Security research company Websense Security Labs has warned of a new wave of malicious spoof Microsoft security e-mails.
The fake security bulletins – Microsoft doesn’t send out unsolicited security e-mails – try to get users to download a Trojan virus by disguising it as a cumulative security patch supposedly protecting recipients against recently unleashed viruses and Trojans.
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Once installed, the malware infects users’ machines with an SDBot variant, which is currently undetected by most major anti-virus software suppliers.
The Bot allows complete remote unauthorised access to the user’s machine, allowing hackers to use the infected PC to spread other attacks or use it to complete fraudulent transactions on the internet.