What is the code used by hackers to hang black chains?

Abstract: Black chain breeding and search engine environment is closely related, is because the search engine to do the import link for a site ranking weight of the key factors, so, some hackers aimed at a large number of high PR value of the site, they use the vulnerability scan Tool large

Black chain breeding and search engine environment is closely related, is because the search engine to do the import link for a site ranking weight of the key factors, so, some hackers aimed at a large number of high PR value of the site, they use vulnerability scanning tools to scan the Internet in large quantities of designated types of sites, Especially for a certain type of fixed program or source code, these programs or source code contains a person has been published or the hacker temporarily discovered a vulnerability or weak password, or upload a vulnerability, database download loopholes, near and upload some big horse into the server, get Webshell, Webshell refers to the code that has certain administrative rights, what is more, through the right to add Administrator account, open remote connection, complete control of the entire server.

Hackers are looking at the business value of the black chain, compared with the virus, in the current Chinese law, it seems that such violations are not to the extent of imprisonment. Below, we send out two pictures, say, black chain in the current market price positioning:

Through the pictures above, we can see that the black chain, also sold very expensive, some are linked to the black chain of the site, will generally be hung at the same time about 20 links, that is, if the hacker hand has 30 PR value of 5 Webshell, and sold to 20 users, then his profit is: 20*100* 3=6000, friends, dumbfounded, attention, this is only one months of profit. Such a high profit is the root cause of their lawlessness.

Below, we talk about, they hang black chain of the use of the code is how, we have counted, probably the following practices:

1.<a herf=http://www.xxx.com style= "display:none" > keyword </a>, Analysis: Display:none property settings It does not display.

2.<div style= "Position:absolute; Top: -999px;left: -999px; ><a herf=http://www.xxx.com> keyword </a></div>, analysis: position:absolute; Top: -999px;left: -999px property setting the div block display position is 999 pixels away from the upper-left corner of the screen, which is clearly not visible.

3.<marquee height=1 width=1 scrollamount=3000 scrolldelay=20000>

<a href=http://www.xxx.com > Keywords </a></marquee>, analysis: Set marquee length and height of 1, or 0, also do not display.

4.<div id= "URLs" ><a href= "http://www.xxx.com" > Keywords </a></div>

<script>document.getelementbyid ("URLs"). style.display= "None" </script>, analysis, through JS, set the Display:none properties of a block , the search engine does not analyze the actual function of this section JS.

The above 4 kinds of practices, the first unsafe, the second and third have been widely used, the fourth kind, see not much, but is the safest, but everything is not absolute, search engine in progress, as long as someone concerned, such black chain sooner or later will exit the network platform.

At present, there is a certain site users or webmaster, selected the black chain, through the short term in the bulk of high PR black chain to enhance the site rankings, effective? The answer is, if, I say, if, if the black chain is linked to 20, if it can survive one months, or effective, but, if the search engine identified, was hung black chain, or search engine identified who hung the black chain, then will be severely down the right or the removal of punishment. Black chain, is not normal network links, is a serious black tricks, is some internet strong bully performance, it should be despised by the industry, by the moral and legal restrictions. The black chain is bound to perish.

Only in this article to remind some of the black chain to ignore or love no matter the search engine, black chain seriously endanger the normal order of the network, please improve your technology, fight black chain is imperative. More to remind the General Webmaster, please check your website, to prevent people hanging black chain, no matter your site is hung black chain, or you on someone else's website hanging black chain, will have a negative impact on your site.

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