Cybersecurity's ever-expanding lexicon and branching classifications often lead to terms becoming mistakenly synonymous. Malware and ransomware are good examples of this issue as these two terms many use interchangeably despite a clear difference in what they represent.
This article provides an in-depth malware vs ransomware comparison. We outline the differences between the two overlapping terms, explain why some people confuse the two, and help you better prepare for all malware-based threats.
Malware vs Ransomware: Key Differences
Let's start by defining both terms:
- Malware (short for malicious software) is an umbrella term for various programs designed to intrude, disrupt, or damage IT systems and networks.
- Ransomware is a specific type of malware that encrypts data and deletes original files to force the victim to pay a ransom for the decryption key.
The table below provides a head-to-head malware vs ransomware comparison:
|Point of comparison||Malware||Ransomware|
|End-goal||It depends on the type of malware and may include spying on user activity, hijacking control, gaining unauthorized access to data, disturbing IT operations, setting up other types of cyber threats, etc.||Encrypt as many files as possible and force the victim to pay a ransom for the decryption key|
|Danger level||Ranges from mild to severe depending on the type of malware||Devastating and long-lasting consequences (one in five SMBs shuts down permanently after a successful ransomware attack)|
|Go-to attack vectors||Infected email attachments, scareware, phishing, drive-by downloads, malicious ads, links on suspicious websites, and infected portable drives||Rootkits and social engineering tactics that trick the victim into clicking a malicious link or downloading an infected file|
|Variety||Many variants (viruses, worms, Trojan horses, spyware, adware, ransomware, spam bots, etc.)||Only two types (crypto and locker), but thousands of variants (WannaCry, Petya, Locky, Cryptolocker, REvil, etc.)|
|Ease of removal||You can remove most malware with an anti-virus tool||Most variants are either extremely hard or impossible to remove once infected|
|Main indicators of infection||Corrupt data, slow performance, apps freezing or crashing, browser redirects, annoying pop-ups, and unusual error messages||Encrypted files and a message demanding a ransom|
|Best prevention strategies||Keep software up to date, use anti-virus tools, and avoid suspicious downloads and attachments||Regularly back up valuable data and be cautious with emails from unknown or suspicious sources|
What Is Malware?
Malware is a broad term that encompasses a variety of malicious software that harms, exploits, or disrupts devices or networks. Cybercriminals use malware to perform a range of different objectives, such as:
- Spy on the victim's online activity.
- Steal sensitive info required for identity theft.
- Destroy files or cause data corruption.
- Slow down a system.
- Distract the security team from other malicious activity.
- Take over the control of a device.
- Misuse the device's underlying hardware.
- Redirect traffic.
- Set up other types of cyberattacks (such as APTs or DDoS).
Some forms of malware are more dangerous than others. For example, adware (malware that displays ad banners while you use other programs) hurts the user experience and slows down performance, but is relatively harmless as long as you don't click on ads. Other types of malware (such as ransomware and rootkits) are extremely dangerous and often result in permanent data loss.
How Does Malware Work?
Different malware types work in different ways, but all of them attempt to go through the same series of steps:
- Infect a system.
- Remain undetected.
- Carry out some form of harmful activity.
All malware infections start with system infiltration. Here are a few common scenarios in which malware installs on a target system:
- A staff member clicking an infected link or attachment in a phishing email.
- Someone accidentally downloading an infected file from a compromised website.
- A disgruntled employee installing malicious software on purpose (the so-called insider threat).
- Someone visiting a shady website where they click an infected ad or download a program with malware-infected files.
- A hacker exploiting a zero-day system vulnerability.
- An employee using an infected device to connect to a corporate network.
Once malware enters the system, the program begins executing its code. Typically, this process occurs stealthily as programs hide their presence by modifying system files or using encryption. Most malware programs also attempt to spread to other systems on the same network.
All malware has a specific payload (the action or attack the program is designed to carry out). Different types of malware have different goals. For example, a virus corrupts files while spyware attempts to steal useful data.
Here are the best methods of preventing malware:
- Use anti-virus and anti-malware software.
- Keep software and operating systems up to date with the latest patches.
- Avoid suspicious websites and downloads.
- Think twice before clicking email attachments and links.
- Use ad blockers to avoid malware-infected pop-ups.
- Back up valuable data regularly.
- Use a firewall to block unauthorized access to your computer.
- Don't disable security features on cybersecurity tools.
Remember that some types of malware create hidden files or registry entries to reinstall themselves once you remove the original infection.
Here are the most common types of malware:
- Trojan horses: A Trojan horse is a malicious program that appears as a legitimate application or file. Once executed, Trojans have a wide range of payloads (redirect traffic, set up a back door, export data, etc.).
- Virus: A virus is a type of malicious software that spreads between computers and causes damage to files and programs. The main characteristic of viruses is that they attach to data and apps to spread to new devices.
- Worm: A worm is a malicious program that does not require a host file or app to spread. Worms self-replicate and spread across networks by exploiting flaws in protocols and software. The most common goal of a worm is to cause network congestion or set up other types of malware.
- Cryptojacking: Crypto-mining malware enables a hacker to use someone else's computer to mine cryptocurrency.
- Spam bots: A spam bot uses the power and memory of the host device to perform repetitive tasks, such as directing web traffic as a part of a DDoS attack or sending spam messages.
