DEFINITION 01
Adware
Adware is software that displays advertising, sometimes in intrusive or deceptive ways, and may also collect browsing or device information.
The CyberGuard field guide / Topics
Malware.
Recognize the types of malicious software, how they persist, and what they can do.
18 published definitionsPractical examples and source links
← Back to the dictionary
THE DEFINITIONS
Explore Malware.
Open a term for a plain-language explanation, a technical explanation, and a practical example.
DEFINITION 03
Command and Control
Command and control is the communication channel or process through which an attacker directs compromised systems and receives information from them.
DEFINITION 04
Computer Virus
A computer virus is malicious code that attaches to another file or program and replicates when that host is executed.
DEFINITION 05
Computer Worm
A computer worm is self-replicating malware that spreads to other systems without needing to attach to a host program.
DEFINITION 06
Cryptojacking
Cryptojacking is unauthorized use of someone else's computing resources to mine cryptocurrency.
DEFINITION 07
Dropper
A dropper is a program whose main role is to deliver or install another malicious component onto a system.
DEFINITION 08
Fileless Malware
Fileless malware is malicious activity that relies heavily on memory and legitimate system tools instead of a conventional standalone malicious file on disk.
DEFINITION 09
Keylogger
A keylogger is software or hardware that records keystrokes, often to capture credentials or other sensitive input.
DEFINITION 10
Loader
A loader is code that prepares and starts another malicious component, often by unpacking, decrypting, downloading, or injecting it.
DEFINITION 11
Malware
Software or firmware intended to perform unauthorized actions that harm a system or its data.
DEFINITION 12
Malware Persistence
Malware persistence is a mechanism that lets malicious access or code survive a restart, logout, credential change, or interruption.
DEFINITION 13
Ransomware
Malware used to deny access to data or systems and demand payment or another concession.
DEFINITION 14
Ransomware as a Service
Ransomware as a service is a criminal operating model in which a ransomware developer or operator supplies tools and infrastructure to affiliates who conduct attacks.
DEFINITION 15
Rootkit
A rootkit is software or a set of techniques used to conceal malicious presence or activity by changing what a system reports to defenders.
DEFINITION 16
Spyware
Software that secretly collects information or monitors activity without proper authorization.
DEFINITION 17
Trojan Horse
A Trojan horse is software that appears legitimate or desirable but performs an undisclosed malicious action when used.
DEFINITION 18
Wiper
A wiper is malware designed to destroy or make data and systems unusable rather than to hold them for ransom.
KEEP EXPLORING
Follow another topic.
Build context across the connected parts of cybersecurity.
Browse all other topics
Network Security 22Web Application Security 17AI Security 15Business Cybersecurity 15Incident Response 15Cloud Security 14Core Cybersecurity 6Cryptography 4Identity Access 4Phishing Social Engineering 4Vulnerability Management 4Fraud Online Safety 3Privacy Data Protection 2Security Technologies 2Threat Intelligence 2Endpoint Security 1Ethical Hacking 1Governance Risk Compliance 1Wireless Mobile Security 1