Web Hanging Horse is one of the methods of Black hat seo?

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Before that, introduce the concept of the site is hung horse, what is the web hanging horse? The horse refers to the hacker invaded some websites, will write their own web Trojan (in fact, a section of the Web page code, mainly ASP and PHP code primarily) embedded in the black site's homepage, and then uploaded to space inside, When the viewer opens the page, the code is executed and the Trojan is run. The site was hanging horse probably many people have met, I have met several times. I used to take on a corporate website, the program is very simple, I use ASP to write, the security aspects of the program is not very understanding, so the site is directly uploaded to the space, because the code itself security is very low, the other may be the same server on the site was attacked, or the server was attacked caused my site is implicated, And this site was hung horse at least four or five times, each time after a few days to open and pop-up Trojan interception prompts.

Every time the site is hanging horse Some of the pages are inexplicable more than a script program, because the source program is my own writing, so it is clear which code is not more out. After several times was hanged horse also slowly groping out some rules:

1, Hung horse's page is generally have read the database page;

2, the general Hanging Horse Code is a JS script program, of course, this is only a case, it may be other forms, can not be generalized, such as hidden text.

3, this is the code generally appears in the tail of the page, such as </html> tag behind;

This time took over an IDC industry portal station and was Hung horse, this time than before all serious, can say a cup, due to the huge content of the site, and this was hung immediately weeks there are signs, but not aware of. There was a dislocation when you opened the website this morning. Think of the browser compatibility problem, changed the browser to open or the same, so look at the first source file, this does not see, a look startled, in the source code of the most behind the eldest section of the link code, open a look is all the mark six pages and some garbage station.

Combined with these days of site SEO observation, has changed:

1, Baidu snapshot back file. Originally, Baidu snapshot time is updated every day, this two-day snapshot not only update, but a setback one day, we all know that Baidu snapshot back to the file is either the Baidu server itself, or the site is down right, it is obviously belong to the latter.

2, Baidu Snapshot capture of the description of the horse was hanging the key words. Baidu snapshot of the site to view the time, incredibly in the Baidu automatic crawl that section of the description appeared in the above image of the keyword.

3, Alexa ranked decline. I wonder if this is also related to the hanging horse, but this is one of the changes.

4, the site traffic decline. If you open a website to find that this site has been hung horse, or for the site of this rare person to open the site on the pop-up malicious Trojan blocking tips, you will continue to visit?

5, the keyword ranking rise. Of course this certainly and the site is hanging horse nothing to do with, just these days SEO observation process occurred in the change.

Now the site has been added to the basic code to clear, because the temporary changes are not particularly large, also can not determine the site was hanging horse influence in the end how big, still remains to be seen. Just the kind of people who specifically attack people's website hanging horse is too unkind, and hanging or hidden text, do not look at the source code can not find, is this the legendary Black Hat Seo method? This article from the www.gh-yy.com reprint please specify the source thank you!