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At least 30,000 US organizations, small businesses and government offices were victims of Microsoft Exchange hack: Krebs

At least 30,000 US organizations, small businesses and government offices were victims of Microsoft Exchange hack: Krebs

Microsoft's CEO Satya Nadella
Tobias Schwarz/Getty Images




An espionage group has hacked some 30,000 US organizations over the past few days, KrebsOnSecurity reported.




Microsoft released several security updates to its Exchange email product to combat the hack.




The group was able to target businesses and local government agencies, according to KrebsOnSecurity.




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At least 30,0000 organizations across the US have been hacked over the last few days through flaws in Microsoft's Exchange server email software, sources familiar with the matter told KrebsOnSecurity.The "unusually aggressive Chinese cyber espionage unit" that Microsoft calls "Hafnium" is focusing on stealing emails from a range of victims, including companies, small businesses, and local governments, Krebs said. The group exploited four flaws in Microsoft's Exchange servers. The bugs gave attackers full remote control over the affected systems.With each hacking incident, the group left behind a hacking tool called "web shell" that is protected by an easy password and could be accessed from any internet browser, the cybersecurity blog said. This tool allowed hackers to have administrative access to computer servers.
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