A stealth virus may be a sort of virus malware that contains sophisticated means of avoiding detection by antivirus software. After it manages to urge into the now-infected machine a stealth viruses hides itself by continually renaming and moving itself round the disc.
Like other viruses, a stealth virus can take hold of the many parts of one's PC. When taking control of the PC and performing tasks, antivirus programs can detect it, but a stealth virus sees that coming and can rename then copy itself to a special drive or area on the disc, before the antivirus software. Once moved and renamed a stealth virus will usually replace the detected 'infected' file with a clean file that doesn't trigger anti-virus detection. It's a never-ending game of cat and mouse.
The intelligent architecture of this sort of virus about guarantees it's impossible to completely rid oneself of it once infected. One would need to completely wipe the pc and rebuild it from scratch to completely eradicate the presence of a stealth virus. Using regularly-updated antivirus software can reduce risk, but, as we all know, antivirus software is additionally caught in an endless cycle of finding new threats and protecting against them.
https://www.techslang.com/definition/what-is-a-stealth-virus/

A hybrid attack is a method that combines the dictionary attack with brute-force techniques. It starts with a list of known words (like in a dictionary attack) and then mutates them by:
* Appending or prepending numbers (e.g., password1, 123hello)
* Adding special characters (e.g., P@ssword!, admin#123)
* Varying letter casing or leetspeak (e.g., h@x0r)
From CEH v13 Courseware:
* Module 6: Malware Threats # Password Cracking Methods
Incorrect Options:
* B: Linear is not a password cracking method.
* C: Symmetric refers to encryption, not password cracking.
* D: Brute-force tries every possible combination but does not start with a word list.
Reference:CEH v13 Study Guide - Module 6: Password Cracking Techniques # Hybrid Attacks

In CEH v13 Module 03: Scanning Networks, service version detection is achieved using the -sV option in Nmap.
-sV: Enables version detection of open ports by sending probes to determine the service name and version (e.
g., Apache 2.4.49).
Helps identify potential vulnerabilities in specific software versions.
Option Clarification:
A: -SN: Ping scan (host discovery only).
B: -SX: Invalid/undefined option.
C: -sV: Correct option for service version detection.
D: -SF: Sends FIN packets (used in stealth scans), not for version discovery.
Reference:
Module 03 - Nmap Scan Types and Parameters
CEH Labs: Version Scanning with Nmap (-sV option)
Nmap Manual: https://nmap.org/book/man-version-detection.html

A hybrid attack combines the benefits of both dictionary and brute-force attacks. It takes words from a dictionary and applies modifications such as:
* Appending or prepending numbers or symbols
* Changing case (e.g., admin # Admin1!)
* Leetspeak substitutions (e.g., p@ssw0rd)
From CEH v13 Official Courseware:
* Module 6: Malware Threats
* Topic: Password Cracking Methods
CEH v13 Study Guide states:
"A hybrid attack is a combination of dictionary and brute-force techniques. It takes dictionary words and mutates them to cover common variations, making it more effective than pure dictionary attacks." Incorrect Options:
* A/B/D: These are not standard terminology in cryptographic or password auditing literature.
Reference:CEH v13 Study Guide - Module 6: Hybrid Attack TechniquesOWASP Password Attack Cheat Sheet

WS-Address provides additional routing information in the SOAP header to support asynchronous communication. This technique allows the transmission of web service requests and response messages using different TCP connections
https://www.google.com/search?client=firefox-b-d&q=WS-Address+spoofing
CEH V11 Module 14 Page 1896