Malware refers to any computer code which, intentionally or otherwise, disrupts networks, steals information, or compromises the security of systems.
Malware poses an ever-present risk to any business's data and infrastructure. However, multiple strategies are available to combat its infection, including preventive mitigation techniques and education on this matter.
Unwanted software, or malware, refers to any form of program which causes damage without your knowledge and can include spyware, adware, viruses, and botnets that control computers, email accounts, or IoT devices.
Malware spreads via email attachments or websites, using viruses, worms, Trojans, and ransomware as distribution mechanisms.
A virus is a malicious software that infiltrates another program and allows it to duplicate itself, creating havoc if it gets onto your computer. They're difficult to spot and may cause severe harm - they pose real threats!
Many viruses infiltrate documents, while some can also infiltrate programs like word processing applications. Furthermore, viruses have also been known to infiltrate CDs, DVDs, and USB drives.
PUPs (Potentially Unwanted Programs) can often be bundled with free downloads from websites and can cause users to agree to install additional, potentially unwanted programs without realizing it. These packages may even come packaged as spam!
PUPs typically provide little benefit to users once installed and can often be considered adware or spyware. Once in, these applications often tamper with browser settings, display pop-up ads or collect personal data for marketing purposes.
An effective way to avoid downloading potentially unwanted programs (PUPs) is to read and agree to the license agreement when installing software. When downloading begins, a warning may ask you to read and accept its terms and conditions before installing anything.
PUPs (potentially unwanted programs) can be found bundled within custom installers from software download repositories or downloaded directly from file-sharing networks.
Malware refers to any software program designed to damage computers and networks. This includes viruses, worms, and trojans, among many others.
Worms can also launch ransomware attacks that require victims to pay to access their systems again and open backdoors that enable attackers to gain unauthorized entry to an infected system or network.
Some worms are spread via email and instant messaging attachments, while others infect USB drives. Others can still spread via file-sharing networks like BitTorrent.
Many computer worms exploit vulnerabilities in software or operating systems, while others spread by targeting specific applications, websites, or Internet-connected devices. Examples include Morris Worm, which infiltrated thousands of UNIX systems in 1988; Stuxnet, which targeted industrial control systems to disrupt Iran's nuclear program; and numerous Trojans, which steal personal information or passwords from users.
Individuals and organizations looking to avoid worms must use best practices for cybersecurity to remain vigilant. Regular updates of software and operating systems should ensure any known vulnerabilities are patched; comprehensive anti-malware software and firewall protection should also be deployed against potential attacks from worms and other forms of malware.
If a worm causes significant damage to an infected system, it can usually be removed through system restoration or rebooting of the computer. However, some worms are difficult to detect and remove as they hide within programs until being released at predetermined times.
Ransomware is malware that uses encryption techniques to render files inaccessible until ransom payments are made to restore them. These algorithms typically employ complex mathematical code that makes deciphering impossible without special keys held by their attacker.
Ransomware attacks your computer in many ways, from social engineering and email spamming to installing malware onto devices that share files. More sophisticated forms of ransomware exploit security vulnerabilities to gain entry.
Malware typically displays a message stating that your files have been encrypted and demanding a ransom to restore them, whether via text message, email, or pop-up alert.
Some advanced ransomware variants can encrypt an entire hard drive and prevent accessing any other systems on your network, and display a countdown clock warning you that your data will be deleted unless payment is made within a set timeframe.
This presents a grave threat to anyone requiring access to information, especially small and medium-sized businesses (SMBs) and public institutions that possess irreplaceable data that would be devastating in its loss or destruction.
The best way to thwart ransomware is to protect and encrypt your data regularly using backups, install an antivirus program on your system, and ensure all devices on your network are up-to-date and protected from threats.
Cryptojacking (malicious crypto mining) is malware that utilizes your computer resources without your knowledge or permission to generate cryptocurrency without your approval, often exploiting desktops, laptops, smartphones, or network servers as its targets.
Social engineering techniques like phishing can spread this threat. Victims receive emails that appear authentic and click on links or attachments that lead to downloading and installing crypto-mining software. Attackers may also embed this code on websites or YouTube ads.
Cryptomining software uses your device's computing power to solve complex mathematical problems that confirm on the blockchain; each time one solves such a challenge, they are rewarded with cryptocurrency that can then be sent directly into their virtual wallets.
As with ransomware, cryptojacking can be difficult to identify without an effective monitoring solution. One of the earliest symptoms of crypto jacking may include decreased system performance and battery drain.
Organizations can combat this issue by employing security solutions that monitor and correlate server utilization over time, creating a baseline or expected value, then sending alerts when actual utilization falls outside this range.
Companies can protect their networks by installing firewalls and antivirus tools that detect and block crypto-mining malware, helping deter hackers from infiltrating your network, stealing data, or infecting other systems. These solutions can prevent intruders from infiltrating it and stealing valuable resources such as crypto miners from attacking.
Spyware is malicious software that infiltrates computers without their owners' knowledge and secretly monitors, captures, or collects information without their knowledge, sending or selling it to malicious parties for a fee - this includes credit card and bank account numbers, passwords, user IDs, and banking details.
Spyware can infiltrate devices through several means, including drive-by downloads, phishing websites, and social engineering. Cybercriminals may also distribute it via spam emails with pop-up ads or malicious download links.
Users commonly infect their devices by clicking on a malicious link in an email or social media post containing malicious software - often through spam emails, pop-up ads, or text message links. These malicious links could contain phishing scams, pop-up ads, or text message links that comprise a device.
Spyware can then track their web activity, gathering personal data such as their name, address, credit card number, and banking details that could then be used for identity theft or fraud. Spyware comes in many varieties, each designed to target a different user. Examples of spyware include system monitors, tracking cookies, Trojan horse viruses, and keyloggers.
Some forms of spyware are more invasive, capturing sensitive data to be sold to third parties for a fee. Such programs may gain access to browsing history, email accounts, saved passwords, and credit card data without permission from users.
These programs can alter computer settings and a user's home page, as well as manipulate search engines into returning unwanted or fraudulent websites or force browsers to display annoying pop-up ads repeatedly. Such attacks can severely reduce performance, consume CPU capacity and disk usage, and compromise internet connections - significantly decreasing performance overall and hindering online connectivity.