Linux malware is malicious code built to run on Linux systems, including servers, cloud hosts, containers, and web infrastructure. It may install backdoors, download payloads, hijack processes, alter files, or launch redirects and proxying tools. Because Linux powers much of the internet’s backend, this malware often targets high-value public-facing systems rather than consumer desktops.
In cyber attacks, Linux malware matters because a compromised server can be abused quietly while still serving normal traffic. Attackers may use it to plant SEO spam, host phishing pages, manipulate web content, or create hidden access for later operations. Defenders look for unexpected binaries, modified web files, unusual outbound connections, suspicious cron jobs, and integrity changes on server directories. Strong patching, least privilege, file integrity monitoring, and log review are key controls against Linux malware on exposed systems.