based Volexity for reporting the vulnerabilities. Microsoft’s initial advisory about the Exchange flaws credited Reston, Va. national security advisors on the attack told KrebsOnSecurity the Chinese hacking group thought to be responsible has seized control over “hundreds of thousands” of Microsoft Exchange Servers worldwide - with each victim system representing approximately one organization that uses Exchange to process email. Speaking on condition of anonymity, two cybersecurity experts who’ve briefed U.S. The web shell gives the attackers administrative access to the victim’s computer servers. In each incident, the intruders have left behind a “web shell,” an easy-to-use, password-protected hacking tool that can be accessed over the Internet from any browser. In the three days since then, security experts say the same Chinese cyber espionage group has dramatically stepped up attacks on any vulnerable, unpatched Exchange servers worldwide. Microsoft said the Exchange flaws are being targeted by a previously unidentified Chinese hacking crew it dubbed “ Hafnium,” and said the group had been conducting targeted attacks on email systems used by a range of industry sectors, including infectious disease researchers, law firms, higher education institutions, defense contractors, policy think tanks, and NGOs.
On March 2, Microsoft released emergency security updates to plug four security holes in Exchange Server versions 2013 through 2019 that hackers were actively using to siphon email communications from Internet-facing systems running Exchange.
The espionage group is exploiting four newly-discovered flaws in Microsoft Exchange Server email software, and has seeded hundreds of thousands of victim organizations worldwide with tools that give the attackers total, remote control over affected systems. The installed application is an open source software.At least 30,000 organizations across the United States - including a significant number of small businesses, towns, cities and local governments - have over the past few days been hacked by an unusually aggressive Chinese cyber espionage unit that’s focused on stealing email from victim organizations, multiple sources tell KrebsOnSecurity. Interoperability with codes written in other languagesĭisclaimer: Apps4Rent does not offer commercial licenses of any of the products mentioned above.
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