Title : Identifying and Diagnosing Injected Gibberish URL Hacking: #NoHacked
link : Identifying and Diagnosing Injected Gibberish URL Hacking: #NoHacked
Identifying and Diagnosing Injected Gibberish URL Hacking: #NoHacked
Identifying and Diagnosing Injected Gibberish URL Hacking: #NoHacked
Hackers can turn your nondescript website into a malicious spy bot in a matter of minutes, sending sensitive user data to hackers without your even realizing it. Worse, they can hack into your website databases and destroy or manipulate important information, injecting your content with malicious links and even hijack the hosting server to be used in botnet DDoS attacks.
But enough of this scare fest. It’s not all doom and gloom out there on the Web. There are things that you can do to secure your website from hackers and becoming a target for online vandals.
How do you identify and diagnose a trending hack? Even if your site is not infected with a specific trending hack, many of the below steps can be helpful for other types of hacks.
Identifying Symptoms:
Gibberish pages
The hallmark of this type of hacking is spammy pages that appear to be added to the site. These pages contain keyword-rich gibberish text, links, and images in order to manipulate search engines. For example, the hack creates pages like www.example.com/download-2017-free-full-crack.html which contain gibberish content like below:
Cloaking
This hack often uses cloaking to avoid webmasters from detecting it. Cloaking refers to the practice of presenting different content or URLs to webmasters, visitors, and search engines. For example, the webmaster of the site might be shown an empty or HTTP 404 page which would lead the webmaster to believe the hack is no longer present. However, users who visit the page from search results will still be redirected to spammy pages, and search engines that crawl the site will still be presented with gibberish content.
Monitoring your Site:
Properly monitoring your site for hacking allows you to remedy the hack more quickly and minimize damage the hack might cause. There are several ways you can monitor your site for this particular hack.
Looking for a surge in website traffic
Because this hack creates many keyword heavy URLs that are crawled by search engines, check to see if there was any recent, unexpected surges in traffic. If you do see a surge, use the Search Analytics tool in Search Console to investigate whether or not hacked pages are the source of the unusual website traffic.
Tracking your site appearance in search results
Periodically checking how your site appears in search results is good practice for all webmasters. It also allows you to spot symptoms of hacking. You can check your site in Google by using the site: operator on your site (i.e. search for site:example.com). If you see any gibberish links associated with your site or a label that says “This site may be hacked.”, your site might have been compromised.
Signing up for alerts from Google
We recommend you sign up for Google Search Console. In Search Console, you can check if Google has detected any hacked pages on your site by looking in the Manual Actions Viewer or Security Issues report. Search Console will also message you if Google has detected any hacked pages on your site.
Also, we recommend you set up Google Alerts for your site. Google Alerts will email you if Google finds new results for a search query. For example, you can set up a Google Alert for your site in conjunction with common spammy terms like [site:example.com cheap software]. If you receive an email that Google has returned a new query for that term, you should immediately check what pages on your site are triggering that alert.
Diagnosing your Site
Gathering tools that can help
In Search Console, you have access to the Fetch as Google tool in Search Console. The Fetch as Google tool allows you to see a page as Google sees it. This will help you to identify cloaked hacked pages. Additional tools from others, both paid and free, are listed in the appendix to this post.
Checking for hacked pages
If you’re not sure if there is hacked content on your site, the Google Hacked Troubleshooter can walk you through some basic checks. For this type of hack, you’ll want to perform a site: search on your site. Look for suspicious pages and URLs loaded with strange keywords in the search results. If you have a large number of pages on your site, you might need to try a more targeted query. Find common spam terms and append them to your site: search query like [site:example.com cheap software]. Try this with several spammy terms to see if any results show up.
Checking for cloaking on hacked pages
Because this type of hacking employs cloaking to prevent accurate detection, it’s very important that you use the Fetch as Google tool in Search Console to check the spammy pages you found in the previous step. Remember, cloaked pages can show you an HTTP 404 page that tricks you into thinking the hack is fixed even if the page is still live. You should also use Fetch as Google on your homepage as well. This type of hack often adds text or links to the homepage.
