Performing Purple Team Exercise

Performing Purple Team Exercise

Overview

Cybersecurity skill for performing purple team exercise. Follows industry best practices and security standards.

When to Use

Trigger phrases:

• "performing purple team exercise"
• "SOC teams need to validate that detection rules actually fire for the threats th"
• "Red team assessments produced findings that need translation into detection impr"
• "New detection tools or SIEM migrations require validation of detection coverage"

Use this skill when:

• SOC teams need to validate that detection rules actually fire for the threats they target
• Red team assessments produced findings that need translation into detection improvements
• New detection tools or SIEM migrations require validation of detection coverage
• Analyst training requires hands-on experience with real attack techniques and SIEM responses
• Quarterly or semi-annual detection validation cycles are scheduled

Do not use for unannounced red team engagements — purple team exercises require explicit coordination between offensive and defensive teams with real-time collaboration.

When NOT to Use

• When you lack proper authorization for testing
• For production systems without change management
• When the task requires legal or compliance expertise beyond technical scope

Prerequisites

• Red team capability: internal team or contracted purple team operator
• Attack simulation tools: Atomic Red Team, MITRE Caldera, or C2 framework (authorized)
• SIEM access for real-time alert monitoring during exercise
• ATT&CK-mapped detection rule inventory with expected alert names
• Isolated test environment or approved production scope with change management approval
• Communication channel (Slack/Teams) for real-time red-blue coordination

Workflow

# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}

1. Plan Operations — Define objectives, scope, and success criteria for purple team exercise operations.
2. Prepare Environment — Set up tools, access, and data sources required for purple team exercise.
3. Execute Core Workflow — Perform the purple team exercise operations following established procedures.
4. Validate Results — Verify that results meet quality standards and objectives.
5. Report Findings — Document results, observations, and recommendations.
6. Follow Up — Track remediation actions and verify fixes where applicable.

Tools

• Analysis Platform — Data processing and visualization
• Collaboration Tools — Team coordination and knowledge sharing

Process

1. Design — Define interface, identify patterns, plan implementation
2. Implement — Write code following existing conventions, add tests
3. Verify — Run tests, check integration, validate behavior

Verification

• All purple team exercise procedures executed completely and documented
• Findings validated against multiple data sources
• False positives identified and filtered
• Results documented with evidence and timestamps
• Recommendations provided with risk-based prioritization

Anti-Rationalization Table