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While communicating with one of the clients on various reasons for website hacking, we came to know that his WordPress website is victim of eval base64 decode hack i. When a trusted website is being redirected to an attack website [Also See — WordPress hacked redirect ], it means the website is hacked and the hacker has modified some Php scripts to create the automated redirection.
So here I decided the next topic I will be writing on. This is a code execution that is obfuscated by a base64 encoding scheme, the only reason this would be present is to hide malicious code. Generally if you find any suspicious base64 encoded commands you should decode strings and see what they contain. An eval base64 is a php function of hacked code which is used by hackers to gain control over your website.
Now this seems extremely dangerous. This code is not hard to remove manually from all of PHP written files but what if the all of the WordPress websites got infected by the malicious code again!
We need to understand the main cause of the malicious code injection. After investigating, we found the reasons behind the hacking of wordpress websites using eval base64 decode, listed below: Running an outdated version of WordPress. Type of hosting you use shared, dedicated, virtual. Vulnerable admin account exploit. If you ever send your password via an unencrypted protocol like FTP , stop doing that.
Loopholes in the code written. Installing outdated themes which use old php scripts. Old and vulnerable versions of themes. If your PHP files are being injected by eval base64 decode code line, the users coming from different search engines like Chrome, Firefox, yahoo, bing etc will be automatically redirected to a malicious website.
In simple words, the eval base64 decode is a php function call encoded in base64 which runs the decoded code. This helps the hacker to run any Php function and inject malware on your website. How does it works? There must be some code on your website which permits the malicious script of hacker to get executed on your server. As seen, hackers place the malicious line at the top of as many PHP files as they can.
Some intelligent hackers also place this function inside hidden folders which lets the hacker re-enter the website and make desired changes to the code in order to create automated redirection. Detecting malware in a wordpress website and fixing it is tedious and time consuming.
You have to go through every results to determine if there is malicious code being executed. But thanks to our wordpress malware scanner , now you can skip through the tedious process. Once you submit your website in our online WordPress Base64 Hack Cleanup tool , it carefully analyzes all the files on your WordPress website for any malicious code. How to perform WordPress eval base64 hack cleanup? In order to perform base64 hack cleanup on a WordPress website, follow these steps as mentioned: STEP 1 — Make sure you always stay up-to-date with the new releases of WordPress versions.
If you are running an older version, it is important to update your WordPress to its latest version. In case, anything goes wrong, at least you have backup of the entire website data and will not lose anything. Thus, move all your files to a backup folder and then create a backup tarball. You can simply compress the whole website, and then download it to your system. Now you can compress the files to a ZIP file again, and upload it to the website and extract.
This is one of the simplest way to fix this PHP infected code. There are many other Base64 Decode Online tools available such as :.
Online eval gzinflate base64_decode decoder