Malware
Malware, or malicious code, is any software that performs an unwanted purpose for a computer system's legitimate user or owner. Malware security requires user behavior modification to prevent dangerous activities. Technology won't work without human risk reduction.
Ransomware
In many cases, ransomware is advanced enough to encrypt data stored on local and removable media, network file shares, and even in the cloud storage services.
To protect yourself from ransomware, it's important to take precautions like not engaging in risky activities, using anti-malware software, and regularly backing up your data
However, there is no assurance that the ransomware will be removed from the system even if you pay the ransom and obtain an encryption key to restore access to your data files.
Trojans
A Trojan or Trojan horse hides malicious software in a host file. Trojans by directly injecting malicious code into the host's source code
Worms
Worms don't need a host file or hard drive to infect a machine. Worms replicate and spread locally or over a network rather than directly damage and destroy.
Potentially unwanted programs (PUPs)
PUP is a marketing tool that changes browser settings and shows ads. Most PUPs are adware. PUP means potentially undesirable software.
Fileless virus
Programs that are designed to propagate from one system to another through the process of self-replication are known as viruses. Viruses can carry out a wide variety of harmful behaviours.
Fileless viruses simply live in memory and never copy themselves to the local hard drive or other storage media. They enter memory via a self-destructing file-based injector or a network to memory-writing event
Bots
Software robot network is shortened to botnet. A hacker remotely deploys malicious code onto several vulnerable systems
When the bot herder controls each bot, the botnet is directly controlled. Thus, bots have an open port listening for the bot herder. Command and control systems can control botnets indirectly.
Botnet infection code is often called a botnet agent, bot, or zombie.
Cryptomalware
Bad software, or malware, that is made to do cryptojacking over a long period of time.
