Understanding Malware & Threat Vectors
An introductory reference breaking down common variants of malicious software, their distribution methods, and remediation avenues.
Author: David Catino
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Malicious software can compromise host systems via multiple infection vectors, including unverified USB storage media, web-based drive-by downloads, compromised browser extensions, or pre-installed OEM supply-chain vulnerabilities.
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If you suspect an active infection on local infrastructure, isolate the machine from the network immediately and seek professional threat remediation and data recovery.
Common Malware Classifications
| Variant | Primary Behavior & Characteristics | |
| Spyware | Silently monitors user activity, logging credentials and harvesting sensitive personal data. | |
| Rootkits | Provides deep, administrative-level OS access while actively hiding its presence from standard detection tools. | |
| Viruses | Malicious code that attaches to legitimate programs and replicates when the host application executes. | |
| Worms | Standalone malware that self-replicates across networks without requiring user interaction or host files. | |
| Keyloggers | A specialized form of spyware that captures keystrokes to steal passwords and financial entries. | |