Angle: The final NYDFS Part 500 updates — expanded MFA and asset-inventory procedures — take effect Nov 1, 2025. Here’s the engineer-first plan to close gaps, generate audit evidence, and prove compliance without derailing releases.
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What changes now (quick recap for engineers)
Universal MFA: Require MFA for any user accessing any information system, with risk-based exceptions documented and CISO-approved.
Asset inventory procedures: Maintain a written procedure and a living inventory with owner, location, classification, support EoL, RTO, and validation cadence.
Class A companies: You already carry extra load (e.g., EDR, centralized logging, PAM, independent audits). Make sure those controls are live and evidenced from earlier 2025 milestones.
The 7 Fast Wins for the Nov 1, 2025, Remediation Sprint
1) Build (or finish) the live asset inventory in hours — not weeks
Start with what you already have (CMDB, cloud APIs, EDR agent lists), normalize, then fill gaps.
CREATE TABLE IF NOT EXISTS assets( asset_id INTEGER PRIMARY KEY, hostname TEXT UNIQUE, owner_email TEXT, env TEXT, location TEXT, classification TEXT, contains_npi INTEGER, rto_hours INTEGER, support_eol_date TEXT, last_validated_at TEXT );
Python normalizer (drop in a container)
import json, sqlite3, glob, time db="inventory.db" conn=sqlite3.connect(db) c=conn.cursor() c.execute("""CREATE TABLE IF NOT EXISTS assets( asset_id INTEGER PRIMARY KEY, hostname TEXT UNIQUE, owner_email TEXT, env TEXT, location TEXT, classification TEXT, contains_npi INTEGER, rto_hours INTEGER, support_eol_date TEXT, last_validated_at TEXT)""")
for f in glob.glob("ingest/*.json"): try: rec=json.load(open(f)) c.execute("""INSERT OR REPLACE INTO assets (asset_id, hostname, owner_email, env, location, classification, contains_npi, rto_hours, support_eol_date, last_validated_at) VALUES ((SELECT asset_id FROM assets WHERE hostname=?), ?,?,?,?,?,?,?,?,?)""", (rec["hostname"], rec["hostname"], rec.get("owner_email",""), rec.get("env","prod"), rec.get("location","cloud"), rec.get("classification","internal"), int(rec.get("contains_npi",0)), int(rec.get("rto_hours",24)), rec.get("support_eol_date",""), time.strftime("%Y-%m-%dT%H:%M:%SZ"))) except Exception as e: print("skip", f, e) conn.commit()
Evidence tip: Export a CSV and take a quick screenshot of inventory filters for NPI-handling systems. Store both in /evidence/500.13/.
2) Enforce universal MFA and document the exceptions
Okta check (Python + Okta API)
import requests, os OKTA_DOMAIN=os.environ["OKTA_DOMAIN"] TOKEN=os.environ["OKTA_API_TOKEN"] r=requests.get(f"https://{OKTA_DOMAIN}/api/v1/users?limit=200", headers={"Authorization": f"SSWS {TOKEN}"}) violators=[] for u in r.json(): # Example: custom profile flag set by your MFA enrollment workflow if not u["profile"].get("mfa_enrolled", False): violators.append((u["profile"]["login"], u["status"])) open("mfa_violators.csv","w").write("user,status\n"+"\n".join(f"{u},{s}" for u,s in violators))
Azure Entra ID (Graph) — check per-user MFA
# Requires: az login; az account set ...; Graph permissions az rest --method GET \ --url "https://graph.microsoft.com/v1.0/reports/credentialUserRegistrationDetails" \ --output json > mfa_registration.json
Exception register (YAML)
mfa_exceptions: - system: "Legacy-FTP-Feed" reason: "Vendor does not support MFA; compensating control: IP allowlist + jump host" ciso_approval_id: "APPROVAL-2025-1101-01" review_due: "2026-01-15"
Evidence tip: Screenshot MFA policy coverage, attach mfa_violators.csv, and include the CISO exception memo PDF in /evidence/500.12/.
Screenshot of the free tools webpage where you can access security assessment tools.
3) If you’re Class A: re-prove EDR coverage + centralized logging
CrowdStrike (sensor coverage by hostname)
# Pseudocode: replace with your API client hosts = [h.strip() for h in open("inventory_hosts.txt")] missing = [] for h in hosts: if not falcon.sensor_installed(h): missing.append(h) open("edr_missing.txt","w").write("\n".join(missing))
Evidence tip: Save EDR policy export, the edr_missing.txt, and a screenshot of the SIEM search returning the smoke test.
4) Standardize a remediation register that examiners love
Schema (SQLite)
CREATE TABLE IF NOT EXISTS remediation( id INTEGER PRIMARY KEY, finding TEXT, control_map TEXT, owner_email TEXT, due_date TEXT, status TEXT, retest_evidence_path TEXT );
ts=$(date +%Y-%m-%d) zip -r "NYDFS-500-evidence-$ts.zip" evidence/
7) Write the one-pager your executives will sign
Copy/paste and tweak:
Title: NYDFS Part 500 — 2025 Final Update Status (Engineering Summary)
Scope: Universal MFA (500.12), Asset Inventory Procedures (500.13), and Class A controls validation. Status: - MFA: [Complete/Partial] - Exceptions documented (CISO approval: [ID]). - Asset Inventory: Procedure approved; inventory last validated [date]; CSV attached. - Class A: EDR coverage [XX%] with gap list attached; centralized logging smoke test passed. Artifacts: See NYDFS-500-evidence-YYYY-MM-DD.zip Certification Impact: Ready for April 15, 2026 annual certification (CY2025) based on controls in place, with remediation due dates tracked in register.
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