It started with a single email.

The subject line seemed legit. The sender looked familiar. The finance team clicked — and within minutes, every file on the server was locked. A ransom note popped up, demanding 12 BTC. Operations came to a standstill. Clients panicked. And just like that, the business lost ₹20 lakhs — and its reputation.

 

Sounds dramatic? Unfortunately, it’s not.

This was a real ransomware attack that hit a mid-sized Mumbai-based logistics company in late 2024. The worst part? It could’ve been prevented with a few basic security practices.

 

Cyber threats aren’t just targeting big names anymore. In 2025, startups, SMEs, hospitals, schools — everyone’s on the hit list. And if your team still thinks "123456" is a password… you're already compromised.

 

Let The Pioneers In Cyber Security: ISACA, Mumbai Chapter Help You Fix That.

 

Here’s a no-fluff, field-tested Cybersecurity Checklist for 2025 — built for real businesses, not just IT pros.

 

1. Zero Trust Isn’t Optional Anymore

In 2025, assuming anything inside your network is safe is reckless.

Go Zero Trust:

a. Every user, device, and app must be verified — always.
b. Enable multi-factor authentication (MFA) everywhere.
c. Restrict access based on job roles — not convenience.

 

2. Phishing Isn’t Old-School — It’s Evolved

Fake emails aren’t obvious anymore. They look like invoices, job offers, even WhatsApp messages.

Checklist must-haves:

a. Run monthly phishing simulation tests.
b. Train employees to “think before they click.”
c. Use email security tools to scan attachments and links.

Did You Know?: Over 91% of cyberattacks still start with a phishing email. One wrong click can cost you crores. Information Source

 

3. Patch. Update. Repeat.

Unpatched software is a hacker’s playground.

If you’re using outdated tools because "they still work fine," you're inviting trouble.

What to do:

a. Set up auto-updates for all software.
b. Patch third-party apps — not just operating systems.
c. Audit every device monthly.

Pro tip: Don’t ignore firmware updates on routers and printers. Attackers love neglected entry points.

 

4. Encrypt Everything — Yes, Everything

Whether it’s client data, payment info, or internal reports — if it lives online, it needs to be encrypted.

Encrypting Checklist:

a. Use HTTPS across all websites and tools.
b. Encrypt internal files and backups.
c. Use end-to-end encrypted communication platforms.

Remember: Backups must be encrypted and stored offline — especially from ransomware.

 

5. Backups Should Be Untouchable

A backup that lives on the same system isn’t a backup.

Smart Backup Strategy (3–2–1 Rule):

a. 3 total copies
b. 2 different mediums
c. 1 kept offline

 

6. Audit Access. Then Audit It Again.

Who has access to what? And why?

Do this:

a. Revoke access for ex-employees immediately
b. Review permissions monthly
c. Monitor admin logins and file downloads

Access hygiene is the most underrated part of cybersecurity.

 

7. Cyber Insurance Isn’t a Luxury Anymore

Even with the best systems, breaches can still happen. Cyber insurance helps cover legal, financial, and recovery costs. In some cases, it’s the only reason a business survives post-attack.

 

How ISACA: Mumbai Chapter Can Help Your Business?

 

You don’t need to be a tech genius to protect your business. You just need a mindset shift — from “We’ll handle it when it happens” to “We’re ready before it does.” In 2025 hackers are thinking beyond the box and hence we will have to be proactive in our protective measures. Miss a step, and the consequences aren’t just digital — they’re deeply real.

 

Want to build a resilient cyber culture in your organisation? Explore globally recognized certifications from ISACA — and give your team the tools they need to defend what matters.