A tool to detect Trojans
It's relatively easy for our computer to be infected by a Trojan. chkrootkit is a tool it can recognize. How it is now, he is looking for signs left behind.
Regular inspection of altered binary files.
Without the graphical user interface, it is a simple software that runs from the Linux command console. This way, you can identify the known rootkits by testing them against the different binaries they usually change. The tool can be run in two different ways: from a recovery disk, usually with a live CD or from a directory where all commands are executed.
However, there is a possibility that the program will not detect the weak files, as malware development is always one step ahead: advanced rootkits can find them and even try to find them. If you have trouble with the Trojans, give this tool a chance.