iPhone Hacking During Calls: Is it Possible?

TL;DR

Yes, an iPhone can be hacked during a phone call, but it’s rare and usually requires sophisticated methods. Most people aren’t at risk from this type of attack. Keeping your software updated is the best protection.

How iPhones Can Be Hacked During Calls

While modern iPhones are very secure, several techniques could potentially allow someone to hack your phone during a call. Here’s a breakdown:

1. Exploiting Software Vulnerabilities

1. Zero-Day Exploits: These are vulnerabilities unknown to Apple and therefore unpatched. Attackers use these to install malware remotely while you’re on a call (or even before). This is the most dangerous method, but also the hardest for attackers.
2. Outdated Software: If your iPhone’s operating system (iOS) isn’t up-to-date, it may contain known vulnerabilities that hackers can exploit.

How to protect yourself: Always update iOS as soon as a new version is available. Go to Settings > General > Software Update.

2. Advanced Call Interception Techniques

1. SS7 Vulnerabilities (Less Common Now): The Signaling System No. 7 (SS7) network is used by mobile carriers worldwide. Historically, vulnerabilities in SS7 allowed attackers to intercept calls and messages. This is becoming less common as networks are upgraded.
2. IMS Exploits: IP Multimedia Subsystem (IMS) is a newer architecture replacing SS7. Similar vulnerabilities can exist here too, though they’re complex to exploit.

How to protect yourself: You generally can’t directly protect against these. Rely on your mobile carrier to secure their network.

3. Malware Installed Before the Call

1. Pegasus Spyware (Example): This notorious spyware, developed by NSO Group, infects iPhones through phishing links or zero-day exploits. Once installed, it can monitor calls, messages, emails, and more.
2. Other Malware: Similar malware exists, though Pegasus is the most well-known example. It often requires tricking you into clicking a malicious link or downloading a compromised app.

How to protect yourself:

• Be careful about links: Don’t click on suspicious links in emails, texts, or websites.
• Download apps from the App Store only: Avoid sideloading apps (installing them outside of the official store).
• Use strong passwords and enable two-factor authentication: This makes it harder for attackers to access your account.

4. Rogue Base Stations (IMSI Catchers)

1. How they work: These fake mobile towers trick your phone into connecting to them instead of the legitimate network. They can intercept calls and messages.
2. Limited Range: IMSI catchers have a limited range, so you’d need to be physically close to one.

How to protect yourself: These are difficult to detect as an end-user. Your carrier may provide some protection.

5. Call Recording Apps (Not Hacking, But Privacy Concerns)

Some apps can record your calls without the other party’s knowledge. While not technically hacking, it’s a privacy issue.

How to protect yourself: Be aware of any call recording apps you install and check their permissions carefully.

Checking for Suspicious Activity

1. Unusual Battery Drain: Malware can consume significant battery power.
2. Increased Data Usage: Spyware sends data back to the attacker, increasing your data usage. Check Settings > Cellular.
3. Strange Noises During Calls: Although rare, you might hear faint clicking or static sounds during a call if it’s being intercepted.

What to Do If You Suspect Your iPhone Has Been Hacked

1. Update iOS immediately: Ensure you have the latest security patches.
2. Erase All Content and Settings: This is the most effective way to remove malware, but it will delete all your data. Back up your phone before doing this (but be aware that the backup might also contain malware). Go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings.
3. Contact Apple Support: They can provide further assistance and guidance.