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Not only can your smartphone be hacked, it can be done very easily without your knowledge. Even if a malicious attacker cannot get into your phone, they can try to get the sensitive data stored inside, including contacts, places visited and e-mails.
Recently seen from leaked CIA documents, no one is immune to hacking attacks. Here’s how to protect yourself against them, whether they come from opportunist thieves or state-sponsored spies.
But how can you tell if your smartphone has been compromised? Below are some symptoms to look out for.
- Your smartphone gets slower than before: Impacting the performance can be because of the malware running in the background and it slower the network connection. That updates to a device’s operating system can sometimes also cause a device to suffer from decreased performance. In the same way if you fill up the memory on your device or install many processor and bandwidth intensive apps, performance can also degrade.
- Receiving strange text messages: If your friends or colleagues report receiving messages that you didn’t send, something might be suspicious (this is true for emails as well). Likewise, if you see strange text messages coming in, they may be in a trap.
- Apps in your device which you do not intend to install: Applications add functionality to smartphone, but also increase the risk of a data breach, especially if they are downloaded from websites or messages, instead of an app store. Hidden inside applications, even ones that work, could be malicious code that lets hackers steal data. While your device manufacturer or service provider may legitimately install apps from time to time due to updates, if new apps are suddenly appearing you want to be sure they are kosher. Do a Google search on the apps and see what reliable tech sites say about them.
- Device battery is draining out quickly: If your battery is dying faster than in the past, see whether apps are using too much battery. If you get a notification that an app is running in the background, that app is using battery. You can force stop or uninstall problem apps.
- Device gets hotter than before: malicious apps use your phone and degrade its performance. It may run physically hotter than before.
- Regularly used websites seems unusual: this is because of the installation of malware that is proxying on your device. It will sit between your browser and the internet and relaying the communications between them (while reading all of the contents of the communications and, perhaps, inserting various instructions of its own)–it might affect how some sites display.
- Apps will cease to work: There may be also be a sign of proxying or other malware interfering with the apps’ functionality if apps that used to work properly suddenly stop working.
- Notification of increased data usage and text messaging: if you observe data or SMS usage and see greater use than expected, especially if that increase begins right after some “suspicious event,” that may be a sign that malware is transmitting data from your device to other parties. If you installed the app from a third party appstore you can try deleting the app and reinstalling it from a more trusted source–but if there is malware on your device, doing so may not always fix the problem.
- Post-paid cell phone bill shows unexpected charges: Cyber criminals can monitor your device to make expensive overseas phone calls on behalf of a remote party proxying through your device, can send SMS messages to international numbers, or ring up charges in other ways.
- Popups which never appeared on your device will be seen now: Alike computers some mobile-device malware produces pop-up windows asking the user to perform various actions. If you are seeing pop-ups, beware.
- Your e-mail from the device will be blocked by spam-filters: It could be a sign that your email configuration has been changed and email is now being relayed via some unauthorized server that is allowing a nefarious party to read your messages if email sent from your device is suddenly getting blocked by spam filters.
- Device seeming to access bad and malicious sites: If you use your device on a network that blocks access to known problematic sites and networks and you find out that it was trying to access such sites without your knowledge, your device may be infected. These problematic sites and networks include many businesses have such technology on both their corporate and bring-your-own-device (BYOD) networks.
- Unusual service disruptions: Normally, these problems are indicative of technical issues unrelated to a breach, but that is not always the case. If you experience calls being dropped, the inability to make calls at times when you appear to have good signal strength, or strange noises occurring during your phone conversations, something may be amiss.
- Leaking your private and confidential information: if you have experienced some data leak you should always check to determine the source of the problem–and the process of checking obviously includes examining your smartphone.
Recent versions of the Android operating system, as well as mobile antivirus software, can help spot and block malware-infection attempts. But neither approach is infallible. So no matter which security tools you might be using, be sure also watch for the above telltale warning signs.
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