The FBI has highlighted three tell-tale signs on your smart devices that could indicate they’ve been hacked.
Hackers in films might look like they’re cracking systems with rapid-fire code, but real-world compromises are often far less dramatic.
Con tricks such as phishing can be enough to obtain personal details, which are then abused for a range of criminal activity.
Many people keep a close eye on obvious targets like phones, laptops and tablets. However, everyday connected gadgets around the home can also create an easy route in for attackers.
That includes Internet of Things products such as smart TVs, connected fridges, thermostats, kids’ toys, and essentially anything that logs on to your Wi‑Fi.
The FBI wrote in a bulletin: “Cyber actors actively search for and compromise vulnerable Internet of Things (IoT) devices for use as proxies or intermediaries for Internet requests to route malicious traffic for cyber-attacks and computer network exploitation.”
Once compromised, these devices can be used as “middlemen” so it appears suspicious or illegal traffic is coming from your home network. So what should you watch for if you think a device may have been targeted?
One major clue is a sudden spike in data usage. If someone is piggybacking on your network, your household internet consumption may jump unexpectedly.
A malware-infected smart device can generate extra traffic in the background — for instance, by sending spam, taking part in coordinated attacks, or repeatedly contacting unknown servers.
This also helps criminals mask who they are and where they’re operating from, because your IP address becomes the one linked to the activity.
If a particular device’s data usage shoots up without an obvious explanation, that’s a strong sign you may need to investigate.
Of course, noticing a data surge isn’t always easy — which leads to the next indicator.
You might not track your usage day to day, but your internet provider often does. If your consumption suddenly rises, it may show up on your account.
In some cases, that can even trigger extra charges or a change in your billing.
If your provider flags unusually high usage when you haven’t changed your routines, added new services, or started downloading more than normal, it may suggest someone or something else is using your connection.
And there’s another warning sign people often experience.
When traffic volumes rise, performance can suffer. You may find your internet becomes sluggish, devices take longer to respond, or streaming and browsing start lagging.
Slow speeds can have plenty of innocent causes — weak broadband, too many connected devices, or high-demand activities like online gaming — but if the slowdown appears suddenly and doesn’t match how you’re using the internet, it could point to unwanted activity in the background.
Across all three signs, the key pattern is an abrupt change: billing increases, unexplained data spikes, or your network performance dropping without a clear reason.