The Hidden PHP Malware that Reinfects Cleaned Files

Website reinfections are a serious problem for website owners, and it can often be difficult to determine the cause behind the reinfection — especially if you lack access to necessary logs, which is usually the case for shared hosting services.

Some of the more common causes of reinfections are issues like cross- site contamination or unpatched website software security vulnerabilities that get re-exploited. In this post, I’ll share with you a different method: how attackers can reinfect your website files in under a second by having a single malicious process running on the web server.

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