Fixing the Injected Gibberish URL Hack
Temporarily Take your Site Offline
Taking your site offline temporarily will prevent your site’s visitors from going to hacked pages and give you time to properly fix your site. If you keep your site online, you run the risk of getting compromised again as you clean up your site.
Treating your Site
The next few steps require you to be comfortable making technical changes to your site. If you aren’t familiar or comfortable enough with your site to make these changes, it might be best to consult with or hire someone who is. However, reading through these steps will still be helpful.
Before you start fixing your site, we advise that you back up your site. (This backed up version will still contain hacked content and should only be used if you accidentally remove a critical file.) If you’re unsure how to back up your site, ask your hosting provider for assistance or consult your content management system (CMS) documentation. As you work through the steps, any time you remove a file, make sure to keep a copy of the file as well.
Checking your .htaccess file
In order to manipulate your site, this type of hack creates or alters the contents of your .htaccess file. If you’re not sure where to find your .htaccess file, consult your server or CMS documentation.
Check the contents of your .htaccess file for any suspicious content. If you’re not sure how to interpret the contents of the .htaccess file, you can read about it on the Apache.org documentation, ask in a help forum, or you can consult an expert.
Identifying other malicious files
The most common types of files that are modified or injected by this hack are JavaScript and PHP files. Hackers typically take two approaches: The first is to insert new PHP or JavaScript files on your server. The inserted files can sometimes be named something very similar to a legitimate file on your site like wp-cache.php versus the legitimate file wp_cache.php. The second approach is to alter legitimate files on your server and insert malicious content into these files. For example, if you have a template or plugin JavaScript file on your site, hackers might add malicious JavaScript to the file.
To effectively track down malicious files, you’ll need to understand the function of the JavaScript and PHP files on your site. You might need to consult your CMS documentation to help you. Once you know what the files do, you should have an easier time tracking down malicious files that don’t belong on your site.
Removing malicious content
As mentioned previously, back up the contents of your site appropriately before you remove or alter any files. If you regularly make backups for your site, cleaning up your site might be as easy as restoring a clean backed-up version.
However, if you do not regularly back up your site, you have a few alternatives. First, delete any malicious files that have been inserted on your site. For example, on www.example.com, you would delete the myhappypuppy.php file. For corrupted PHP or JavaScript files like json5.js, you’ll have to upload a clean version of those files to your site. If you use a CMS, consider reloading a fresh copy of the core CMS and plugin files on your site.
Identifying and Fixing the Vulnerability
Once you’ve removed the malicious file, you’ll want to track down and fix the vulnerability that allowed your site to be compromised, or you risk your site being hacked again. The vulnerability could be anything from a stolen password to outdated web software. Consult Google Webmaster Hacked Help for ways to identify and fix the vulnerability. If you’re unable to figure out how your site was compromised, you should change your passwords for all your login credentials,update all your web software, and seriously consider getting more help to make sure everything is ok.
Next Steps
Once you’re done cleaning your site, use the Fetch as Google tool to check if the hacked pages still appear to Google. You'll need to bring your site back online to test with Fetch as Google. Don’t forget to check your home page for hacked content as well. If the hacked content is gone, then, congratulations, your site should be clean! If the Fetch as Google tool is still seeing hacked content on those hacked pages, you still have work to do. Check again for any malicious PHP or JavaScript files you might have missed.
Bring your site back online as soon as you’re sure your site is clean and the vulnerability has been fixed. If there was a manual action on your site, you’ll want to file a reconsideration request in Search Console. Also, think about ways to protect your site from future attacks. You can read more about how to secure your site from future attacks in the Google Hacked Webmaster Help Center.
We hope this post has helped you gain a better understanding of how to fix your site from the injected gibberish URL hack. Be sure to follow our social campaigns and share any tips or tricks you might have about staying safe on the web with the #nohacked hashtag.
If you have any additional questions, you can post in the Webmaster Help Forums where a community of webmasters can help answer your questions. You can also join our Hangout on Air about Security on August 26.
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