Level 5 CMMC - CMMC Practices

AU.3.052  

Reference: CMMC 1.02

Family: AU

Level Introduced: 3

Practice:
Provide audit record reduction and report generation to support on-demand analysis and reporting.

CMMC Clarification:
Raw audit log data is difficult to review, analyze, and report because of the volume of data. Audit record reduction is an automated process that interprets raw audit log data and extracts meaningful and relevant information without altering the original logs. An example of log reduction for files to be analyzed would be the removal of details associated with nightly backups. Report generation on reduced log information allows you to create succinct customized reports without the need to burden the reader with unimportant information. In addition, the security relevant audit information must be made available to personnel on- demand for immediate review, analysis, reporting, and event investigation support. Peforming audit log reduction and providing on-demand reports may allow the analyst to take mitigating action before the adversary completes their malicious actions.

Example
You are in charge of IT operations in your organization. You are responsible for providing audit record reduction and report generation capability to effectively extract security relevant information. You either purchase or develop a capability that will collect and analyze data for signs of anomalies. The system then extracts security relevant data to provide a reduced, concise, and comprehensive view for further analysis to identify potentially malicious activity on your network. In addition to creating on-demand data sets for analysis, you create customized reports explaining the contents of the data set.

3.3.6

Provide audit record reduction and report generation to support on-demand analysis and reporting.

Discussion:
Audit record reduction is a process that manipulates collected audit information and organizes such information in a summary format that is more meaningful to analysts. Audit record reduction and report generation capabilities do not always emanate from the same system or organizational entities conducting auditing activities. Audit record reduction capability can include, for example, modern data mining techniques with advanced data filters to identify anomalous behavior in audit records. The report generation capability provided by the system can help generate customizable reports. Time ordering of audit records can be a significant issue if the granularity of the time stamp in the record is insufficient.

Source: NIST Special Publication 800-171 Rev. 2

AU-7

AUDIT REDUCTION AND REPORT GENERATION

Description:
The information system provides an audit reduction and report generation capability that:
    a. Supports on-demand audit review, analysis, and reporting requirements and after-the-fact investigations of security incidents; and
    b. Does not alter the original content or time ordering of audit records.

Supplemental Guidance:
Audit reduction is a process that manipulates collected audit information and organizes such information in a summary format that is more meaningful to analysts. Audit reduction and report generation capabilities do not always emanate from the same information system or from the same organizational entities conducting auditing activities. Audit reduction capability can include, for example, modern data mining techniques with advanced data filters to identify anomalous behavior in audit records. The report generation capability provided by the information system can generate customizable reports. Time ordering of audit records can be a significant issue if the granularity of the timestamp in the record is insufficient. Related control: AU-6.

Source: NIST Special Publication 800-53 Rev. 4

Source: CMMC v1.02