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SECURITY ADVISORIES
Nov 22, 2021
Microsoft Exchange Vulnerability - CVE-2021-42321
THE THREAT eSentire has identified publicly available Proof-of-Concept (PoC) exploit code, for the critical Microsoft Exchange vulnerability CVE-2021-42321. CVE-2021-42321 was announced as part of Microsoft’s November Patch Tuesday release. Exploitation would allow a remote threat actor, with previous authentication, to execute code on vulnerable servers. Prior to the patch release, Microsoft…
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ABOUT ESENTIRE
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1000+ organizations in 70+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
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LATEST PRESS RELEASE
Oct 28, 2021
Telarus and eSentire Expand Partnership to Safeguard Enterprises Globally Against Business Disrupting Ransomware and Zero-Day Attacks
London, UK and Sydney, Australia– Oct. 28, 2021 - eSentire, recognized globally as the Authority in Managed Detection and Response (MDR), today announces the expansion of its partnership with Telarus, the largest privately-held distributor of business cloud infrastructure and contact centre services. Building on their mutual success across North America, Telarus will bring eSentire’s Managed…
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Our award-winning partner program offers financial rewards, sales and marketing tools and personalized training. Accelerate your business and grow your revenue by offering our world-class Managed Detection and Response (MDR) services.
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Resources
Case study

Third party serves as staging point for cryptojacking attack using Powershell

eSentire observed an unknown threat actor attempting to deploy Monero cryptocurrency mining malware to multiple eSentire customers. This increasingly common type of attack known as “cryptojacking” allows a hacker to leverage the computing power of devices on a personal or corporate network to mine cryptocurrencies, unbeknownst to the victim. Ultimately, this category of attack can lead to poor device performance or potential failure resulting in financial and regulatory repercussions.

Following an investigation from eSentire’s Security Operations Center (SOC) analysts, it was determined that the threat actor was leveraging a previously unknown vulnerability (zero-day exploit) in Kaseya’s Virtual Systems Administrator (VSA) agent as a vector to gain access to the clients’ network.

Read this case study for more details and to see how eSentire remediated the attack.

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Webinar
Defending Against Modern Ransomware: Lessons from the SunWalker Incident
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