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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
61 lines
2.2 KiB
Markdown
61 lines
2.2 KiB
Markdown
# API Reference: STIX/TAXII Feed Processing Agent
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## Overview
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Discovers TAXII 2.1 servers, fetches STIX 2.1 bundles with pagination, parses and validates objects by type, extracts IOCs from indicator patterns, and builds relationship graphs.
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## Dependencies
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| Package | Version | Purpose |
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|---------|---------|---------|
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| taxii2-client | >= 2.3 | TAXII 2.1 server discovery and collection fetching |
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| stix2 | >= 3.0 | STIX 2.1 object parsing and validation |
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## Core Functions
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### `discover_server(taxii_url, user, password)`
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Discovers TAXII server API roots and their collections.
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- **Returns**: `dict` with `api_roots` containing collection metadata
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### `fetch_collection(taxii_url, collection_id, user, password, added_after, limit)`
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Fetches all STIX objects from a collection with pagination via `as_pages`.
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- **Parameters**: `added_after` (str) - ISO timestamp for incremental fetch
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- **Returns**: `dict` with `total_objects` and `objects` list
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### `parse_stix_bundle(bundle_data)`
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Parses and categorizes STIX objects: indicators, malware, threat-actors, attack-patterns, campaigns, relationships, identities.
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- **Returns**: `dict` with `categories` and `parse_errors`
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### `extract_iocs(parsed_bundle)`
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Extracts actionable IOCs from STIX indicator patterns using regex.
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- **IOC types**: IPv4, IPv6, domain, URL, MD5, SHA-1, SHA-256, email
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- **Returns**: `dict[str, list[str]]` - deduplicated IOC lists
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### `build_relationship_graph(parsed_bundle)`
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Maps STIX relationship objects into a graph of source -> [{relationship, target}].
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- **Returns**: `dict[str, list[dict]]`
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## STIX Object Types Handled
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| Type | Fields Extracted |
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|------|-----------------|
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| indicator | id, name, pattern, pattern_type, valid_from, labels |
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| malware | id, name, is_family, malware_types |
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| threat-actor | id, name, threat_actor_types, aliases |
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| attack-pattern | id, name, external_references (ATT&CK IDs) |
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| campaign | id, name, first_seen |
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| relationship | id, relationship_type, source_ref, target_ref |
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## Environment Variables
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| Variable | Required | Description |
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|----------|----------|-------------|
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| `TAXII_USER` | No | TAXII server username |
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| `TAXII_PASSWORD` | No | TAXII server password |
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## Usage
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```bash
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python agent.py https://cti.example.com/taxii/
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```
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