The technical impact of this incident would be categorized as an integrity breach in reference to the Top Threats Analysis methodology. The Top Threats Analysis methodology is a process developed by the Cloud Security Alliance (CSA) to help organizations identify, analyze, and mitigate the top threats to cloud computing, as defined in the CSA Top Threats reports. The methodology consists of six steps: scope definition, threat identification, technical impact identification, business impact identification, risk assessment, and risk treatment. Each of these provides different insights and visibility into the organization's security posture.1 The technical impact identification step involves determining the impact on confidentiality, integrity, and availability of the information system caused by each threat. Confidentiality refers to the protection of data from unauthorized access or disclosure. Integrity refers to the protection of data from unauthorized modification or deletion. Availability refers to the protection of data and services from disruption or denial.2 An integrity breach occurs when a threat compromises the accuracy and consistency of the data or system. An integrity breach can result in data corruption, falsification, or manipulation, which can affect the reliability and trustworthiness of the data or system. An integrity breach can also have serious consequences for the business operations and decisions that depend on the data or system.3 In this case, the cybersecurity criminal was able to access an encrypted file system and overwrite parts of some files with random data. This means that the data in those files was altered without authorization and became unusable or invalid. This is a clear example of an integrity breach, as it violated the principle of ensuring that data is accurate and consistent throughout its lifecycle.4 References := CCAK Study Guide, Chapter 4: A Threat Analysis Methodology for Cloud Using CCM, page
811; What is CIA Triad? Definition and Examples2; Data Integrity vs Data Security: What's The Difference?
3; Data Integrity: Definition & Examples

Using a standardized control framework enables auditors to conduct gap analyses of what a cloud service provider (CSP) offers versus what the customer requires. A standardized control framework is a set of guidelines, best practices, and criteria that help to evaluate and improve the security, privacy, and compliance of cloud computing environments. Examples of standardized control frameworks include ISO/IEC 27001
/27002/27017/27018, NIST SP 800-53, CSA Cloud Controls Matrix (CCM), COBIT, etc. By using a standardized control framework, auditors can compare the CSP's policies, procedures, and practices with the customer's expectations and requirements, and identify any gaps or discrepancies that may pose risks or issues. A gap analysis can help the auditors to provide recommendations and suggestions to the CSP and the customer on how to close the gaps and enhance the quality and performance of the cloud services12.
References:
* Cloud Controls Matrix (CCM) - CSA
* Cloud Computing Audit Program - ISACA

A DDoS attack renders the customer's cloud inaccessible for 24 hours, resulting in millions in lost sales is an example of financial business impact. Financial business impact refers to the extent of damage or harm that a threat can cause to the financial objectives and performance of the organization, such as revenue, profit, cash flow, or market share. A DDoS attack can cause a significant financial business impact by disrupting the normal operations and transactions of the organization, leading to loss of sales, customers, contracts, or opportunities. According to a report by Kaspersky, the average cost of a DDoS attack for small and medium- sized businesses (SMBs) was $123,000 in 2019, while for enterprises it was $2.3 million.1 Therefore, it is important for organizations to implement appropriate security measures and contingency plans to prevent or mitigate the effects of a DDoS attack. References := The Future of Finance and the Global Economy: Facing Global ... - IMF2; Kaspersky: Cost of a DDoS Attack1

The Cloud Controls Matrix (CCM) is a cybersecurity control framework specifically designed for cloud computing environments. A key benefit of using the CCM is that it maps to existing security standards, best practices, and regulations. This mapping allows organizations to ensure that their cloud security posture aligns with industry-recognized frameworks, thereby facilitating compliance and security assurance efforts. The CCM's comprehensive set of control objectives covers all key aspects of cloud technology and provides guidance on which security controls should be implemented by various actors within the cloud supply chain.
References = This answer is supported by the information provided in the Cloud Controls Matrix documentation and related resources, which highlight the CCM's alignment with other security standards and its role in helping organizations navigate the complex landscape of cloud security and compliance12.