Linux Security
Linux Security
Linux Security

What You Need to Know About Linux Rootkits [Updated] - Rootkit Prevention and System Monitoring

Date 20 Jun 2020
340089
Posted By Brittany Day
LinuxRootkitsThumbnail

Article Index

Rootkit Prevention and System Monitoring

The only surefire way to prevent a rootkit is to minimize the opportunities an attacker has to gain access to your system and install an exploit. In order to install a rootkit, malicious actors must gain administrative access to the system they are targeting in some way - whether it be by tricking a user into granting them root access or by compromising the system using a security vulnerability. For example, threat actors may compromise a web server, overwrite a system file with their own malicious file or use a system program in a way in which it wasn't intended to be used in order to gain administrative access to a system and install a rootkit.

As you now understand, system hardening is critical in preventing the installation of rootkits on your system. Users should always engage in good security behaviors including applying security patches, implementing the principle of least privilege, installing antivirus software like ClamAV, reducing the attack surface on their system and preferably using SELinux. Engaging in security best practices that are effective in defending against all types of malware such as checking permissions, enabling firewalls, ensuring that remote access portals are properly secured, monitoring network activity, enabling multi-factor authentication (MFA), reviewing system logs regularly and implementing a reputable cloud email security solution will also help protect against rootkits.

Finally, you can monitor your system using a technique called file integrity to detect rootkits quickly by scanning the system for changes. The idea is to make a fingerprint of the machine right after a fresh install and after each newly installed program. A fingerprint is a cryptographic hash function which makes a hash that is dependent upon each bit of data in a file. After this hash is made, by calculating and comparing the stored hash value with the current hash value, changes in data can be detected. 

Advisories

LinuxSecurity Poll

How frequently do you patch/update your system?

No answer selected. Please try again.
Please select either existing option or enter your own, however not both.
Please select minimum 0 answer(s) and maximum 3 answer(s).
/main-polls/52-how-frequently-do-you-patch-update-your-system?task=poll.vote&format=json
52
radio
[{"id":"179","title":"As soon as patches\/updates are released - I track advisories for my distro(s) diligently","votes":"67","type":"x","order":"1","pct":75.28,"resources":[]},{"id":"180","title":"Every so often, when I think of it","votes":"14","type":"x","order":"2","pct":15.73,"resources":[]},{"id":"181","title":"Hardly ever","votes":"8","type":"x","order":"3","pct":8.99,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

Please vote first in order to view vote results.

VOTE ON THE POLL PAGE


VIEW MORE POLLS

bottom 200

Please enable / Bitte aktiviere JavaScript!
Veuillez activer / Por favor activa el Javascript![ ? ]

We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.