- Adware: This type of malware displays unwanted ads and pop-ups on the user's screen. Adware slows down a system and interferes with normal usage.
- Spyware: Spyware secretly collects info about the victim, such as browsing habits, banking data, or passwords. This type of malware is a common choice when criminals want to gather info for identity theft.
- Rootkits. Rootkits give hackers access to unauthorized areas of a computer by modifying system files or registry entries. Hackers use rootkits to gain remote access to a system and set up more advanced types of malware.
- Ransomware: This type of malware encrypts the data on a device, after which victims must pay a ransom for the decryption key.
What Is Ransomware?
Ransomware is a type of malware that encrypts files on an infected device and instructs the victim to pay a ransom in exchange for the decryption key. Once ransomware executes on a device, the malicious program has several objectives:
- Encrypt as much data as possible.
- Exfiltrate files (transfer data to a remote server).
- Spread to other devices on the network in search of more data.
- Set up back doors for future attacks.
Ransomware attacks are highly disruptive and costly for businesses. Here are a few stats that demonstrate the seriousness of this cyber threat:
- Ransomware was the second leading cause of data breaches in 2022 (second only to phishing).
- The average cost of a ransomware attack on a business is $4.54 million (a figure that accounts for ransoms, reputation hits, fines, data recovery, and loss of business due to downtime).
- Businesses require an average of 49 days to return IT systems to a pre-incident state following a ransomware attack.
- The most likely targets for ransomware attacks are US-based businesses (around 47% of all incidents).
- Only 13% of organizations that suffered a ransomware attack in 2022 report not paying the ransom.
How Does Ransomware Work?
Hackers distribute ransomware in several ways. The most common strategies criminals rely on are:
- Infected attachments in phishing emails.
- Social engineering tactics that trick victims into clicking a link that leads to a website hosting ransomware.
- Malvertising (hacking legitimate online ads to spread malware).
- Drive-by downloads on unsafe websites.
- Exploit kits (programs that scan devices for software vulnerabilities and deploy malware if they detect a flaw).
Once ransomware enters a system, it scans the device for target files. The type of data the program searches for depends on the hacker's instructions (for example, a criminal might set ransomware to encrypt all Word documents and Excel sheets on the system). The ransomware then starts encrypting data and wiping any record of original files.
Most ransomware variants encrypt files at an incredible rate. On average, it takes around 45 minutes to encrypt 100,000 files. Some programs also steal data before encrypting it. That way, hackers can threaten to cause a data leakage if the victim declines to pay the ransom.
Once ransomware finishes encrypting data, there's no way to restore files without the decryption key. Criminals are willing to provide the key in exchange for a ransom, typically demanded in Bitcoin or other cryptocurrencies to prevent traceability.
Remember that paying the ransom is not a guarantee you'll recover lost data. Even if you meet the criminal's demands, there's a strong possibility that:
- You'll never hear from criminals again.
- Hackers will ask for further payments before sending the key.
- Scripts damaged data beyond repair, preventing you from decrypting some if not most files.
- Criminals still leak your files or sell them to the highest bidder.
Be one step ahead of the attacker. Learn how to recover from a ransomware attack with minimal downtime and damage.
A vast majority of ransomware attacks target Windows and Mac-based machines, but there's been a 146% increase in Linux-based attacks in 2022. Learn more about this often-overlooked trend in our Linux ransomware post.
There are two main types of ransomware:
- Crypto ransomware: This ransomware type (also known as data lockers) encrypts files on a computer, typically targeting only data with a specific extension.
- Locker ransomware: This ransomware type locks the user out of the entire computer instead of encrypting specific data. The hacker unlocks the device only after the target pays the ransom.
While there are only two primary types of ransomware, experts suspect that there are roughly 250 ransomware families out there (most of which are crypto ransomware programs). Some of the most dangerous recent variants are:
- Conti: This ransomware variant first emerged in late 2019. Conti both encrypts and exfiltrates data, plus has advanced encryption techniques and is notoriously hard to detect. Hackers used Conti in several high-profile attacks, including the attack on Ireland's national health service in May 2021.
- DarkSide: This ransomware variant appeared in 2021 when hackers used it to pull off an attack on Colonial Pipeline, a major fuel pipeline in the US. Like Conti, DarkSide both encrypts and exfiltrates data.
- REevil (a.k.a. Sodinokibi): REvil has been active since 2019 and has caused several attacks on high-profile targets (including the attack on Universal Health Services in September 2020).
- Ryuk: Ryuk has been active since August 2018 and is a go-to weapon of choice for hackers going after ambitious targets. Unlike most other variants, criminals behind Ryuk conduct heavy reconnaissance to prepare attacks, plus have a manual intervention during the infection to ensure the encryption process is successful.
- LockBit: This variant first appeared in 2019, but it gained popularity among criminals following an update in 2021. LockBit is notorious for its fast and efficient encryption process that, while prone to data corruption, scrambles files faster than most other variants.
Check out our article on ransomware examples for an in-depth analysis of all major ransomware variants that appeared in recent years.
All Ransomware Is Malware, but Not All Malware is Ransomware
Educating your team on the difference between malware and ransomware both clears up confusion and helps prepare the staff for malware-based threats. Since employees are always the most vulnerable attack vector for malware, ensuring everyone's up to date with the cybersecurity terminology must be a priority for every cautious organization.