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Fake Windows Update Delivers Cyborg Ransomware

November 20, 2019

A fake Windows Update spam campaign has been dropping the Cyborg ransomware. The mail delivery mechanism claims to come from Microsoft. It directs the potential victim to an attachment described as the ‘latest critical update’.

“The fake update attachment,” writes Trustwave (who discovered the campaign), “although having a ‘.jpg’ file extension, is an executable file. Its filename is randomized and its file size is around 28KB. This executable file is a malicious .NET downloader that will deliver another malware to the infected system.”

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