Little things, huge consequences

Security & Privacy

This is the third in a series of posts about Cyber Defense that happened to real people in real life, costing very real money.

business security, usb stick, network security

Tomasz was a finance graduate, fresh out of university. This wasn’t what he had dreamed of studying, but he expected to find a well-paid job afterwards. This is why he started working in a branch of a local cooperative bank.

The job wasn’t very demanding. During the day he didn’t have to deal with many customers, which suited him just fine. It did annoy him a bit that his work computer was only connected to an internal network and not the Internet, as with every other computer in the bank. This protocol protected the system from unauthorised outside access, which is crucial for a bank. It also, however, meant that employees were not able to check their private email accounts or access newsfeeds on social networking sites.

One day, Tomasz noticed his computer behaving in a strange way. The machine was slow and crashed repeatedly, not to mention the error messages flashing on his screen. It was of no use for work. Things got even worse when the monitor simply went dark. Despite trying numberous times, Tomasz couldn’t turn it on again. He didn’t want to waste his precious time so he called the IT department about the problem.

It turned out that he wasn’t the only one. All of the computers at the bank had gone crazy. The branch had to be closed down for four hours. A ten-person IT team responded to the crisis, launching a backup system. After several hours they were able to restore all computers to working order. What had happened was that a virus had infected the network. The head of the IT department wanted to know whose computer was attacked first.

An internal investigation revealed that the malware came from Tomasz’s machine and the source of the infection was one of the bank’s flash drives. A few weeks earlier, Tomasz had copied his holiday photos to the drive to show them to his colleagues. The virus entered the device’s memory when the photos were copied from Tomasz’s private laptop.

He was quickly called into his boss’s office. Tomasz knew all too well that he had violated security protocol. He knew that he would be punished, but how harshly? In the end, Tomasz was officially reprimanded and a note was placed on his file. Considering that his negligence cost the bank several thousand euro, this was merely a slap on the wrist. However, because of his recklessness, Tomasz had endangered sensitive data stored in the bank’s system, not to mention his own future career.

Your business can be smart enough to prevent your own Tomasz from causing you heartache.

“Your network can be set up so only administrators can add new hardware,” F-Secure Security Advisor Sean Sullivan explained. “And why shouldn’t it be?”

For more insight into how to keep your business safe, check out our Business Insider blog.




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