ransomware
Ransomware is a computer program that locks up your files or systems and demands payment, often in cryptocurrency, before you get access back.
In plain English
Think of your front door, except one morning you wake up to find a stranger has changed the lock while you slept, and slid a note under the door saying they will give you the new key only if you pay them first.
That is ransomware, except the door is your computer, your phone, or your company's entire banking system, and the stranger is a programme that snuck in through a dodgy email attachment, a fake invoice, or a link somebody clicked without thinking twice.
Once it is in, it calmly scrambles your files with a code only the attacker holds, and a message pops up demanding payment before you get the key to unscramble everything.
A small business in Lagos might open what looks like a customer's payment receipt, only for it to freeze every file in their accounts office, with a demand for payment in bitcoin before the close of business.
In the United Kingdom, hospitals and local councils have had entire appointment systems and payment records held hostage this way, sometimes for weeks, at a cost far higher than whatever the attackers first asked for.
For someone abroad sending money home, the danger is quieter but just as real. If the bank or payment app you use gets hit by ransomware, your transfer can simply vanish into a queue that nobody can access until the mess is cleared.
A Port Harcourt logistics firm gets a ransom note demanding ₦8,000,000 in cryptocurrency to open its delivery and invoicing records, and loses another ₦3,000,000 in missed deliveries while deciding whether to pay or rebuild from scratch.
Questions people ask
Should I ever pay the ransom?
Most security experts and banks advise against it, because paying does not guarantee you get your files back, and it tells criminals that you are a soft target worth attacking again.
How does ransomware usually get into a system?
Mostly through email attachments, fake software updates, or links that look legitimate, so the habit of pausing before you click anything unfamiliar is worth more than any antivirus programme.
Can ransomware affect my bank account directly?
It rarely touches your money directly, but if it infects your bank's or employer's systems, your transfers, salary payments, or account access can be delayed or frozen until the problem is fixed.
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