Home Ransomware Sigma Ransomware – Protection, Removal Tool, Prevention Guide
Sigma Ransomware – Protection, Removal Tool, Prevention Guide Sigma Ransomware – Protection, Removal Tool, Prevention Guide
Ransomware | 12/20/2018

Sigma Ransomware – Protection, Removal Tool, Prevention Guide

When was the last time you checked your PC health? Do you know your PC requires a regular Check Up!!!

Sigma Ransomware - A Malspam Pushing Threat

Most of the ransomware gets into your computer, slows the performance and functioning of the applications. Sigma Ransomware is also one high-class threat that infiltrates your computer and modifies the files of operating systems.

The newly found file cryptovirus leaks users info by infiltrating computer using sophisticated techniques like spam emails and corrupted text files. Therefore, the user must learn manual removal of Sigma ransomware virus before getting harmed.

Unfortunately, its attack implications are way beyond and could let you face;

  • Cost of replacing compromised devices
  • Loss of proprietary data
  • System downtime, which affects the ability to operate
  • Reputational damage
  • Potential legal penalties arising from poor security or handling of data

What is Sigma Ransomware?

SIGMA is a ransomware-type virus that distributes using spam emails containing a message. The message states that users will be charged $3000+ unless they open the attached MS Office document.

After opening the attachment and entering the provided password, users inadvertently execute unconfigured macros that immediately run Sigma ransomware.

Once infiltrated, it encrypts stored files using RSA-2048 cryptography and appends four random letters/digits as extensions to the name of the each encrypted file.

For example, sample.jpg is renamed to sample.jpg.Ka8E. Immediately after encryption, Sigma Ransomware also changes the desktop wallpaper followed by placing two files ReadMe.html and ReadMe.txt on the desktop.

The new desktop wallpaper has a short message encouraging victims to read newly placed HTML/.txt files. The HTML and .txt files contain an identical message stating that all the stored files are encrypted. Get a unique decryption key and decryptor tool.

sigma ransom note message

Unfortunately, the information is correct. Sigma uses an encryption algorithm and criminals hide decryptor tools and keys on a remote server. The cost of the decryption key and the associated tool is $1000 in Bitcoins.

Once payment is submitted, there is no such guarantee that you would be able to restore your files. Therefore, paying will only support cybercriminals. We strongly advise you to avoid all these instructions.

Also, Read: Krab Ransomware – Prevention Tips and Removal Guide

Impacts Of Sigma Ransomware

It quickly spreads through spam emails, websites, peer to peer file sharing, freeware, cracked or pirated software and social hijacking. It degrades the computer performance and compels you to pay money for your own files within some time limit.

Once victimized, the ransomware attacks your system and web browsers settings in the following ways;

  • It consumes high CPU power and lowers down the overall performance of your computer.
  • The computer boots up for no reason, freezes while you are working.
  • Slow internet browsing speed might cause the internet to stop unexpectedly.
  • Fake alert messages and notifications pop-ups to asking you to pay the ransom.
  • It leads to irrelevant web search redirections and highly affects your web browsing experience.
  • It steals your browsing information and personal data such as IP addresses, banking details, passwords and login credentials.
  • It also changes your Windows Registry editors to remain undetected from anti-viruses and anti-malware. Automatic download of executable files from unknown sources and unsecured websites.
  • Sending emails and maintaining your online presence on Social media though you aren’t logged in.

Cybercriminals via these threats steal information like IP address, URL’s Search, browser history, search queries, username, ID, passwords, banking information and ATM Card information.

Is Sigma Ransomware A Wiper?

While this ransomware performs standard user mode of encryption and does modify partition in hard drive, there is no way of inputting a Sigma ransomware file recovery key to recover your system. Thus, we may indicate that it is a wiper disguised as ransomware.

So it is hard to tell whether it is buggy ransomware or wiper disguised as one?

