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Jan 13, 2022
GootLoader Hackers Are Compromising Employees of Law and Accounting Firms, Warns eSentire
GootLoader Gang Launches Wide-Spread Cyberattacks Enticing Legal and Accounting Employees to Download Malware eSentire, the industry’s leading Managed Detection and Response (MDR) cybersecurity provider, is warning law and accounting firms of a wide-spread GootLoader hacker campaign. In the past three weeks and as recently as January 6, eSentire’s threat hunters have intercepted and shut down…
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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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Security advisories — Mar 10, 2021

Proof-of-Concept Exploit Code Released for Critical Exchange Vulnerabilities

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THE THREAT

As of, March 10th, 2021, publicly available Proof-of-Concept (PoC) exploit code and in-depth technical details for two of the recent Microsoft Exchange zero-day vulnerabilities (known as ProxyLogon) has been confirmed. The PoC code will allow less skilled threat actors to exploit CVE-2021–26855 and CVE-2021–27065 and cause Remote Code Execution on vulnerable on-premise Exchange servers.

Widespread exploitation of these vulnerabilities is now imminent. Organizations that have not already applied the Microsoft security patches need to do so immediately.

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Additional information

The eSentire Threat Intelligence team has observed several markers towards mass exploitation of ProxyLogon vulnerabilities in the last 24 hours. Security firm Praetorian released technical details of the vulnerabilities on March 9th, but omitted publishing key details for exploitation. During the afternoon of March 10th, several reports of working Proof-of-Concept code emerged online. While we have not independently verified the PoC, several prominent security researchers have attested to their validity.

Given the increasing scope of widespread attacks over the past week and emergence of vulnerability details and working exploits, organizations must take immediate action to mitigate the vulnerabilities through security updates, workarounds or by restricting access to their on-prem Exchange servers.

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