---
phase: 16-osint-threat-intel-mobile-dns-api-marketplaces
plan: 01
subsystem: recon
tags: [virustotal, intelligencex, urlhaus, threat-intel, osint]

requires:
  - phase: 09-osint-infrastructure
    provides: ReconSource interface, LimiterRegistry, Client, BuildQueries, ciLogKeyPattern
provides:
  - VirusTotalSource implementing ReconSource (credential-gated)
  - IntelligenceXSource implementing ReconSource (credential-gated)
  - URLhausSource implementing ReconSource (credentialless)
affects: [16-osint-wiring, recon-engine-registration]

tech-stack:
  added: []
  patterns: [three-step IX search flow (initiate/results/read), VT x-apikey auth, URLhaus form-encoded POST with tag/payload fallback]

key-files:
  created:
    - pkg/recon/sources/virustotal.go
    - pkg/recon/sources/virustotal_test.go
    - pkg/recon/sources/intelligencex.go
    - pkg/recon/sources/intelligencex_test.go
    - pkg/recon/sources/urlhaus.go
    - pkg/recon/sources/urlhaus_test.go
  modified: []

key-decisions:
  - "VT uses x-apikey header per official API v3 spec"
  - "IX uses three-step flow: POST search, GET results, GET file content per record"
  - "URLhaus tag lookup with payload endpoint fallback for broader coverage"

patterns-established:
  - "Threat intel sources follow same SentrySource pattern with ciLogKeyPattern matching"

requirements-completed: [RECON-INTEL-01, RECON-INTEL-02, RECON-INTEL-03]

duration: 4min
completed: 2026-04-06
---

# Phase 16 Plan 01: Threat Intelligence Sources Summary

**VirusTotal, IntelligenceX, and URLhaus recon sources for detecting API keys in malware samples, breach archives, and malicious URL databases**

## Performance

- **Duration:** 4 min
- **Started:** 2026-04-06T13:43:29Z
- **Completed:** 2026-04-06T13:47:29Z
- **Tasks:** 2
- **Files modified:** 6

## Accomplishments
- VirusTotalSource searches VT Intelligence API for files containing API key patterns (credential-gated, 4 req/min rate limit)
- IntelligenceXSource searches IX archive with three-step search/results/content-read flow (credential-gated)
- URLhausSource searches abuse.ch API for malicious URLs with embedded keys (credentialless, always enabled)
- All three sources use ciLogKeyPattern for consistent content matching across the recon framework

## Task Commits

Each task was committed atomically:

1. **Task 1: VirusTotal and IntelligenceX sources** - `e02bad6` (feat)
2. **Task 2: URLhaus source** - `35fa4ad` (feat)

## Files Created/Modified
- `pkg/recon/sources/virustotal.go` - VT Intelligence API search source
- `pkg/recon/sources/virustotal_test.go` - httptest mocks for VT (4 tests)
- `pkg/recon/sources/intelligencex.go` - IX archive search with three-step flow
- `pkg/recon/sources/intelligencex_test.go` - httptest mocks for IX (4 tests)
- `pkg/recon/sources/urlhaus.go` - abuse.ch URLhaus tag/payload search
- `pkg/recon/sources/urlhaus_test.go` - httptest mocks for URLhaus (4 tests)

## Decisions Made
- VT uses x-apikey header per official API v3 spec
- IX uses three-step flow: POST search initiation, GET results list, GET file content per record
- URLhaus uses tag lookup endpoint with payload endpoint fallback for broader coverage

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Three threat intel sources ready for wiring into RegisterAll
- VT and IX require API keys via config/env; URLhaus works immediately
- All sources follow established ReconSource pattern

---
*Phase: 16-osint-threat-intel-mobile-dns-api-marketplaces*
*Completed: 2026-04-06*
