It's understandable that you may be concerned about unknown devices on your network, especially considering your previous experience with running malware. While I cannot provide a definitive answer without more information, I can offer some insights to help you assess the situation.
1. ISP and location: The fact that these devices have the same ISP and location as you could mean that they are connected to the same network infrastructure. However, this alone does not necessarily indicate malicious intent. It is possible that these devices belong to other users on your network, such as family members or roommates.
2. Length of presence: If these devices have been on your network for a while and you haven't experienced any issues, it could suggest that they are not actively engaging in malicious activities. However, it's important to note that some forms of malware can remain dormant for extended periods before being activated.
3. Network scanning: Using Kaspersky's network scanning feature is a good step to identify devices on your network. However, it's important to understand that it may not provide a complete picture of all devices, especially if they are configured to be stealthy or are using techniques to hide their presence.
Given the information provided, it is difficult to determine the nature of these devices definitively. Here are a few steps you can take to further investigate the situation:
1. Change your network password: Ensure that your network is secure by changing the password to prevent unauthorized access.
2. Monitor network traffic: Consider using network monitoring tools to keep an eye on the network traffic. This can help identify any suspicious activities or unusual connections.
3. Device identification: If possible, try to physically locate the devices and identify their owners. This can help clarify whether they are legitimate devices or potential threats.
4. Consult with an expert: If you remain concerned about the presence of these devices, it may be beneficial to consult with a cybersecurity professional who can assess your network and provide guidance based on your specific situation.
Remember, it's always better to err on the side of caution when it comes to network security.