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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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Incident report

Amazon Web Services (AWS) Brute Force Attack

Brute force is one of the most commonly used methods adversaries use to gain access to an account or server. When passwords are unknown, an attacker attempts to gain access using different combinations of usernames and passwords until account lockout or a correct username and password are submitted. While incorrect logins frequently occur, the delineation between an intrusion attempt and a legitimate user requires a defined process to quickly filter noise from possible cyberattack.

Due to the number of incorrect login attempts that are more prevalent in organizations with remote services, timely and scalable investigations are paramount to identifying, confirming and responding to potential attacks. In this incident, eSentire’s SOC leveraged MDR for Log to detect a threat actor’s presence on a customer’s AWS instance almost immediately and mitigated it in less than 17 minutes.

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