If you do not have any security software, then download a reliable software for Sigma ransomware removal. However, before that, you can use a few manual methods to see whether they can work against ransomware or not.

malware crusher

Gain Entry In Computer By Safe Mode with Command Prompt

Steps to be followed to enter the safe mode Win XP/Vista/7

  • Click start, then shut down, then restart.
  • While the computer is booting up at the very first screen start tapping F8 until you see the advanced boot options.
F8 safemode
  • In the advanced boot option’s, you need to select safe mode with Command prompt from the list of given options.

Steps to be followed to enter safe mode in Win 8/10

  • On the windows login screen, you need to press the power option.
  • Now, press and hold the shift key on the keyboard, and then click Restart.
  • Now, among the list of options you need to select Troubleshoot, and then advanced options, then startup settings and finally press restart.
Windows 8 safe mode
  • Once your computer restarts and gives you the list of startup options you need to select Enable Safe Mode with Command prompt.

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Restore System

  • Once you see the command prompt windows, type in cd restore and hit enter on the keyboard.
  • Now, type rstrui.exe and hit Enter again.
  • Then you would see new windows, click on next over there and select a restore point that is before the date of infection.
System Restore Point
  • Then, click next and followed by yes.

At present, your computer is in a state that has its file and data backed up at a safe restore point. We also suggest you to make a copy of your backed up data into some external hard drive.

It is now time, to reinstall your Windows via an external source such as pen drive, CD or DVD.

While installing Windows, allocates disk space to C,D and E drive. If asked to restore any files, select the restore point and get the backed up data into the new operating system.

Your system format is complete, also your data is backed up. Now you must create a strong firewall against such malicious threats to prevent the future attacks.

If you do not have any security software, then download Malware Crusher to prevent Sigma ransomware attacks. Also, you can use the below guides to make your system again in the working condition.

malware crusher

Prevent Entry Of Krab Ransomware

Malware Crusher is the most commonly used anti-malware software for the Windows computer. It’s malware removal capabilities makes it the most impactful tool and prevents you before the ransomware starts infecting your system because:

  • It’s real-time protection feature, performs a deep scan, detects malicious software and infected encrypted files within your system.
  • The Quarantine feature of the tool removes all infected files from your computer. Additionally, keeps a record of all deleted malicious program.
  • Malware Crusher also creates a shield against Ransomware, Adware, Malware, Browser Hijackers, Viruses, Extensions and Trojans from entering into your system.
  • The 24X7 online protective shield works as an anti-exploit technology and blocks the ransomware component before they hold files as a hostage.
  • Malware Crusher tirelessly visits all domains, URLs and web pages to secure your online presence from fraudulent entities.
  • Malware Crusher becomes fiercer in detecting keylogging, remote connections and saving your session data from being recorded.

To get a better security awareness on preventing cyber attacks and cyber security threats keep visiting us, forget not to download Malware Crusher.

Its 5-minute function could be a savior for your Windows computer!

Tips to Prevent virus and malware from Infecting Your System:
  1. Enable your popup blocker: Pop-ups and ads on the websites are the most adoptable tactic used by cybercriminals or developers with the core intention to spread malicious programs.
    So, avoid clicking uncertain sites, software offers, pop-ups etc. and Install a powerful ad- blocker for ChromeMozilla, and IE
  2. Keep your Windows Updated: To avoid such infections, we recommend that you should always keep your system updated through automatic windows update.By doing this you can keep your device free from virus.According to the survey, outdated/older versions of Windows operating system are an easy target.
  3. Third-party installation: Try to avoid freeware download websites as they usually install bundled of software with any installer or stub file.
  4. Regular Backup: Regular and periodical backup helps you to keep your data safe in case the system is infected by any kind of virus or any other infection.Thus always backup important files regularly on a cloud drive or an external hard drive.
  5. Always have an Anti-Virus: Precaution is better than cure. We recommend that you install an antivirus like ITL Total Security or a good Malware Removal Tool like Download Virus RemovalTool


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