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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 Us
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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Leadership Work at eSentire
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 — Jan 09, 2020

Recent Media Reports on Operation Cloud Hopper

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The Threat

eSentire has been tracking operation Cloud Hopper since its emergence in 2014. Cloud Hopper is a campaign that is conducted by the Chinese hacking group known as APT10 (Stone Panda) and targets Managed Service Providers (MSPs). Recent reporting from the Wall Street Journal states that operation Cloud Hopper is significantly larger and has affected more companies than previously believed [1]. eSentire continues to monitor for this campaign and has not detected it against eSentire.

What we’re doing about it

What you should do about it

Additional information

Tactics, Techniques & Procedures (TTPS)

Known Affected Industries [2]:



[1] https://www.wsj.com/articles/ghosts-in-the-clouds-inside-chinas-major-corporate-hack-11577729061

[2] https://www.us-cert.gov/sites/default/files/publications/Chinese-Cyber-Activity-Targeting-Managed-Service-Providers.pdf

[3] https://www.reuters.com/investigates/special-report/china-cyber-cloudhopper/

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