Shock: 2/3 the backdoor is hidden by a black website

Shock: 2/3 the backdoor is hidden by a black website

Security experts from network security company Sucuri said they found that 68% of the Hacked websites had hidden backdoor scripts. These backdoor scripts will provide intruders with a second access to the secret channel. Even if the system administrator changes the password or applies a security patch, the system will still exist if the whole system is not completely cleaned up.

We can see from the hacked reports released by their website version 2016 Q1 that 11485 of the 4900 websites sampled all found backdoors.

Among these compromised websites, backdoors are the most serious problem, followed by malware (drive-by download) attacks through browser code, accounting for 60%.

The third place is SEO spam. about 32% of websites have this problem. SEO spam is usually Secretly embedded into the page, which is invisible to viewers and visible to search engine crawlers.

Trojan and SEO spam are also popular

SEO Spam can help malicious attackers increase the search engine ranking of their websites. For infected websites, SEO spam will be punished by search engines and its ranking will drop.

These attackers usually put SEO spam in the source code or database of the infected website, or use. htaccess redirection. In most cases, SEO spam is used in medicine and also for adult content or online games.

Compared with last year, the proportion of webshell scripts is slightly lower, SEO spam is slightly higher, and malware infection is the largest increase compared with previous years, from 2014 in 41% to 2016 in 60%! In comparison, webshell scripts fall from 59% in 73% to 68% in 20%, and now fall back to 28%. SEO spam increases from 28% to.

Website infection "popularity" for Q1 2016

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