Malware authors, with some notable exceptions, tend to design their malicious code to hide from sight. The techniques they use help their malware stay on the victim’s website for as long as possible and ensure execution. For example — obfuscation techniques, fake code comments, naming conventions for injections that deploy SEO spam, redirect visitors to malicious third party websites, or steal credit card information from eCommerce stores.
To combat malware and keep WordPress websites safe from threats a variety of different security software has been developed in the form of plugins or extensions.
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