Hacktools are specially crafted tools to perform malicious or illicit activities, such as controlling botnets, mining bitcoins, triggering Denial-of-Service attacks and bruteforcing passwords. Those tools most of the time hidden in the filesystem and were installed among with other malicious code throug a vulnerability or an already compromised server.
Any vulnerable website with perl support. Outdated software or compromised passwords can act as an infection vector.
Inspect your server looking for any unknown perl file and remove them. Also, you can sign up with us and let our team remove the malware for you.