Malware (Malicious Software)

What is Malware?

Malware is often equated with computer viruses. However, viruses are only one of many subcategories of malware. Malicious software is usually based on an encrypted code that you receive, for example, when you download a digital product or open a page. This code is then spread through various sources and becomes active on the affected device after the download.

The results are not always immediately obvious at first glance. Not all malware becomes active very quickly. Small programs can also secretly enter and scan data, analyze data flows, steal passwords, and cause visible damage only over a long period of time. Therefore, the best way to effectively prevent an Internet attack is to be careful. Especially for companies with internal networks, everything should be done to prevent malware attacks.

What Types of Malware Are There?

There are various categories within the field of malware. The following six categories are helpful in defining as many types of malware as possible and classifying the resulting damage.

Ransomware

With ransomware, access to certain data areas or the entire system is usually blocked. This is followed by a ransom demand, which implies that the blocked data will be released. However, there is no guarantee, so everyone who has important data on their own devices is at risk of ransomware.

Spyware

Spyware collects specific information about existing data and device systems. This makes it possible for a person to monitor internet activity for potential attackers. This includes, for example, login credentials, payment details, credit card information, and personal identity.

Worms

Worms aim to infiltrate various areas of a computer. To do this, a worm first infects the device, replicates itself, and then spreads to other devices. Worms are often used for transmission and can integrate additional malicious software that limits the device's security over time. Other worms only overload a device by replicating themselves and clogging networks.

Adware (Adware)

One of the most common signs of malware is adware. Here, the victim is confronted with numerous ads, including games, toolbars, or paid subscriptions. Adware also collects personal data and uses it to optimize ads and generate more revenue.

Trojan

A Trojan is a hidden attack that infiltrates a device, appearing as a legitimate software. In most cases, the Trojan is activated after installation and usually downloads additional malicious software. In some cases, eliminating the damage and successfully removing it may take several months.

Botnets

Botnets are not classic viruses, but rather a type of network. Devices or code associated with a botnet have the ability to execute malicious software and infect multiple devices. The resulting network provides more devices to coordinate new attacks that can increase damage.

What Does Malware Do?

Due to different types of malware, there are many risk factors for your devices. In this regard, ransomware is the most direct form of malicious software and appears within a few seconds after installation. Other malware only shows its effects later and does not stand out at first glance. In this way, they cause actual damage only later, while for example collecting data and information about device users.

As a rule, malware is programmed to cause specific damage. It serves a purpose and provides the necessary data for the computer hacker. The result is either active financial fraud or identity theft that can be used for later criminal offenses. Therefore, it is important to immediately detect and then remove malware. In addition, with the help of a malware scanner, it is possible to identify threats before they become effective and remove the malware from affected devices.

Which Devices Are Vulnerable?

In principle, no device is protected against malware infection. Especially Android operating systems are at risk if there is insufficient protection. Malware can also affect iOS, but this is much less common due to its massive security architecture. However, there are now malware that can automatically disable the security systems of devices such as Macs. A well-known example of malware specialized in macOS is CrescentCore. This malware searches for existing antivirus programs and security solutions within the device. If any are found, the malware terminates all programs to make detection impossible. The devices are then unprotected and vulnerable to any kind of malware. Therefore, it is always recommended to regularly check your systems.

How Can Malware Infection Be Detected?

A malware scanner can usually quickly determine which programs on the device could be the cause of damage. However, such a scanner is not always included in the device. Therefore, you should be aware of the following three symptoms that could indicate possible effects of malware:

• The computer is working much slower than usual.
• Storage space decreases without new programs being added.
• Pop-ups and unwanted programs are displayed.
• Some of the data is encrypted.

If you notice any of the mentioned symptoms, it is a good idea to install a malware scanner. This makes it easier to specifically identify and localize the damage without knowing too much about malware. This means that there is no need to harm the device first.

Protection Against Malware

In most cases, when a browser removes malware, it is completely deleted from the device. In this context, a malware scanner is a good investment to monitor all operating systems and reliably remove malware. For this purpose, free programs are available and can provide more transparency on your devices if desired. This gives you the opportunity to protect yourself against any kind of malware that could come to mind.

Malware often spreads to computers through email (for example, phishing emails). Fortunately, you can protect yourself against this by identifying these messages before malware enters your computer. This approach is effective for companies, for example with the Spam Filter Service or Advanced Threat Protection from Hornetsecurity.

Source: What is Malware? - Definition, Types and How to Protect Yourself (hornetsecurity.com)