@jennwin
Depending on what type of files these are you can only determin whether they are malicious by looking at the content.
Another option would be to use a malware\exploit scan plugin.
Or simply run the Malware Scan feature included in the iTSec plugin.
But in general the content of cache folders change all the time. So it would be best to exclude the cache folder from the File Change Detection scan. Saves you a lot of false positives …
Note the iTSec Pro plugin includes a Compare Files Online setting.
When enabled any file changes detected for WordPress core and iTSec plugins\themes files will be compared to clean online files to determin whether the change was malicious or not.
If the changed file is identical to the clean online copy the change is removed from the scan result.
If the info provided above answers your question please mark this topic as ‘resolved’.
dwinden
