What Is A Ransomware?
Ransomware is a malware kind, which either locks the system’s display or blocks the user’s files unless the user pays his money for it, prevents or restricts user access to the system.
The attacker demands a ransom from the victims, which promises – not always true – to restore access to the data when paid. Once it is over your computer, it threatens you with harm, usually by denying you access to your data.
Instructions for paying a fee for the decryption key are shown to users. The cost can range from several hundred to thousands of dollars for Bitcoin cybercriminals.
Beginning around 2012, the use of scams ransomware has increased internationally. In the first six months of 2018, there were 181.5 million ransomware attacks. This represents an increase of 229 % over the same period in 2017.
Vendor McAfee released data showing that the number of ransomware samples it collected in the same quarter of the previous year was more than double that of the previous quarter.
A growing number of attacks have used remote desktop protocol and other approaches that don’t depend on any form of user interaction. Ransomware malware can be spread by malicious email accessories, infected software apps, infected external storage devices, and compromise websites
How Ransomware Works?
A number of ransomware vectors can be used to access a computer. Phishing spam is one of the common delivery systems — attachments that are sent by the victim in an email and are masked as a confident file.
They can take over the victim’s computer once downloaded and opened, particularly if they have built-in software technology tools that trick users to allow administrative access. More aggressive ransomware forms, such as NotPetya, exploit security holes to infect computers without needing to trick users.
Malicious code is created by the intruder as it would other kinds of malware to create. You can specifically use the code to control your computer, and then hijack all your files, so that you can no longer use the files in encrypted format.
After encrypting your files, in return for your files hijacked, you are very likely to get a demand for monetary compensation or other similar threat. Sometimes the money is small, sometimes hundreds of dollars can amount to money.
Another type of ransomware is created as a trojan, scanning all directories and drives of your PC and then encrypting all your files automatically, so that you do not access them.
By leaving a ransom note, the Trojan places the final touch on the intrusion.
Top 10 Ransomware Attacks:
1.Samsa-Ransomware: This ransomware focuses on a variety of sectors including medical services, industrial control, and government. The malicious software is designed to establish insecure RDP connections and vulnerable JBoss systems. Over 2 years ago, the ransomware was found and new variants are still released.
The Samsa attacks directly target organizations, first compromising a computer within a victim’s network, then using this compromised host to install ransomware on other computers in the victims ‘ network.
Last 12 months. Analysis and reverse engineering were evaluated fully by the Author. While we classify all samples as Samsa, attackers have used different names in order to identify their projects.
2.Dharma-Ransomware: Dharma Ransomware is a cryptovirus that encrypts user files and requires a ransom for a cryptovirus. The malware is delivered manually by attackers using TCP port 3389 for remote desktop protocol (RDP) services, which brutely forces the password to gain access to a computer.
Since 2016, a minimum of 15 variants of Dharma Ransomware has been published, with latest versions, including a contact attacher email address, and encrypted file extensions. Payment instructions differ from variant to variant.
Another variant of Dharma Ransomware, Dharma – Btc, appeared at the end of 2016 and gave victims instructions about how to make payments using bitcoin. This variant applies.BTC, similar to the Brrrr variant, to the file extension as well as the encryption and email contact address.
The number one defense, which is regarded as unsafe for most uses, against Dharma Ransomware removes support for RDP. Additional methods to protect Ransomware against Dharma include backup of important files and moving computers, which need to run RDP behind VPNs.
3.Matrix-Ransomware: Matrix ransomware is an early – designed malware cryptography locker which blames users for illegal activities (such as child pornography viewing or copyright downloading).While at the start of its functionality, the virus did not modify personal data on the computer, Matrix hackers eventually decided to add more functions.
The Ransomware matrix has two versions, both of which are used to encrypt files, and the victims should pay a ransom to get a decryption key. This comportment occurs in most ransomware encryption trojans.
This behavior is found in most Trojans ransomware encryption. The Matrix Ransomware allows the recognition of the files it encrypts since the Matrix Ransomware adds the matrix extension to the names of the files.
The two major threats facing businesses currently include Ransomware and ATAs, advanced, target attacks which have been designed for a specific environment, as noted in the 2019 EMA Security Megatrends report from SentinelOne.
