If you’re an active Telegram user, now is the time to take security seriously. In a staggering data breach reported by Have I Been Pwned (HIBP), over 361 million email addresses tied to Telegram activity have been exposed. The leak includes credentials harvested from over 1,700 stolen files sourced from cybercriminal channels on Telegram itself.
Yes — you read that right. Telegram, the very app where this massive breach was discussed and distributed, is also the platform where many of the compromised accounts originated.
What Was in the Telegram Leak?
The Telegram leaked dataset includes:
- Email and password pairs collected via data breaches and credential stuffing attacks
- Browser-style credential logs with:
- Usernames
- Passwords
- Associated URLs
- Raw session cookies from infected devices
These credentials weren’t just randomly dumped. They were systematically distributed through Telegram channels operated by cybercriminals, who use leaked data to build credibility and attract followers in underground communities.
Why Are Telegram Accounts So Frequently Hacked?
Telegram is known for its open architecture, multi-device sync, and flexible API, which are great for productivity, but also leave security gaps if not correctly managed. Here are some of the most common attack vectors:
1. Malware-Based Session Hijacking
If you log into Telegram on a compromised Windows device (infected with a trojan or info-stealer), malware can access your session file (TData). This file enables hackers to bypass login codes and mirror your account on another machine, essentially becoming you.
No password required. No notification sent.
2. Persistent Cloud-Based Chat History
Telegram syncs your entire chat history including personal DMs, business discussions, and file transfers across all devices. Once a hacker gets in, nothing is off-limits.
Even if you delete the app or change devices, they still have access.
3. Undetected Takeovers
Hackers often quietly monitor or manipulate your account without your knowledge. They can:
- Read all your conversations
- Impersonate you in groups
- Delete messages to cover their tracks
Victims frequently don’t realize what’s happened until it’s too late.
4. Abusive Bots and API Access
Telegram’s robust API allows the creation of massive bot-driven groups. Hackers leverage this to create fake communities, manipulate victims with scripted conversations, or clone your work/finance groups to trick your contacts.
5. Weak New Device Verification
Unlike platforms such as WeChat or WhatsApp, Telegram doesn’t require multi-step friend confirmation, QR scans, or biometric verification for new logins.
If a hacker gets access to your SMS code (or bypasses it via malware), they’re in.
What Happens Once an Account is Compromised?
Once a hacker gains control of your Telegram account, the possibilities for abuse are extensive:
Group Impersonation
Hackers replicate work or investment groups using bots and your name to extract money or private information from your contacts.
Behavioral Mimicry
By studying your chat patterns, hackers can mimic your tone and language, increasing the likelihood that your friends will fall for a scam.
File-Based Malware Distribution
They may send malicious files or links disguised as documents, updates, or crypto tools. If your friend opens them, their computer becomes the next victim.
Wallet and Key Theft
Many users store sensitive data in Telegram’s cloud:
- Google 2FA backup codes
- Crypto wallet seed phrases
- Passwords to exchanges
If your account is breached, this information becomes a blueprint for full identity theft.
Financial Scams via Social Engineering
A hacker posing as you may initiate a “casual” chat with your friends or colleagues, followed by a fake emergency requiring money.
How to Protect Yourself from Telegram Leaks
It’s easy to assume you’re safe until you’re not. Here’s how to take control of your Telegram security:
1. Set a Local Passcode
In Telegram:
Settings > Privacy and Security > Local Passcode
This protects session files (TData) on your device. Without it, even malware can’t open your Telegram app.
2. Enable Two-Factor Authentication
Go to Settings > Privacy and Security > Two-Step Verification
Set a strong password separate from your Telegram login code. Even if someone steals your phone number, this step blocks access.
3. Monitor Active Sessions
Check Settings > Devices regularly.
If you see a strange IP address, an unknown location, or a device you’ve never used, terminate the session immediately.
4. Don’t Trust Financial Requests
If someone asks for money, even if it’s a friend, always verify via another channel (like a phone call or a video chat). Never rely solely on Telegram DMs.
5. Avoid Opening Unknown Files
Confirm the file purpose before downloading, especially if it’s a .exe, .zip, or .scr file.
6. Disable Group Invites from Strangers
Go to Settings > Privacy and Security > Groups & Channels, and set “Who Can Add Me” to “My Contacts.” This limits your exposure to scam groups.
7. Never Store Keys or Passwords in Telegram
Telegram is not a password vault. Do not save the password in the digital device.
8. Avoid Using Telegram on Insecure Devices
If possible, avoid logging in from shared or vulnerable Windows devices. iOS and secure Android environments are generally safer.
What To Do If You’ve Been Hacked
If your Telegram account has been compromised:
- Immediately log out of all other devices
Go to: Settings > Devices > “Terminate All Other Sessions” - Change your passwords
Not just Telegram, also for any accounts you’ve referenced or linked through the app (crypto wallets, exchanges, Google, etc.) - Notify your contacts
Let them know that your account may have been used maliciously. - Report the incident to Telegram Support
Although recovery options are limited, flagging the issue helps build a pattern of abuse. - If crypto was involved, consider a professional investigation
In cases of major financial loss, consulting with a cybercrime expert may increase your chances of fund recovery.
Final Thoughts
Telegram’s strength lies in its openness, speed, and features. But these same qualities make it a high-risk platform if not used carefully, especially for those managing sensitive assets like crypto wallets, investment groups, or business operations.
Staying secure isn’t just about enabling settings. It’s about understanding how attackers operate — and always being one step ahead.