![\"\"](\"https:\/\/cdn-images-1.medium.com\/max\/1024\/1*Dw6QNF8pPhniOx2WCZE7GQ.png\")
In Day 2 of this Ethical Hacking series, we\u2019ll\u00a0explore:<\/p>\n
\u2022 What a virus is Let\u2019s dive\u00a0in.<\/p>\n A computer virus<\/strong> is a type of malicious software (malware) that spreads from one system to another and harms data or system performance.<\/p>\n Just like a biological virus spreads between humans, a computer virus spreads\u00a0through:<\/p>\n Once inside a system, a virus\u00a0can:<\/p>\n Attaches itself to files and spreads when the file is\u00a0opened.<\/p>\n Infects the system startup and runs when the computer turns\u00a0on.<\/p>\n Spreads through documents like Word or Excel\u00a0files.<\/p>\n Changes its code again and again to avoid detection.<\/p>\n Stays in memory and keeps infecting files over\u00a0time.<\/p>\n Malware means \u201cmalicious software\u201d<\/strong>\u200a\u2014\u200aany software designed to harm, damage, or misuse\u00a0systems.<\/p>\n All viruses are malware, but not all malware are\u00a0viruses.<\/strong><\/p><\/blockquote>\n Here are the most common\u00a0types:<\/p>\n Spreads automatically without user action, often through networks.<\/p>\n Looks like normal software but secretly performs harmful\u00a0actions.<\/p>\n Locks your files and asks for money to unlock\u00a0them.<\/p>\n Secretly collects your personal data (like passwords or activity).<\/p>\n Shows unwanted ads and may track your behavior.<\/p>\n Malware is one of the main tools attackers use<\/strong> to break into\u00a0systems.<\/p>\n Understanding attacks helps you think like an ethical\u00a0hacker.<\/p>\n Fake emails or messages trick users into giving passwords or personal\u00a0data.<\/p>\n Attackers send huge traffic to crash a website or\u00a0server.<\/p>\n Attacker secretly listens or changes communication between two\u00a0users.<\/p>\n Attackers insert malicious code into database queries to access\u00a0data.<\/p>\n Trying to guess or crack passwords using tools or techniques.<\/p>\n Ethical hackers use testing to find weaknesses before attackers do<\/strong>.<\/p>\n Tester has no information<\/strong> about the system. Example:<\/strong> Trying to hack a website without knowing its\u00a0code.<\/p>\n Tester has full knowledge<\/strong> of the system. Example:<\/strong> Reviewing source code to find security\u00a0flaws.<\/p>\n Tester has partial knowledge<\/strong>. Example:<\/strong> Logged-in user trying to exploit a\u00a0system.<\/p>\n These testing types help organizations identify and fix security weaknesses effectively<\/strong>.<\/p>\n Cybersecurity is teamwork. Different teams handle different responsibilities.<\/p>\n \u2022 Simulate real-world attacks Goal:<\/strong> Find weaknesses<\/p>\n \u2022 Monitor systems Goal:<\/strong> Protect\u00a0systems<\/p>\n \u2022 Combines red and blue teams Goal<\/strong>: Improve overall\u00a0security<\/p>\n Cyber threats are everywhere, but understanding them is the first step to defending against\u00a0them.<\/p>\n In Day 2, you\u00a0learned:<\/p>\n \u2022 What a virus is and how it spreads This knowledge helps you start thinking like an ethical\u00a0hacker<\/strong>.<\/p>\n In Day 3<\/strong>, we will\u00a0explore:<\/p>\n Linux for Ethical Hackers (Commands, Setup & Practice)<\/strong><\/p>\n Stay tuned and keep learning🚀<\/p>\n Like, subscribe and share if You love\u00a0content<\/strong><\/p>\n Ethical Hacking for Beginners \u2014 Day 2: Viruses, Malware, Cyber Attacks & Security Testing<\/a> was originally published in OSINT Team<\/a> on Medium, where people are continuing the conversation by highlighting and responding to this story.<\/p>","protected":false},"excerpt":{"rendered":" Introduction Imagine turning on your computer one day and finding all your files locked, your data stolen, or your system completely unusable. This is not science fiction\u200a\u2014\u200ait happens every day due to viruses, malware, and cyber attacks. But here\u2019s the good\u00a0news: If you understand how these attacks work, you can protect yourself and even stop\u00a0them. … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":408,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/posts\/407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/comments?post=407"}],"version-history":[{"count":0,"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/posts\/407\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/media\/408"}],"wp:attachment":[{"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/media?parent=407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/categories?post=407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantusintel.group\/osint\/wp-json\/wp\/v2\/tags?post=407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u2022 Types of malware
\u2022 Common cyber attacks
\u2022 Security testing methods
\u2022 Cybersecurity teams and how they\u00a0work<\/strong><\/p>\nWhat is a\u00a0Virus?<\/h3>\n
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![\"\"](\"https:\/\/cdn-images-1.medium.com\/max\/1024\/1*L9g4tnmLbHSNzKGd_KQt5g.jpeg\")
Types of\u00a0Viruses<\/h3>\n
1. File Infector\u00a0Virus<\/h3>\n
2. Boot Sector\u00a0Virus<\/h3>\n
3. Macro\u00a0Virus<\/h3>\n
4. Polymorphic Virus<\/h3>\n
5. Resident\u00a0Virus<\/h3>\n
What is\u00a0Malware?<\/h3>\n
![\"\"](\"https:\/\/cdn-images-1.medium.com\/max\/1024\/0*slEouD_EnR4N3w73.png\")
Worm<\/h3>\n
Trojan Horse<\/h3>\n
Ransomware<\/h3>\n
Spyware<\/h3>\n
Adware<\/h3>\n
Common Types of Cyber\u00a0Attacks<\/h3>\n
1. Phishing\u00a0Attack<\/h3>\n
2. DDoS\u00a0Attack<\/h3>\n
3. Man-in-the-Middle (MITM)<\/h3>\n
4. SQL Injection<\/h3>\n
5. Password\u00a0Attack<\/h3>\n
Types of Security\u00a0Testing<\/h3>\n
1. Black Box\u00a0Testing<\/h3>\n
✔ Acts like a real hacker
✔ Tests external\u00a0security<\/p>\n2. White Box\u00a0Testing<\/h3>\n
✔ Access to code, structure, and data
✔ Finds deep vulnerabilities<\/p>\n3. Grey Box\u00a0Testing<\/h3>\n
✔ Mix of both black and white box
✔ More realistic testing<\/p>\n![\"\"](\"https:\/\/cdn-images-1.medium.com\/max\/900\/0*iTmyr_sUuUMtW8Ec.jpg\")
Cybersecurity Teams<\/h3>\n
Red Team (Attackers)<\/h3>\n
\u2022 Try to break into systems
\u2022 Think like\u00a0hackers<\/p>\nBlue Team (Defenders)<\/h3>\n
\u2022 Detect and stop attacks
\u2022 Respond to incidents<\/p>\nPurple Team (Collaboration)<\/h3>\n
\u2022 Improves communication
\u2022 Helps fix weaknesses faster<\/p>\n\n
![\"\"](\"https:\/\/cdn-images-1.medium.com\/max\/1007\/0*eS5SomOCnyDi6Ocn.png\")
Conclusion<\/h3>\n
\u2022 What malware is and its types
\u2022 Common cyber attacks
\u2022 Different types of security testing
\u2022 Roles of cybersecurity teams<\/p>\nWhat\u2019s Next?<\/h3>\n
<\/p>\n
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