Just a few days ago, Sucuri researchers discovered a new malicious campaign aimed at vulnerable WordPress websites. Attackers were infecting the websites’ JavaScript files with snippets of malicious code. During these attacks, a certain piece of malware was distributed with the assistance of the infamous Neutrino exploit kit – Backdoor.Andromeda.
Unfortunately, this malicious campaign is not over, as researchers from Heimdal Security are currently investigating cases of compromised WordPress sites, this time spreading the TeslaCrypt ransomware. As of the ransomware’s version being spread, it is a rare one with a quite low detection rate. A piece of the ransomware has been uploaded on VirusTotal, and only 2 out of 56 antivirus vendors have detected it.
According to Heimdal’s report, more than 85 domains spreading TeslaCrypt have been blocked. Unfortunately, researchers expect the number of affected websites to grow in the upcoming days.
How is the attack carried out?
The attackers fed obfuscated Javascript code to these websites. The users who end up on the hacked websites are redirected on a domain called “chrenovuihren” via multiple servers.
The exploit kit used in the attack scenario is Nuclear EK, known to be available via the exploit-kit-as-a-service model. Nuclear is a sophisticated exploit kit that can exploit a range of vulnerabilities in:
- Adobe Flash Player;
- Adobe Reader and Acrobat;
- Internet Explorer;
- Microsoft Silverlight.
Learn More about Silverlight Vulnerabilities
The worst part is that hundreds of servers that host websites based on WordPress are compromised. In addition, if other domains are hosted on the same compromised server, they will be infected as well. Any attempts to sanitize such a website are deemed unsuccessful, as the other websites will re-infect it almost immediately.
We are currently witnessing an increased number of TeslaCrypt attacks. Users are contacting our ream saying that their files have been locked and a .micro extension has been appended to them. We cannot confirm that this particular malicious campaign involving WordPress and Nuclear EK is spreading the ‘.micro‘ version of TeslaCrypt, but it’s quite likely to be the case.
Learn More about TeslaCrypt ‘.micro’ Ransomware
How to avoid becoming a victim of a malicious attack?
Here are some pretty good security tips that you should follow closely in your daily online routines.
- Make sure to use additional firewall protection. Downloading a second firewall (like ZoneAlarm, for example) is an excellent solution for any potential intrusions.
- Make sure that your programs have less administrative power over what they read and write on your computer. Make them prompt you admin access before starting.
- Use stronger passwords. Stronger passwords (preferably ones that are not words) are harder to crack by several methods, including brute forcing since it includes pass lists with relevant words.
- Turn off AutoPlay. This protects your computer from malicious executable files on USB sticks or other external memory carriers that are immediately inserted into it.
- Disable File Sharing – it is recommended if you need file sharing between your computer to password protect it to restrict the threat only to yourself if infected.
- Switch off any remote services – this can be devastating for business networks since it can cause a lot of damage on a massive scale.
- If you see a service or a process that is external and not Windows critical that is seemingly being exploited, disable it until there is an update that fixes the exploit.
- Make sure always to apply the critical security patches for your software and OS.
- Configure your mail server to block out and delete suspicious file attachment containing emails.
- If you have a compromised computer in your network, make sure to isolate immediately it by powering it off and disconnecting it by hand from the network.
- Make sure to educate all of the users on the network never to open suspicious file attachments, show them examples.
- Turn off any non-needed wireless services, like Infrared ports or Bluetooth – hackers love to use them to exploit devices. In case you use Bluetooth, make sure that you monitor all of the unauthorized devices that prompt you to pair with them and decline and investigate any suspicious ones.
- Employ a powerful anti-malware solution to protect yourself from any future threats automatically.
Anti-spam security tips
Spam email campaigns are often employed in attack scenarios. Here’s how to increase your security against spam:
- Employ anti-spam software, spam filters, aimed at examining incoming email. Such software serves to isolate spam from regular emails. Spam filters are designed to identify and detect spam, and prevent it from ever reaching your inbox. Make sure to add a spam filter to your email. Gmail users can refer to Google’s support page.
- Don’t reply to dubious email messages and never interact with their content. Even an ‘unsubscribe’ link within the message body can turn out to be suspicious. If you respond to such a message, you will just send a confirmation of your own email address to cyber crooks.
- Create a secondary email address to use whenever you need to register for a web service or sign up for something. Giving away your true email address on random websites is never a good idea.
- Your email name should be tough to crack. Research indicates that email addresses with numbers, letters and underscores are tougher to crack and generally get less spam emails.
- View your emails in plain text, and there’s a good reason why. Spam that is written in HTML may have code designed to redirect you to unwanted pages (e.g. advertising). Also, images within the email body can be used to ‘phone home’ spammers because they can use them to locate active emails for future spam campaigns. Thus, viewing emails in plain text appears to be the better option. To do so, navigate to your email’s main menu, go to Preferences and select the option to read emails in plain text.
- Avoid posting your email address or a link to it on web pages. Spam bots and web spiders can locate email addresses. Thus, if you need to leave your email address, do it as it follows: NAME [at] MAIL [dot] com or something similar. You can also look for a contact form on the website – filling out that form shouldn’t reveal your email address or your identity.
Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter
Milena Dimitrova
An inspired writer and content manager who has been with SensorsTechForum since the project started. A professional with 10+ years of experience in creating engaging content. Focused on user privacy and malware development, she strongly believes in a world where cybersecurity plays a central role. If common sense makes no sense, she will be there to take notes. Those notes may later turn into articles! Follow Milena @Milenyim
Follow Me:
Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
- Verify Facebook, LinkedIn and Twitter personal profiles.
How to Remove from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove
Step 2: Uninstall and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully uninstall most programs.
Step 3: Clean any registries, created by on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Scan for with SpyHunter Anti-Malware Tool
Step 5 (Optional): Try to Restore Files Encrypted by .
Ransomware infections and aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
Get rid of from Mac OS X.
Step 1: Uninstall and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
→ ~/Library/LaunchAgents
/Library/LaunchDaemons
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 3 (Optional): Try to Restore Files Encrypted by .
Ransomware infections and aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
FAQ
What is ransomware and how does it work?
is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
How does ransomware infect my computer?
Via several ways. Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.
This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.
Another way, you may become a victim of is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to open . files?
You can't. At this point the . files are encrypted. You can only open them once they are decrypted.
Decryptor did not decrypt my data. What now?
Do not panic and backup the files. If a decryptor did not decrypt your . files successfully, then do not despair, because this virus is still new.
One way to restore files, encrypted by ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.
How Do I restore "." files (Other Methods)?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore . files.
These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How do I get rid of ransomware virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate ransomware and then remove it without causing any additional harm to your important . files.
Also, keep in mind that viruses like ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.
What to Do If nothing works?
There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:
- Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
- Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
- Also, check if some of the files that were encrypted it can be re-downloaded from the web.
- Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
- You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.
More tips you can find on our forums, where you can also asks any questions about your ransomware problem.
