Microsoft Exchange servers Archives

Security News

Over 2000 Exchange Servers Hacked Using ProxyShell Exploit

ByVladimir KrasnogolovyAugust 26, 2021

Researchers at Huntress Labs estimate that over the past few days, about 2,000 Microsoft Exchange mail servers have been compromised and infected with backdoors, because their owners have not installed patches to fix ProxyShell vulnerabilities. Let me remind you that the

Security News

Hackers exploit ProxyShell vulnerabilities to install backdoors

ByVladimir KrasnogolovyAugust 16, 2021

Experts warn that hackers are attacking Microsoft Exchange servers, exploiting ProxyShell vulnerabilities, and installing backdoors on them for subsequent access. Let me remind you that the vulnerabilities, which are collectively called ProxyShell, were recently discussed at

Security News

GitHub Developers Review Exploit Posting Policy Due to Recent Scandal

ByVladimir KrasnogolovyApril 30, 2021

The GitHub developers review the exploit posting policy and want to discuss with the information security community a series of changes to the site rules. These rules determine how employees deal with malware and exploits uploaded to the platform. The proposed changes imply

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Prometei botnet attacks vulnerable Microsoft Exchange servers

ByVladimir KrasnogolovyApril 23, 2021

Since the patches for ProxyLogon problems were still not installed, cybercriminals continue their activity, for example, the updated Prometei botnet attacks vulnerable Microsoft Exchange servers. Researchers from Cybereason Nocturnus discovered Prometei malware, which mines

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FBI removed web shells from vulnerable Microsoft Exchange servers without informing owners

ByVladimir KrasnogolovyApril 14, 2021

The US Department of Justice reported that a court in early April granted the FBI special powers and the bureau removed web shells previously installed by hackers on vulnerable Exchange servers in the United States. The FBI also had the power to remove other malware (without

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Hackers attack Microsoft Exchange servers on behalf of Brian Krebs

ByVladimir KrasnogolovyMarch 30, 2021

The well-known information security expert, journalist and author of the KrebsOnSecurity blog has repeatedly become a target for attacks and mockery of hackers. Now hackers are attack Microsoft Exchange servers with Proxylogon vulnerabilities on behalf of Brian Krebs. The

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Valak malware steals corporate data using Microsoft Exchange servers

ByVladimir KrasnogolovyMay 29, 2020

Cyberreason Nocturnus experts said that the Valak bootloader discovered in 2019 now exploits vulnerabilities in Microsoft Exchange servers. It has become a full-fledged info-staler and attacks companies in the USA and Germany. Researchers write that in the last six months,