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Go Back to Reverse Engineering Malware 101

Section 2: Malware Overview

Typical Attack Flow

Perimeter Recon	Infiltrate	Internal Recon	Entrench	Exfiltrate	Purge

Malware Classes

Class	Description
Virus	Code that propagates (replicates) across systems with user intervention
Worm	Code that self-propagates/replicates across systems without requiring user intervention
Bot	Automated process that interacts with other network services
Trojan	Malware that is often disguised as legitimate software
Ransomware	Malware that holds the victim's data hostage by cryptography or other means
Rootkit	Masks its existence or the existence of other software
Backdoor	Enables a remote attacker to have access to or send commands to a compromised computer
RAT	Remote Access Trojan, similar to a backdoor
Info Stealer	Steals victims information, passwords, or other personal data
HackTool	Admin tools or programs that may be used by hackers to attack computer systems and networks. These programs are not generally malicious
Hoax	Program may deliver a false warning about a computer virus or install a fake AV
Dropper/Downloader	Designed to "install" or download some sort of malware
Adware	Automatically renders advertisements in order to generate revenue for its author.
PUP/PUA	Potentially Unwanted Program, sometimes added to a system without the user's knowledge or approval

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