IR-4(13)_behavior-analysis

DevOps & Security

Analyze anomalous or suspected adversarial behavior in or related to [organization-defined].

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/NIST/SP800-53_rev5/IR_incident-response/IR-4(13)_behavior-analysis/SKILL.md

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IR-4(13) Behavior Analysis

Enhancement of: IR-4

High-Level Description

Family: Incident Response (IR) Framework: NIST SP 800-53 Rev 5

If the organization maintains a deception environment, an analysis of behaviors in that environment, including resources targeted by the adversary and timing of the incident or event, can provide insight into adversarial tactics, techniques, and procedures. External to a deception environment, the analysis of anomalous adversarial behavior (e.g., changes in system performance or usage patterns) or suspected behavior (e.g., changes in searches for the location of specific resources) can give the organization such insight.

What to Check

Verify IR-4(13) Behavior Analysis is documented in SSP
Confirm control is operating effectively
Review evidence of continuous monitoring for IR-4(13)
Verify enhancement builds upon base control IR-4

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for IR-4(13) implementation details. Verify the organization has documented how this control is satisfied.

Step 2: Validate Implementation

# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly

# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null

Step 3: Test Operating Effectiveness

Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.

Tools

Tool	Purpose	Usage
Manual Review	Documentation and interview-based	N/A

Remediation Guide

Control Statement

Analyze anomalous or suspected adversarial behavior in or related to [organization-defined].

Implementation Guidance

Risk Assessment

Finding	Severity	Impact
IR-4(13) Behavior Analysis not implemented	Medium	Incident Response
IR-4(13) partially implemented	Low	Incomplete Incident Response

CWE Categories

CWE ID	Title
N/A	No direct CWE mapping

References

Checklist

Control documented in SSP
Implementation evidence collected
Operating effectiveness validated
Continuous monitoring in place
Related controls (none) reviewed