An email from some unknown person claiming to be a representative of your bank and asking for your account number and password so that they can fix your account is an example of social engineering called phishing. Phishing is a form of fraud that uses deceptive emails or other messages to trick recipients into revealing sensitive information, such as passwords, credit card numbers, bank account details, etc. Phishing emails often impersonate legitimate organizations or individuals and create a sense of urgency or curiosity to lure the victims into clicking on malicious links, opening malicious attachments or providing personal information. ISO/IEC 27001:2022 requires the organization to implement awareness and training programs to make users aware of the risks of social engineering attacks, such as phishing, and how to avoid them (see clause A.7.2.2). Reference: CQI & IRCA Certified ISO/IEC 27001:2022 Lead Auditor Training Course, ISO/IEC 27001:2022 Information technology - Security techniques - Information security management systems - Requirements, What is Phishing?

Explanation

The correct responsibility with each participant of a second-party audit is:
* Prepares the audit report: Audit Team Leader. The audit team leader is responsible for coordinating the audit activities, communicating with the auditee and the customer, and preparing and delivering the audit report that summarizes the audit findings and conclusions1.
* Prepares audit checklists for use during the audit: Auditor. The auditor is responsible for collecting and verifying objective evidence during the audit, using audit checklists as a tool to guide the audit process and ensure that all relevant aspects of the audit criteria are covered1.
* Supports an auditor and provides feedback on their experience: Auditor in training. The auditor in training is a person who is learning how to perform audits under the supervision of an experienced auditor. The auditor in training supports the auditor by observing and participating in the audit activities, and provides feedback on their experience to improve their skills and competence1.
* Follows-up on audit findings within an agreed timeframe: Auditee. The auditee is the organisation that is being audited by the customer or a third party on behalf of the customer. The auditee is responsible for providing access and cooperation to the auditors, and for following up on the audit findings within an agreed timeframe, by implementing corrective actions or improvement measures as needed1.
* Provides an independent account of the audit but does not participate in the audit: Observer. The observer is a person who accompanies the audit team but does not participate in the audit activities. The observer may be a representative of the customer, a regulatory body, or another interested party. The observer provides an independent account of the audit but does not interfere with or influence the audit process or outcome1.
* Escorts the auditors but does not participate in the audit: Guide. The guide is a person who is appointed by the auditee to assist the audit team during the audit. The guide may escort the auditors to different locations, facilitate access to information and personnel, or provide clarification or explanation as requested by the auditors. The guide does not participate in the audit or influence its results1.

The only option that is not prohibited in acceptable use of information assets is C: company-wide e-mails with supervisor/TL permission. This option implies that the sender has obtained the necessary authorization from their supervisor or team leader to send an e-mail to all employees in the organization. This could be done for legitimate business purposes, such as announcing important news, events or updates that are relevant to everyone. However, this option should still be used sparingly and responsibly, as it could cause unnecessary disruption or annoyance to the recipients if abused or misused. The other options are prohibited in acceptable use of information assets, as they could violate the information security policies and procedures of the organization, as well as waste resources and bandwidth. Electronic chain letters (A) are messages that urge recipients to forward them to multiple other people, often with false or misleading claims or promises. They are considered spam and could contain malicious links or attachments that could compromise information security. E-mail copies to non-essential readers (B) are messages that are sent to recipients who do not need to receive them or have no interest in them. They are considered unnecessary and could clutter the inbox and distract the recipients from more important messages. Messages with very large attachments or to a large number of recipients (D) are messages that consume a lot of network resources and could affect the performance or availability of the information systems. They could also exceed the storage capacity or quota limits of the recipients' mailboxes and cause problems for them. ISO/IEC 27001:2022 requires the organization to implement rules for acceptable use of assets (see clause A.8.1.3). References: CQI & IRCA Certified ISO/IEC 27001:2022 Lead Auditor Training Course, ISO/IEC 27001:2022 Information technology
- Security techniques - Information security management systems - Requirements, What is Acceptable Use?

The type of threat that occurs when someone from a large tech company calls you on behalf of your company to check the health of your PC, and therefore needs your user-id and password, is a social engineering threat. Social engineering is a technique that manipulates people into revealing confidential or sensitive information, such as passwords, personal data, bank details, etc., by impersonating someone trustworthy or authoritative, such as an IT support staff, a manager, a colleague, etc. Social engineering can be done through various channels, such as phone calls, emails, text messages, etc., and can exploit human emotions, such as curiosity, fear, greed or sympathy. Social engineering is often used by hackers or cybercriminals to gain unauthorized access to information systems or networks, or to perform malicious or fraudulent activities. Reference: [CQI & IRCA Certified ISO/IEC 27001:2022 Lead Auditor Training Course], ISO/IEC 27001:2022 Information technology - Security techniques - Information security management systems - Requirements, What is Social Engineering?