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McAfee Finds Years-Long Attack by Chinese-Linked APT Groups

As advanced persistent threats go, the one uncovered by McAfee should serve as a wake-up call for IT security teams. ....

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Hafnium's China Chopper: a 'slick' and tiny web shell for creating server backdoors

Hafnium is a group of cyberattackers originating from China. The collective recently came into the spotlight due to Microsoft linking them to recent attacks exploiting four zero-day vulnerabilities CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065 in Microsoft Exchange Server.
Microsoft says that Hafnium tends to strike targets in the United States, focusing on industries including defense, research, law, and higher education. While believed to be based in China, the group uses leased virtual private servers (VPS) in the US.
Due to the renewed interest in Hafnium, on Monday, Trustwave published an analysis of one of the group s tools, China Chopper, which is a web shell widely used for post-exploitation activities. ....

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Mandiant: MS Exchange bugs first exploited in January

Mandiant: MS Exchange bugs first exploited in January
Analysis from technical teams at FireEye’s Mandiant tracked activity exploiting newly disclosed vulnerabilities in Microsoft Exchange Server more than a month ago
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Published: 05 Mar 2021 15:00
Malicious actors were abusing four vulnerabilities disclosed this week in on-premise instances of Microsoft Exchange Server as far back as January 2021, according to a new report produced by FireEye Mandiant researchers Matt Bromiley, Chris DiGiamo, Andrew Thompson and Robert Wallace.
Disclosed earlier this week alongside an out-of-sequence patch, exploitation of the four vulnerabilities, one rated critical and three medium, was linked by Microsoft to a Chinese advanced persistent threat (APT) group known as Hafnium, although there is already bountiful evidence to suggest exploitation of the CVEs goes far beyond one group. ....

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