A curated awesome-list from redhuntlabs that catalogs resources for the asset discovery phase of authorized security assessments, spanning subdomain enumeration, OSINT, cloud storage, and data leak monitoring.
| Tool | redhuntlabs/Awesome-Asset-Discovery — a curated list of asset discovery and attack surface reconnaissance resources |
| Category | OSINT / reconnaissance resource catalog (awesome-list) |
| Primary Use | Building a complete inventory of an organization's external assets — domains, subdomains, IPs, cloud storage, code repositories, and leaks — during authorized assessments |
| Safe Use | For penetration testers, bug bounty researchers, and defenders performing asset discovery exclusively on organizations that have authorized the assessment in writing; equally useful for blue teams inventorying their own attack surface |
| Telemetry Note | This is a static link catalog, not software; it generates no telemetry itself. However, the individual tools it references — masscan, Zmap, gobuster — produce characteristic scan traffic and DNS query patterns that defenders can detect and attribute |
Awesome-Asset-Discovery is not a tool in the traditional sense but a curated repository from redhuntlabs that has become one of the standard reference points for the asset discovery phase of security work. With nearly 2,900 stars and a CC0-1.0 license, it functions as a map of the reconnaissance landscape, organizing resources into thirteen categories that mirror how an experienced operator actually sequences an engagement. The README opens with an argument worth internalizing: asset discovery is the initial phase of any security assessment, offensive or defensive, and the definition of an asset has expanded well beyond servers and workstations to include anything an organization's data touches — knowingly or unknowingly.
That framing is the repository's real contribution. The maintainers argue that if an organization publishes open source code on GitHub, it does not own GitHub, but it does own the data in those repositories. A leaked secret in a company GitHub account can pose a threat equal to or greater than a vulnerable service running on an exposed host. This is the modern attack surface perspective — the reason attack surface management (ASM) has grown into its own product category — and the list is effectively a practitioner's toolkit for enumerating that expanded surface. The README links to a companion redhuntlabs blog post, "Redefining Assets: A Modern Perspective," that develops the argument in more depth.
Structurally, the catalog covers the full vertical of external reconnaissance. The Domain / Subdomain Discovery section is the densest, listing subfinder (described as a passive framework safe for penetration testing), OWASP Amass, Sublist3r, aiodnsbrute for asynchronous DNS brute forcing, and a cluster of certificate transparency tooling — ct-exposer, CertGraph, and SSLScrape — that mine CT logs and certificate alternate names for hostnames that DNS queries alone will miss. There are also NSEC3-walking utilities like nsec3map and the nmap dns-nsec3-enum NSE script, which exploit DNSSEC zone walking on misconfigured zones, a technique that is only viable against name servers that leak their record set.
The IP Address Discovery and Network / Port Scanning sections cover the infrastructure layer. Bulk lookup services like Mxtoolbox and ViewDNS sit alongside ASN-oriented resources — BGPView and the Hurricane Electric BGP toolkit — that let you pivot from a known IP to the announcing autonomous system and from there to adjacent ranges owned by the same organization. For active scanning, the list catalogs masscan, Zmap, ZMapv6 for IPv6 surveys, and Nmap, which the README correctly calls the most popular port scanner in existence. The distinction matters in practice: internet-wide survey scanners like Zmap are for breadth, while Nmap service and script scanning is for depth on confirmed in-scope targets.
What makes the list more interesting than a generic tool dump is its coverage of categories that narrower lists ignore. Business Communication Infrastructure Discovery includes Mxtoolbox for mail exchanger records, MicroBurst (NetSPI's PowerShell-based Azure assessment scripts), lyncsmash for self-hosted Lync/Skype for Business, and ruler for interacting with Exchange services. Cloud Infrastructure Discovery catalogs CloudScraper for spidering websites referencing S3 buckets, Azure blobs, and DigitalOcean storage, plus GCPBucketBrute, inSp3ctor, and CloudStorageFinder for locating publicly accessible cloud storage — a category of exposure that repeatedly produces real incidents because permissions drift over time.
The Source Code Aggregators section addresses the GitHub-leak threat model the README opens with. Gitrob performs reconnaissance against GitHub organizations looking for sensitive files, GitHub Advanced Search is listed as a first-class resource, and publicwww offers source-code search across web pages. Alongside this, Data Leaks covers paste-site monitoring with Dumpmon, pastebin_scraper, Scavenger, and Pwnbin — crawlers that watch paste sites for leaked credentials. These tools straddle the line between legitimate exposure monitoring and opportunistic credential harvesting, and the authorized-professional framing is what separates one from the other.
The people-and-companies angle is covered too. Company Information and Associations lists corporate registries like OpenCorporates, Companies House, and Crunchbase, useful for mapping subsidiaries and acquisitions that expand the in-scope asset set. Social Media / Employee Profiling references LinkedInt and linkedin2username for generating username lists from LinkedIn — a classic precursor to password spraying and phishing simulations in authorized engagements, and a category defenders should study for the same reason. Internet Survey Data rounds things out with Project Sonar forward and reverse DNS datasets, scans.io, and redhuntlabs' own Project Resonance, providing historical scan data without touching the target at all.
For defenders, this repository is arguably more valuable read as a threat model than as a toolkit. Every category describes a capability your adversaries possess, and the passive-first ordering of the list — certificate transparency, DNS datasets, survey archives, corporate registries — is precisely the workflow an external attacker uses before sending a single packet. Building detection and exposure-management programs that assume this enumeration has already happened (because with CT logs and Project Sonar, much of it is public record) is the correct defensive posture. Shadow-asset discovery, third-party SaaS identification, and cloud bucket auditing map directly onto the list's categories.
A few caveats are worth noting. The repository is a list of links, and like all awesome-lists it inevitably carries some rot: several referenced projects have been archived or superseded, and the kitploit listing surfaces it periodically, which suggests ongoing community attention if uneven maintenance. The README also promotes redhuntlabs' commercial NVADR attack surface management platform and their Attack Surface Recon API, described as backed by a database of over six billion records — so readers should treat the list as partly educational and partly vendor content, evaluating each linked tool on its own merits.
For an operator assembling a methodology, the practical value is the taxonomy itself. Even if you replace individual entries with newer tools, the thirteen-category structure — content, IP, domain, email, network, communications infrastructure, source code, cloud, corporate associations, survey data, people, leaks, archives — is a defensible checklist for scoping an authorized external assessment. Clone it with git clone https://github.com/redhuntlabs/Awesome-Asset-Discovery and it serves as a living index to diff against your current toolchain. Used within scope and with authorization, it is one of the better single-page summaries of what modern attack surface reconnaissance actually entails.
redhuntlabs/Awesome-Asset-Discovery.Educational analysis for authorized security professionals. Use only in controlled, authorized environments.
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