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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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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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Resources
Threat dissection

Anatomy of an Attack: Gaining Remote Access Using Valid Credentials

With the increasing proliferation of the remote workforce, most organizations provide the ability for remote access into their networks, either via VPN, Citrix, or other access mechanisms. External remote services allow users to connect to internal network resources from external locations. Remote service gateways often manage connections and credential authentication for these services.

Adversaries who have obtained valid account credentials may leverage external remote services as a point of initial access into your network and a mechanism for establishing persistence. Attacks from external remote services are difficult to detect given the use of valid credentials to obtain initial access.

This gives the appearance of legitimate authentication to the services, therefore discovering the malicious activity before damage is done involves threat hunting expertise and advanced machine learning capabilities. Suspicious Remote Access can be leveraged in every stage of the “Cyber Kill Chain”, AKA attack path so vigilance in detecting adversary presence is key.

Read this threat dissection for more information on the challenges of suspicious remote access incidents and see how eSentire’s proprietary machine learning tools & MDR for Log work together to detect them.

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