How do web viruses spread?

Webpage viruses are viruses that use web pages to cause damage. They use some malicious codes written in some SCRIPT languages ​​to exploit browser vulnerabilities to achieve virus implantation.

When users log into certain websites that contain web viruses, web viruses are quietly activated. Once these viruses are activated , you can use some resources of the system to cause damage. (Recommended learning: web front-end video tutorial)

It can range from modifying the user's registration form to change the user's homepage and browser title to turning off many functions of the system. , install Trojan horses, and become infected with viruses, which prevents users from using the computer system normally. In severe cases, the user's system can be formatted. This kind of web virus is easy to write and modify, making it difficult for users to guard against it.

Webpage viruses use JS.ActiveX and WSH to work together to perform local write operations on the client computer, such as rewriting the registry, adding, deleting, and changing folders or files on the local computer hard disk. Wait for operations. But this function just gives an opportunity for web viruses and web Trojans to take advantage of.

Webpage viruses enable various illegal malicious programs to be automatically executed because they are completely beyond the control of the user. Once you browse a webpage containing a virus, you can be infected immediately without knowing it, causing varying degrees of damage to the user's system, such as general, mild, severe and malignant damage. It will cause you unbearable suffering, and even cause heavy losses that cannot be compensated.

Since it is a web page virus, to put it simply, it is a web page, but when this web page is run locally, the operations it performs are not just downloading and reading out, but also accompanying the former. Behind the operation, there is also the downloading of the virus original software, or the downloading of the Trojan horse, and then executing it, quietly modifying your registry, etc... So, what are the characteristics of this kind of webpage?

(1) Beautiful web page name, and taking advantage of the browser’s ignorance

(2) Taking advantage of the viewer’s curiosity

(3) Unconscious browser

It mainly exploits security vulnerabilities in software or system operating platforms, etc., by executing Java Applet small applications, javascript script language programs, and ActiveX software components network interaction technology support embedded in the HTML hypertext markup language of web pages, which can automatically The executed code program is an illegal malicious program with the goal of forcibly modifying the registry settings and system utility configuration programs of the user's operating system, or illegally controlling system resources to steal user files, or maliciously deleting hard disk files or formatting the hard disk.

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