Both types of threats and their combinations have been increasing in the last two years: targeted ransomware, such as Ryuk, SamSam and now Matrix.
4.Jigsaw-Ransomware: Jigsaw has been created in 2016 to encrypt ransomware malware. Initially, it was titled “BitcoinBlackmailer,” but later became known as the Jigsaw because it had an image of the Saw film franchise’s Billy the Puppet.
Once countdown timer begins when a victim is infected. If the $ 150 restitution is not paid, one file is deleted within the first hour. Over time, over one file is removed every hour. Each time the 60-minute timer is reset it increases.
Security scientists discovered that a Jigsaw version, ancient ransomware, is a bitcoin stealer. The Jigsaw is also referred to as BitcoinStealer through strings that are embedded in the malware code (detected by Trend Micro as “RANSOM JIGSAW.THGBDAH”).
The ransomware persists, although a number of different decryption tools can be overcome. Check Point, which last week reported its results, said it found a mechanism for checking whether payments are made using ransomware.
5.Fake Globe-Ransomware: Fake Globe alerts on encrypted files appear on their computers in front of users with ransomware. We classify this malicious software as dangerous and say it is better to prevent this threat from appearing than to try and find a solution.
Once the virus is inside, it will change the registry of your computer to allow it to boot on Windows. The removal process involves removing this registry and using anti-malware software the most secure way to do so.
The manual removal can damage the working of your Windows if you’re not careful.
When malware or other hazardous items appear on the system, the Fake Globe allows ccybercriminals to have remote access to the computer and perform malicious activities.
Antivirus often fails to detect installed malware as potentially unwanted because user allows built0in tools to be downloaded.
The Globe Ransomware is currently not very common. Central Asia is the principal destination for the Globe Ransomware. The sum required by Globe Ransomware is between 1 and 3 BitCoins (current at the current exchange rates between $ 600 and $ 1800 USD).
6.Scarab-Ransomware: The Ransomware Scarab is a Trojan ransomware encryption observed on 13 June 2017. The Ransomware Scarab is one of a large number of currently active HiddenTear versions. HiddenTear, a ransomware Trojan open source released in 2015, has created countless variants of the threat.
The common way in which the Scarab Ransomware is distributed is to include it in spam emails as a corrupted file attachment. The Ransomware scarab can be easily identified by marking the files it encrypts with the file extension.
The Scarab Ransomware scans the victim’s computer for certain file types in its infection process and then encrypts them with a strong coding algorithm. The Scarab Ransomware generates a ransom note after it has encrypted the victims ‘ files.
Furthermore, Scarab doesn’t seem to be packed in samples that we have found. The malicious code is written in Delphi without having the C++ packaging tt Scarab and the ransom notes are different in content and language.
Scarab, like most ransomware, is intended to ask victims to pay Bitcoin for their files on their systems after it has been encrypted. However, Scarab was found to target Russian users and to be distributed via RDP instead of distributer via Necurs malspam like the original Scarab.
7.Stop-Ransomware: STOP is a data locker that came in December 2017 for the first time. The malware uses AES and RSA algorithms to encrypt the data and to add an extension. STOP file. However, almost every month new versions have emerged and the virus is currently in progress.
Also worth mentioning is Keypass ransomware and Djvu ransomware one of the most famous models, which produced headlines in which the victims from more than 20 countries were targeted.
Djvu ransomware is currently the most active ransomware version of STOP that demands a 300 – 600 dollar ransom for data decrypter. The openme.txt malware is used,! or similar ransom notes, readme.txt.
STOP virus authors demand a 3-day payment of six hundred dollars. To provide evidence, hackers can send 1 – 3 “not very large” files to email@example.com or to firstname.lastname@example.org for free test decryption. However, these could be the only files after the ransomware you can get.
8.Ryuk Ransomware: Ryuk was first introduced in August 2018 and although not incredibly active worldwide, Ryuk infections have hit at least three organizations, landing at around $ 640.000 in restitution for their efforts in the first two months of its operations.
Despite a successful infection run, Ryuk has a feature of some other modern ransomware families. This includes the ability to detect, encrypt and delete shadow copies on endpoint drives and resources.
