What to Do After the YouHack Data Breach (7.2M Emails and Passwords)

What Happened in the YouHack Data Breach

YouHack (youhack.ru) was a Russian-language forum where people swapped hacking tools, tutorials and stolen data. In May 2013 the forum's own database was breached. The data later circulated in hacking communities and was eventually folded into much larger compilations of leaked credentials. On November 11, 2026, the breach-notification service Have I Been Pwned (HIBP) loaded the data, so anyone can now check whether their address appears in it.

The part most people miss is that only about 107,000 of the 7.2 million exposed email addresses belong to forum members. The rest come from the forum's posts, where users shared lists of other people's email addresses and passwords taken from other breaches, phishing kits and malware. If you have never heard of YouHack, that is the most likely reason you are in it: your credentials were traded there.

What Data Was Exposed

According to HIBP's analysis, the breach contains:

• Email addresses — 7.2 million unique addresses in total
• Passwords — forum members' passwords stored as MD5 hashes, mostly unsalted, plus plain-text email-and-password pairs posted on the forum
• Usernames
• IP addresses of forum members

Unsalted MD5 offers almost no protection today. Common passwords stored that way can be cracked in seconds with free tools and precomputed tables, so treat any password linked to these records as known to attackers.

1. 1

   Step 1 of 5: Check Whether You Are in the Breach

   Go to haveibeenpwned.com and enter every email address you have used, including old ones. If YouHack appears in the results, note which address it was. HIBP also lists other breaches that address appears in, which tells you which old passwords are likely circulating. For a broader view of where your details are exposed, see our guide to checking whether your information is on the dark web.

2. 2

   Step 2 of 5: Change Any Password You Have Reused

   You cannot know exactly which password was posted, so work from the assumption that every password you used with that email around or before 2013 is compromised.

   1. Start with your email account. Whoever controls your inbox can reset almost everything else.
   2. Next, change passwords on banking, payment apps, shopping sites with saved cards, and social media.
   3. Give every account a unique password. A password manager makes that practical; our roundup of the best password managers compares the options.
   4. If your password manager has a breach or reuse report, run it and fix every flagged entry.
3. 3

   Step 3 of 5: Turn On Two-Factor Authentication

   Two-factor authentication (2FA) stops a stolen password from being enough on its own. Use an authenticator app or a passkey where you can, and SMS codes only as a fallback. Prioritize email, banking and any account that can reset other accounts. Our guide to setting up two-factor authentication everywhere walks through the major services.

4. 4

   Step 4 of 5: Look for Signs of Account Takeover

   • Check your email account's recent sign-in activity and connected devices, and sign out of sessions you do not recognize.
   • Look for forwarding rules or filters you did not create. Attackers use them to hide password-reset and bank alert emails.
   • Review recent orders, payouts and saved payment methods on shopping and payment accounts.
   • If an account was taken over, follow the provider's recovery process and then change the password and 2FA settings again.

   Automated login attacks built on old leaks like this one are explained in our guide to protecting yourself from credential stuffing.

5. 5

   Step 5 of 5: Ignore Sextortion Emails That Quote an Old Password

   When a large credential list goes public, scammers mass-email the addresses on it, quote an old password as "proof," and claim they hacked your webcam. They did not. They have a line from a breach file, often more than a decade old. Do not reply and do not pay. Delete the email and make sure that password is not used anywhere. Our sextortion email guide explains how to report it.

   Shrink What Attackers Can Pair With Your Password

   A leaked email and password become far more dangerous when an attacker can look up your name, phone, home address and relatives on people-search sites. That is what turns a credential list into a targeted phishing call or a convincing account-recovery scam. Removing your profiles from data brokers takes that context away.

Protect Yourself Beyond This Breach

YouHack is one of thousands of old breaches that keep resurfacing in new compilations. You cannot pull your data back out of a leak, but you can make it far less useful. Unique passwords and 2FA close the account-takeover risk. Removing your personal details from data broker sites closes the targeting risk. If you are comparing services that do the removal for you, see our ranking of the best data removal services.

PrivacyOn removes your information from 100+ data broker and people-search sites, monitors 24/7 for re-listings, and includes dark web monitoring that alerts you when your email shows up in a new breach like this one. Plans start at $8.33/month, with family plans covering up to 5 people. Run a free scan to see where your personal data is exposed today.

Frequently Asked Questions