◆ Free WiFi and Automatic Connection
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Hackers can obtain important information from users’ mobile phones within 15 minutes through free WiFi, which undoubtedly poses a significant privacy risk to users.
Here, I will share with you the principles by which hackers obtain user phone information through free WiFi and specific prevention strategies.
Currently, hackers primarily use two methods to achieve their goals through free WiFi: one is to implement ARP spoofing via free WiFi to promote advertisements and increase page visits. This is mainly achieved using the “etterCap” tool for ARP spoofing.
Once they obtain the relevant packet information about the target phone, they start using the “wireshark” tool to capture data packets related to the current target phone for information analysis.
Another purpose of hackers using “free WiFi” is to achieve malware installation through DNS spoofing. They use the “ettercap” tool to deceive the target host. After selecting the host to deceive, they specify another address by using “Add Target 2”.
At the same time, they edit the “etter.dns” file to add the target websites or malware sites to be redirected to, thus achieving deception and planting trojans to obtain user phone data.
Security Recommendations
1. Set the method for connecting your phone to WiFi as “manual”. After using a public Wi-Fi network, remove or delete that Wi-Fi network. If you need to use it again, connect manually.
2. Try to turn off the wireless LAN function on your phone and laptop when not using Wi-Fi to prevent automatic connection to malicious Wi-Fi.
3. Once your phone or laptop connects to Wi-Fi, pay attention to the name of the Wi-Fi hotspot you are connected to.
4. Check the accuracy of the usernames of nearby free open WiFi.
Conclusion
Regarding Wi-Fi security, I believe you have learned a bit from our three posts. What should you do if you connect to a strange Wi-Fi and accidentally get infected with a trojan virus?
If it’s a systemic trojan, such as one that is sold externally, has been used, and registered, most antivirus software should be able to identify it. Additionally, when there are security risks with the phone antivirus software when connecting to strange WiFi, it will prompt you. At this point, it is best to choose not to connect. If, unfortunately, you have already been infected, you can only rely on antivirus software to clean the virus. If the antivirus software doesn’t work, then the only recommendation is to reinstall the system. If, unfortunately, you encounter programs coded by technical experts that may bypass the identification system and are seen as safe files or software, there is no solution but to reinstall the system!
Of course, the best method is to stay vigilant and avoid connecting to unfamiliar Wi-Fi. For specific countermeasures, please refer to this series of three posts!
Finally, I wish everyone a happy Labor Day and a pleasant holiday!
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