delete anything you didn't create.
  8. Now do the same for your email account — if the compromised account wasn't already email. Email is the master key. If the attacker got into your shopping account, they probably also tried email.
  9. Tell people. A short message — sent via a different channel like WhatsApp or text — to friends, family, and colleagues: "My account was compromised. If you got a strange message from me in the last day, ignore it." This stops the second wave of phishing the attacker is sending to your contacts.

What to do — the next 24 hours

The fire is out. Now check what the attacker may have done while inside.

What to do — the following two weeks

What NOT to do

Use AI to help you

Two prompts you can copy. Paste your situation in the brackets. Don't paste passwords or two-factor codes. Do paste the headers of any suspicious emails or screenshots of suspicious activity (with personal details masked).

Triage prompt:

"I think one of my accounts has been compromised. Here's what I noticed: [describe the signs]. The affected account is [type — email, social, shopping, etc.]. I am writing from [device type — my phone / a friend's laptop / etc.]. Please give me a step-by-step recovery plan for the next 30 minutes, in priority order, written as a numbered checklist I can follow without prior security knowledge."

Forensics prompt (after the fire is out):

"I have now secured my account: changed the password, turned on two-factor authentication, signed out other sessions, and removed unfamiliar devices. Please help me identify (a) the most likely how the attacker got in, based on what I describe, (b) what other accounts of mine are now at higher risk, and (c) what I should monitor for the next two weeks. Context: [what type of account, what you noticed, anything strange in your sent items or filters]."

A reminder: AI is a sharp thinking partner for triage and follow-up. It cannot, however, talk to your bank for you or recover access to an account you've been fully locked out of. Use it to plan and then use the official recovery channels.

Who to call

The order: the platform, your bank if money is involved, your country's cybercrime or anti-fraud authority.

Then your national reporting body.

Find the latest contacts for your country with AI:

"I'm in [your country]. List the official channels I should contact if one of my accounts has been compromised — the national cybercrime reporting body, the financial fraud / banking ombudsman, the telecom regulator (for SIM-swap), and the data-protection authority. For each, give the official website and public phone number, and tell me which to call first depending on whether (a) an email or social account was taken over but no money has moved, (b) money has moved or cards are being charged, (c) I suspect a SIM-swap, or (d) personal data has been exposed alongside the account. Cite the official source page for each. Flag anything that might be outdated."

A short curated list (for the very latest, prefer the AI prompt above):

When to escalate beyond chat

Related topics


Sources & references (internal — not rendered to the live page):