In the last two weeks, several organizations targeted and well-planned Ransomware, have been attacked by Ryuk. The campaign has so far targeted a number of companies and coded hundreds of PCs, storage and data centers in each of them.
Although no differences were observed in the sample taken, a longer, nice phrased note led to the highest recorded BTC payment of 50 (around $ 320.000) and the shortest, more blunt note were sent to the victim. Nothing had been discovered in the collected sample.
In another scenario, Crowdstrike, and Kryptos Logic say they saw the TrickBot group rent installations, TrickBot, and RYUK ransomware infections, from the authors of the malware.
9.GandCrab 5.2 – Ransomware: GANDCRAB 5.2 is a type ransomware program that developers (cyber criminals) use for encrypting and keeping data stored on victim’s computers until the ransom is paid. This program creates a rescue message and gives it a random name.
This will lock your personalized documents, videos, pictures and other files and then create an extension of your file. The ultimate goal is to pay the criminals behind that BitCoin or ZCash virus ransom payment to give them back access to their own files.
No tools (at least not currently) are available to decrypt GANDCRAB 5.2 files for free. Those with computers infected by this ransomware can, therefore, be challenged and forced to contact the developers.
Most cybercriminals use cryptography (symmetric or asymmetric) algorithms that make decryption impossible without using a certain tool. Sadly, these are just tools available to ransomware developers. The only free way to recover data is to use a backup when a computer gets GANDCRAB 5.2.
10.Anatova Ransomware: Anatova was discovered by Valthek and is classified as a malicious program ransomware type.
Anatova does not add an extension to the names of encrypted files and leaves their icons unchanged as opposed to other infections like this.
This software makes the Files unuseable and creates a rescue request message in the ANATOVA.TXT text file. After encryption, files can not be opened. The ransom message name may vary according to the Anatova ransomware version.
The most frequent infections in the United States, followed by Germany, Belgium, France, and the United Kingdom were observed. Interestingly, the malware does not infect systems from a list of all countries of CIS, including Syria, Egypt, Morocco, Iraq, and India.
Anatova ransomware scans for files smaller than 1 MB and checks for network shares, but you must not interrupt the operating system and raise the flag before encrypting the files. The encryption routine begins once files have been identified.
How To Stay Safe From Ransomware:
Some high – profile ransomware attacks have occurred in recent years as part of an increasing tide of threats. According to a recent NTT safety report, Ransomware volumes increased by 350 percent alone in 2017.
Safety professionals working with company data protection must have ransomware on their radars and it is important to take steps to mitigate the threat.
Prevention is always better than cure, but a safety system is not perfect so that by creating a recovery plan, it pays to prepare for the worst. Here we have a list of 10 best practices to help you prevent and detect ransomware attacks.
Some Tips To Prevent Ransomware:
- (a)Security awareness training, (b)Updates,patches and configuration, (c)Up to date asset inventory, (d)Continuous vulnerability assessment, (e)Real-time traffic monitoring, (f)Intrusion detection, (g)File integrity monitoring, (h) Log monitoring and analysis, (i)Continuous threat intelligence, (j)Reliable backup and recovery
- Do not pay for the rescue. It only encourages these assailants and funds them. Even if the restitution is paid, you can not be guaranteed to get your files back.
- Restore any files that have been affected by a well-known backup. The quickest way to recover access to your data is to restore your files from a backup.
- When answering an email, unsolicited call, text message or an instant message, do not give personal information. Phishers try to get employees to install malware or to gain intelligence for IT attacks. Contact your IT department.
- Use a well – known antivirus and firewall software. Keeping your security software up to date and maintain a strong firewall is essential. Because of all the fake software, it’s important to use antivirus software from a reputable business.
- Use your email servers to scan and filter content. Inbound emails should be scanned for known threats and any attachment types that might pose a risk should be blocked.
- Make sure all systems and software have the relevant patches up – to – date. Kits hosted on websites that are compromised are commonly used for spreading malware. To prevent infection, regular patches of vulnerable software are necessary.
- If you travel, please alert your IT department in advance, especially if you use the wireless public Internet. Ensure that when you access public Wi-Fi (Norton Secure VPN), you use a trustworthy VPN network.
For More Info: Security Threat Predictions For 2019