Your messaging app account is one of the most valuable targets for hackers. It contains your private conversations, personal photos, contact lists, and often links to your financial and social accounts. A compromised messaging account can lead to identity theft, blackmail, financial fraud, and devastating social engineering attacks on your contacts.

In 2025 alone, messaging account compromises increased 67% globally. WhatsApp account theft affected over 20 million users, and Telegram saw a surge in session hijacking attacks. This guide explains exactly how these attacks work and provides actionable steps to make your accounts virtually unhackable.

How Hackers Target Messaging Accounts

1. SIM Swap Attacks

How it works: The attacker convinces your mobile carrier to transfer your phone number to a new SIM card they control. Once they have your number, they receive your SMS verification codes and can take over any account that relies on phone-number verification — including WhatsApp, Telegram, and Signal.

Why it's dangerous: SIM swaps bypass two-factor authentication based on SMS. The victim often doesn't realise what's happened until they lose mobile service, by which time the attacker has already accessed their accounts.

Scale: The FBI reported over 68,000 SIM swap complaints in 2025, with losses exceeding $1.6 billion. The actual number is likely much higher, as many cases go unreported.

2. Phishing & Social Engineering

How it works: You receive a message — often appearing to come from a friend, a company, or the messaging app itself — containing a link that leads to a fake login page. When you enter your credentials, they go straight to the attacker.

Modern phishing has become incredibly sophisticated. Attackers use AI to craft perfect messages in your language, clone login pages pixel-for-pixel, and even use real-time relay techniques that capture your two-factor codes as you enter them.

3. Session Hijacking (WhatsApp Web / Telegram Web)

How it works: If someone gains physical access to your unlocked phone for 30 seconds, they can link their browser to your WhatsApp Web or Telegram Web session. They then have full access to your messages from their own device without your knowledge.

This is particularly common in shared living situations, workplaces, and even intimate partner surveillance — which is disturbingly common.

4. Malware & Spyware

How it works: Malicious apps — often disguised as utilities, games, or even WhatsApp mods like GB WhatsApp — install spyware that captures your keystrokes, screenshots, or directly reads your message database.

The Pegasus spyware scandal demonstrated that even zero-click attacks (requiring no user interaction) can compromise messaging apps on fully updated devices. While Pegasus targeted high-profile individuals, commodity spyware affects millions of ordinary users.

5. Cloud Backup Exploitation

How it works: WhatsApp backups stored in Google Drive or iCloud are not end-to-end encrypted by default (WhatsApp added optional E2EE backups in 2021, but most users haven't enabled them). Hackers who compromise your cloud account can download and read your entire message history.

10 Steps to Secure Your Messaging Accounts

Step 1: Enable Two-Factor Authentication (2FA) Everywhere

This is non-negotiable. Every messaging app offers 2FA — enable it immediately:

WhatsApp: Settings, Account, Two-step verification, Enable
Telegram: Settings, Privacy and Security, Two-step Verification
Signal: Settings, Account, Registration Lock
PigeonChat: Email-based authentication with strong password requirements

Critical: Use an authenticator app (Google Authenticator, Authy) rather than SMS-based 2FA wherever possible. SMS can be intercepted via SIM swap attacks.

Step 2: Use a Unique, Strong Password

For apps that support passwords (Telegram, PigeonChat), use a unique password of at least 16 characters. Never reuse passwords across services. Use a password manager like Bitwarden, 1Password, or KeePass.

Step 3: Check Active Sessions Regularly

Both WhatsApp and Telegram allow you to see all active sessions (devices connected to your account). Check this monthly and terminate any sessions you don't recognise:

WhatsApp: Settings, Linked Devices — log out of any unknown devices
Telegram: Settings, Devices — terminate suspicious sessions

Step 4: Protect Your SIM

Set a SIM PIN (most carriers allow this through phone settings)
Contact your carrier and add a transfer PIN or account security question
Consider using an eSIM, which is harder to swap
Better yet: use messaging apps like PigeonChat that don't require a phone number at all

Step 5: Don't Use WhatsApp Mods

GB WhatsApp, FM WhatsApp, WhatsApp Plus, and YO WhatsApp are security nightmares. They're distributed through unofficial channels with no security review. Many contain spyware. All of them risk your account being permanently banned. If you want features WhatsApp doesn't offer, switch to a legitimate alternative like PigeonChat.

Step 6: Enable Encrypted Backups

If you use WhatsApp, enable end-to-end encrypted backups (Settings, Chats, Chat Backup, End-to-end Encrypted Backup). Without this, your entire chat history is readable by anyone who accesses your Google Drive or iCloud.

Step 7: Be Skeptical of Links and Verification Codes

No legitimate company will ever ask you to share a verification code via message. If someone — even a friend — sends you a code and asks you to forward it, their account has been compromised and the attacker is trying to take over yours.

Step 8: Lock Your Apps

Enable biometric or PIN lock within your messaging apps. This prevents session hijacking if someone gets physical access to your device:

WhatsApp: Settings, Privacy, Fingerprint Lock
Telegram: Settings, Privacy, Passcode Lock
Signal: Settings, Privacy, Screen Lock

Step 9: Keep Everything Updated

Security patches close vulnerabilities that hackers exploit. Update your messaging apps, your operating system, and your browser regularly. Enable auto-updates where possible.

Step 10: Choose Apps That Minimise Attack Surface

The fewer data points an app collects, the fewer things an attacker can exploit. Phone-number-based registration is inherently vulnerable to SIM swaps. Apps like PigeonChat that use email-only registration eliminate this entire attack vector.

What to Do If You're Hacked

Act immediately. Every minute matters.
Contact your carrier if you suspect a SIM swap — lock the account.
Log out of all sessions from a trusted device.
Change your password and enable 2FA if you haven't.
Warn your contacts — the attacker may impersonate you to scam your friends.
Report to the platform — WhatsApp, Telegram, and Signal all have account recovery processes.
Check your other accounts — if one account is compromised, others may be targeted next.
File a report with local authorities and your country's cybercrime unit.

The Security Advantage of Email-Based Messaging

Phone numbers are inherently insecure identifiers. They can be ported, spoofed, and intercepted. The entire SIM swap attack category disappears when you use a messaging app that doesn't require a phone number.

PigeonChat uses email-only registration — a fundamentally more secure approach. Combined with strong passwords and no metadata collection, it eliminates several of the most common attack vectors in messaging security.

Your conversations are worth protecting. Get PigeonChat →