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mukul975
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Complete skill folder anatomy across all cybersecurity skills: - scripts/agent.py: 80-150 line Python agents using real libraries (impacket, boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.) - references/api-reference.md: real API documentation with method signatures - LICENSE: MIT license for all skill folders
56 lines
2.1 KiB
Markdown
56 lines
2.1 KiB
Markdown
# API Reference: Implementing SIEM Use Cases for Detection
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## Libraries
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### attackcti (MITRE ATT&CK)
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- **Install**: `pip install attackcti`
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- `attack_client()` -- Initialize ATT&CK data client
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- `get_techniques()` -- All techniques for coverage calculation
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- `get_groups()` -- Threat groups for threat-informed use cases
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### splunk-sdk (Splunk Integration)
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- **Install**: `pip install splunk-sdk`
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- `splunklib.client.connect()` -- Connect to Splunk instance
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- `service.jobs.create(query)` -- Execute detection rule SPL
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## Use Case Lifecycle
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| Phase | Activities |
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|-------|-----------|
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| Design | Map to ATT&CK, define data sources, write detection logic |
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| Test | Validate with Atomic Red Team, measure FP/TP rates |
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| Deploy | Push to SIEM with alerting and SLA configuration |
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| Tune | Refine based on FP feedback, add exclusions |
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| Retire | Deprecate when superseded or no longer relevant |
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## Key ATT&CK Techniques for Use Cases
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| ID | Name | Tactic |
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|----|------|--------|
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| T1110 | Brute Force | Credential Access |
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| T1021.002 | SMB/Windows Admin Shares | Lateral Movement |
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| T1059.001 | PowerShell | Execution |
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| T1048.003 | Exfiltration over DNS | Exfiltration |
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| T1003.001 | LSASS Memory | Credential Access |
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| T1098 | Account Manipulation | Persistence |
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| T1486 | Data Encrypted for Impact | Impact |
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## Sigma Rule Format
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- **Spec**: https://sigmahq.io/docs/basics/rules.html
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- Fields: `title`, `logsource`, `detection`, `level`, `tags`
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- Tools: `sigma-cli` for converting to Splunk SPL, Elastic EQL, Sentinel KQL
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- Repository: https://github.com/SigmaHQ/sigma
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## Detection Quality Metrics
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- True Positive Rate: Target >70%
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- False Positive Rate: Target <30%
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- Mean Time to Detect (MTTD): Varies by severity
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- Coverage: Percentage of ATT&CK techniques with detections
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## External References
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- ATT&CK Techniques: https://attack.mitre.org/techniques/enterprise/
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- Sigma Rules: https://github.com/SigmaHQ/sigma
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- Atomic Red Team: https://github.com/redcanaryco/atomic-red-team
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- Splunk ES Detections: https://research.splunk.com/detections/
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- Elastic Detection Rules: https://github.com/elastic/detection-rules
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