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43 lines
2.3 KiB
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43 lines
2.3 KiB
Markdown
# Standards and Framework References - Incident Triage
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## NIST SP 800-61 Rev. 3 - Incident Triage Alignment
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- **Detect (DE)**: Alert analysis and triage
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- DE.AE-02: Potentially adverse events are analyzed to better understand associated activities
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- DE.AE-03: Information is correlated from multiple sources
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- DE.AE-04: The estimated impact and scope of adverse events is understood
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- **Respond (RS)**: Incident classification and escalation
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- RS.AN-03: Analysis performed to establish awareness of incident scope
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- RS.CO-02: Incidents reported consistent with established criteria
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## SANS PICERL - Identification Phase
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- Phase 2 focuses on detecting and validating security events
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- Triage determines if an event qualifies as an incident
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- Key activities: alert validation, initial scoping, severity assignment
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- Triage SLAs: P1 <15 min, P2 <30 min, P3 <1 hour, P4 <4 hours
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## NIST Severity Classification (SP 800-61 Rev. 2, Table 3-2)
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| Category | Definition | Examples |
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|----------|-----------|----------|
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| CAT 1 - Unauthorized Access | Individual gains access without permission | Compromised credentials, privilege escalation |
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| CAT 2 - Denial of Service | Disruption of service availability | DDoS, resource exhaustion |
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| CAT 3 - Malicious Code | Infection by malware | Virus, worm, trojan, ransomware |
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| CAT 4 - Improper Usage | Violation of acceptable use policy | Unauthorized software, policy breach |
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| CAT 5 - Scans/Probes | Reconnaissance activity | Port scans, vulnerability scans |
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| CAT 6 - Investigation | Unconfirmed suspicious activity | Anomalous behavior under review |
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## MITRE ATT&CK - Triage Technique Mapping
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- Map observed techniques to ATT&CK framework during triage
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- Technique identification helps select appropriate playbook
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- Tactic identification reveals attacker's current phase
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- Reference: https://attack.mitre.org/
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## FIRST CSIRT Services Framework
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- Triage falls under "Event Management" service area
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- Key functions: Monitoring and Detection, Event Analysis, Incident Coordination
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- Reference: https://www.first.org/standards/frameworks/csirts/csirt_services_framework_v2.1
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## US-CERT Federal Incident Reporting Guidelines
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- Category definitions for federal incident reporting
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- Reporting timeframes based on incident category
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- Reference: https://www.cisa.gov/federal-incident-notification-guidelines
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