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“Two pieces of malware, known as ‘GOZeuS’ and ‘CryptoLocker’, are responsible for this alert. They typically infect a computer via email attachments or links in email messages, which may look like they have been sent by genuine contacts and may purport to carry innocuous files or links.
“If a user clicks on the ‘GOZeuS’ malware it will silently monitor user activity and try to capture information such as bank details, etc. The ‘CryptoLocker’ malware is activated if the first attack is not profitable enough. This is where users are locked from their files and threatened with their deletion unless a ransom is paid.
“These email messages are generated by other victims’ computers, who do not realise that they are part of a cybercrime botnet being used to send mass emails, creating more victims.”
“This malware has already infected computer systems, but the recent law enforcement activity has disrupted the machines that control the operation of the cybercrime botnet. With these servers not functioning, the cyber criminals should temporarily be unable to manage the computers that have been hijacked.
“This threat applies to businesses as much as home users, and business computer systems could be part of the same cybercrime botnet. If a user is likely to click on an attachment or link at home, then they are also liable to click on it at work. All businesses are vulnerable, but those with a comprehensive security infrastructure will be better equipped to deal with these attacks before the user has an opportunity to activate the malware.”
“All computer users are being urged to make sure that this malware has not infected their machines. These mostly affect the Windows operating system, although it’s worth being vigilant when it comes to cyber security regardless of your operating system. In general:
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