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SECURITY ADVISORIES
Oct 18, 2021
Grief Ransomware Gang Claims 41 New Victims, Targeting Manufacturers; Municipalities; & Service Companies in U.K. & Europe
Grief Operators Earned an Estimated 8.5 Million British Pounds in Four Months Key Findings: The Grief Ransomware Gang (a rebrand of the DoppelPaymer Ransomware Group) claims to have infected 41 new victims between May 27, 2021—Oct. 1, 2021 with their ransomware.Over half the companies listed on Grief’s underground leak site are based in the U.K. and Europe. The Grief Ransomware Gang appears to…
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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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Oct 12, 2021
eSentire Launches MDR with Microsoft Azure Sentinel Extending Response Capabilities Across Entire Microsoft Security Ecosystem
Waterloo, ON – Oct. 12, 2021 -- eSentire, recognized globally as the Authority in Managed Detection and Response (MDR), today announced the expansion of its award-winning MDR services with Microsoft Azure Sentinel, as part of its integration with the complete Microsoft 365 Defender and Azure Defender product suites supporting Microsoft SIEM, endpoint, identity, email and cloud security services.…
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Security advisories — Feb 26, 2019

Cloudbleed Vulnerability Alert

The internet company Cloudflare has indicated that for the period between September 22, 2016 and February 18, 2017 approximately 3,500 websites were vulnerable to interception of private data due to a data processing flaw. The vulnerability, known as “Cloudbleed”, has resulted in the potential exposure of user’s passwords and personally identifiable information. Up to this time, there is no direct indication that any of the potentially exposed data was accessed by hackers. Customers are advised to be vigilant of potential scam activities, as attackers are known to use media events to their advantage. eSentire’s security teams are monitoring this situation, further updates will be provided if feasible.

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Additional Details

Customers should be aware that the Cloudbleed vulnerability only affected certain Cloudflare services. The official list of exposed websites has not been published yet. As per the Cloudflare statement, the greatest period of impact was likely from February 13 and February 18, 2017. During that period, around 0.00003% of HTTP requests processed through Cloudflare potentially resulted in random data leakage.

Depending on the sites accessed, the leaked information could include private messages from major dating sites, full messages from chat services, content from adult video sites, hotel bookings, online password manager credentials, and other types of sensitive data. Customers should be vigilant about any suspicious email communication imitating Cloudflare, and refrain from providing any information to unofficial enqueries or for the alleged purpose of validating the Cloudbleed exposure.