Security News
Threat actors are now installing a new ransomware called 'DEARCRY' after hacking into Microsoft Exchange servers using the recently disclosed ProxyLogon vulnerabilities. Since Microsoft revealed earlier this month that threat actors were compromising Microsoft Exchange servers using new zero-day ProxyLogon vulnerabilities, a significant concern has been when threat actors would use it to deploy ransomware.
Threat actors are now installing a new ransomware called 'DEARCRY' after hacking into Microsoft Exchange servers using the recently disclosed ProxyLogon vulnerabilities. Since Microsoft revealed earlier this month that threat actors were compromising Microsoft Exchange servers using new zero-day ProxyLogon vulnerabilities, a significant concern has been when threat actors would use it to deploy ransomware.
Recently patched Microsoft Exchange vulnerabilities are under fire from at least 10 different advanced persistent threat groups, all bent on compromising email servers around the world. Microsoft said in early March that it had spotted multiple zero-day exploits in the wild being used to attack on-premises versions of Microsoft Exchange Server.
Commentary: Enterprises try their best to secure their data, but running on-premises mail servers arguably doesn't do this. We can have a debate about how soon enterprises should embrace cloud.
A week after Microsoft warned that four zero-day flaws and three others in its Exchange Server were being actively exploited and issued out-of-band remediation, the cloudy Windows biz has delivered software fixes to address 82 other vulnerabilities as part of its monthly Patch Tuesday ritual. Microsoft says two of these vulnerabilities are publicly known and five are under active exploitation.
A cryptomining botnet spotted last year is now targeting and attempting to take control of Jenkins and ElasticSearch servers to mine for Monero cryptocurrency. Z0Miner is a cryptomining malware strain spotted in November by the Tencent Security Team, who saw it infecting thousands of servers by exploiting a Weblogic security vulnerability.
Microsoft has released security updates for Microsoft Exchange servers running unsupported Cumulative Update versions vulnerable to ProxyLogon attacks. These additional security updates are meant to be installed only on machines running Exchange Server versions not supported by the original Match 2021 security patches released a week ago, only if the admin can't find an update path to a supported version.
Victims of a massive global hack of Microsoft email server software - estimated in the tens of thousands by cybersecurity responders - hustled Monday to shore up infected systems and try to diminish chances that intruders might steal data or hobble their networks. While the hack doesn't pose the kind of national security threat as the more sophisticated SolarWinds campaign, which the Biden administration blames on Russian intelligence officers, it can be an existential threat for victims who didn't install the patch in time and now have hackers lingering in their systems.
The European Banking Authority took down all email systems after their Microsoft Exchange Servers were hacked as part of the ongoing attacks targeting organizations worldwide. Last week, Microsoft patched multiple zero-day vulnerabilities affecting on-premises versions of Microsoft Exchange Server and exploited in ongoing attacks coordinated by multiple state-sponsored hacking groups.
The Biden administration has urged users of Microsoft's Exchange mail and messaging server to ensure they have not fallen victim to the recently-detected "Hafnium" attack on Exchange Server that Microsoft says originated in China. Microsoft revealed the attack last week and released Exchange security updates.