Security Boulevard
Community Chats Webinars Library Timeline of a Hafnium Attack
The attacks on Microsoft Exchange servers around the world by Chinese state-sponsored threat group Hafnium are believed to have affected over 21,000 organizations. The impact of these attacks is growing as the four zero-day vulnerabilities are getting picked up by new threat actors.
While the world was introduced to these critical vulnerabilities on March 2
nd when Microsoft released security updates and mitigation guidance, the first known exploitation of this vulnerability occurred in early January. Although applying Microsoft’s advised updates protects organizations from continued or future exploitation of these known vulnerabilities, they don’t mitigate any compromises that have already happened. And because these Exchange vulnerabilities are exposed to the internet, cybercriminals continue to voraciously seek out unpatched systems to attack at unprecedented scale.
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Threat actors targeted compromised Exchange servers to host malicious Monero cryptominer in an “unusual attack,” Sophos researchers discovered.
Cryptojacking can be added to the list of threats that face any unpatched Exchange servers that remain vulnerable to the now-infamous ProxyLogon exploit, new research has found.
Researchers discovered the threat actors using Exchange servers compromised using the highly publicized exploit chain which suffered a barrage of attacks from advanced persistent threat (APT) groups to infect systems with everything from ransomware to webshells to host Monero cryptomining malware, according to a report posted online this week by SophosLabs.
Global security provider Sophos has discovered a Microsoft Exchange Server hosting a malicious monero cryptominer which is aimed at other Exchange ser.
Compromised Microsoft Exchange Server Used to Host darkreading.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from darkreading.com Daily Mail and Mail on Sunday newspapers.