ASM 侦察资产归属甄别

⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.

Mandatory confirmation gate Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:

1. Ask the user to state the exact target URL, IP, account, or resource.
2. Ask the user to confirm written authorization and the permitted scope.
3. Show the exact command(s) and explain their expected effect.
4. Wait for explicit confirmation in the current conversation.

Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

When to use this skill

Trigger when:

• The target brand is a common/dictionary word or shared term (e.g. apex, summit, vertex, nova, core, orbit, pulse, unity…)
• You receive an ASM report, recon export, breach combo, repo list, bucket list, or mobile-app list to act on
• A "Critical" count looks implausibly high (hundreds) for the org's size
• Any asset's ownership is asserted by the tool but not proven

The two failure modes this skill prevents:

1. Wasting the engagement testing/triaging assets that aren't the target's.
2. Attacking an innocent third party that merely shares the name — out of scope, and real harm.

Rule: ownership is guilty-until-proven. An asset is the target's only when a concrete ownership signal ties it to the target — never because a scanner's keyword matched.

The collision sources (where keyword-matching lies)

Web "Critical" triage — the soft-404 control

Automated .env / .git / actuator / admin-panel "Criticals" are overwhelmingly soft-404s: SPA/framework catch-alls returning HTTP 200 (or 403) for every path. Verify EACH before believing it:

# the "finding"
curl -s -o /tmp/a -w "%{http_code} %{size_download}\n" https://host.target.com/.env
# a junk control on the same host
curl -s -o /tmp/b -w "%{http_code} %{size_download}\n" https://host.target.com/zzz-nonsense-$RANDOM
# identical byte length / body  →  FALSE POSITIVE (catch-all), discard
cmp -s /tmp/a /tmp/b && echo "SOFT-404 false positive" || echo "differs — investigate"

Real exposures have a content-type + signature that differs from the catch-all (.git/config starts [core]; .env has KEY=value; phpinfo has the XHTML-transitional doctype + PHP Version). A physical .php/phpinfo.php that returns a bigger/different body than the junk control is the real-vs-soft-404 tell.

The triage workflow

1. Confirm the canonical owned-domain set first (the SOW/program domain + its verified subdomains + the verified Entra/Okta/Google tenant brand name). This is your ownership anchor.
2. For each asset class, apply the verify-by column above. No signal → quarantine, don't test.
3. Re-baseline the severity counts against only-owned assets. Report the delta — "N Criticals → M after ownership + soft-404 triage" is itself a finding about the ASM program.
4. Quarantine collisions explicitly (a loot/quarantined_<source>.txt) so it's auditable that you saw them and chose not to target them.
5. Surface the meta-finding: if the supplied ASM/recon feed is mostly false-positive, that misallocates the owner's remediation budget and buries real risk — write it up (Medium/Strategic).

Anti-patterns

• Trusting the tool's "owned" label. Tools keyword-match; they don't prove ownership. Verify.
• Targeting a same-named third party because it was "in the report." Out of scope + real harm. A combo line user@<word>company.com is a different company's employee.
• Reporting soft-404s as exposures. Always run the junk-path control.
• Counting typosquats / missing-headers / brand-collision repos as offensive findings. They're defensive/hygiene/noise — they pad the report and erode credibility.
• Skipping triage "to save time." Untriaged, you spend the whole engagement on other people's assets and find nothing real.

Why this matters (calibration)

For a target whose brand is a common word, expect the bulk of automated "owned" assets to be collisions:

• Repos that are unrelated open-source projects (ad-block lists, scrapers, student projects, a different company's SDK) merely containing the word.
• Mobile apps published by entirely different companies that share the name — banks, credit unions, dating apps, dispensaries, home-care services are all real-world collision categories. (Good ASM tooling will tell you it accepted zero as owned.)
• Cloud buckets in the global namespace holding some unrelated org's content (other-language documents, demo/sample data, another industry's files).
• Breach combos full of emails from sibling-named-but-different companies (<word>group.com, <region><word>.com).

On a real engagement against a dictionary-word brand, after clearing this noise the only genuinely-owned high-severity finding was discoverable solely by manual tradecraft (a JS-bundle → API discovery, see hunt-spa-api) — it was nowhere in the hundreds of scanner "Criticals." Triage-first is what made the engagement productive instead of a goose chase.

Related Skills & Chains

• triage-validation — asset-ownership triage (this skill) precedes finding-validity triage (the 7-Question Gate). Ownership first, then validity.
• redteam-mindset — "aggressive default" means probe every owned live surface; this skill defines which surfaces are owned so persistence isn't wasted on collisions.
• hunt-spa-api — once an API host passes ownership triage, this is how you test it.
• offensive-osint / osint-methodology — feed ownership anchors (verified domains, tenant brand, dev accounts) from OSINT into this triage.

Limitations

• Authorized scope only: the confirmation gate above is mandatory before any probing, exploitation, or credential-access command.
• Docs-only import: upstream helper scripts, commands, engine, and research assets are not bundled; reinstall tooling from the source repo when needed.
• Validate every finding (see triage-validation) before reporting; report via report-writing. Prefer a sandbox, disposable VM, or controlled lab.

Example

# Read-only first step; confirm scope before anything active.
cat scope.txt  # target list from the authorized engagement brief

Adapted from elementalsouls/Claude-BugHunter (MIT); frontmatter, When to Use/Limitations, and safety boundaries added for upstream compliance. Docs-only import: executable helpers, commands, engine, and research assets not bundled.