Malicious code

As explained in AI for Everyday IT

Malware is software intentionally designed to damage systems, disrupt operations, or gain unauthorized access to data or resources.

Malicious code is software intentionally designed to damage systems, disrupt operations, or gain unauthorized access to data or resources. Email is a common route for spreading malware, often through phishing. section 7.1.3

Treat suspicious messages as possible entry points for malicious code:

• Be cautious when an unexpected message asks you to click a link or provide sensitive information. section 7.1.3
• Inspect the email’s source text and headers, even when the visible message appears legitimate. section 7.1.3
• Use AI to identify phishing indicators, but verify the result before acting. section 7.1.3

Analyzing a suspicious email

Copy the email’s source text and headers into an AI service and ask whether the message is a phishing attempt. The analysis can identify failures in SPF and DKIM authentication protocols. section 7.1.3

Figure 7.2 Finding the source text and headers of an email in Outlook for Mac and PC

Shows where to find email source text and headers in Outlook for Mac and PC. section 7.1.3

Figure 7.3 M365 Copilot analysis of email source text

Shows M365 Copilot analyzing pasted email source text for phishing signs. section 7.1.3

How AI for Everyday IT covers it

How deep it goes

Defines malicious code briefly, then demonstrates phishing analysis through email headers, source text, and authentication failures.

Examples

Uses suspicious emails, Outlook headers, pasted source text, M365 Copilot, SPF failures, and DKIM failures.

What it assumes

Assumes access to an email client and AI service while teaching source-text inspection without requiring header expertise.

What you can do after

Diagnose suspicious emails by examining headers and source text with an AI service before opening links or sharing information.

How it connects

Connects malicious code with malware, phishing, email security, SPF, DKIM, and unauthorized access.

liveBookmanning.com

Read AI for Everyday IT on liveBook Get the book at manning.com

Also explained in

• 

  liveBookmanning.com
  Acing the CCNA Exam: Volume 2 Advanced Networking and SecurityMalware is software designed to perform malicious actions or compromise the confidentiality, integrity, or availability of systems or data.
• 

  liveBookmanning.com
  Grokking Web Application SecurityMalicious code is program code intended to perform unauthorized, harmful, or security-compromising actions.

Compare how 3 books explain malicious code →

Related concepts

• ransomwareincludes · Ransomware is malicious software or a cyberattack that restricts access to data or systems, typically to extort payment or another concession.
• file uploadused by · A file upload is the transfer of a file from a client or user device to a software system over a network for storage, processing, or analysis.
• Trojan horseincludes · A Trojan horse is malicious software that appears legitimate while concealing functions that compromise security or exploit the user's authorization.
• threat landscapepart of · A threat landscape is the set of threats, adversaries, attack methods, vulnerabilities, and evolving risks relevant to an organization or environment.

This explainer was generated by Manning's knowledge graph from the text of AI for Everyday IT. The section links point to the parts of the book it draws on.