Remove dns-leak
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What Is a DNS Leak? Definition, Causes, Security Implications and Prevention

Heimadal Security

A ‘DNS leak’ is a security flaw that reveals Domain Name System (DNS) requests to an Internet Service Provider’s (ISP) servers, despite the user’s effort to conceal them through a Virtual Private Network (VPN) service. The post What Is a DNS Leak?

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Russian Retailer DNS Confirms Data Breach

Heimadal Security

DNS (Digital Network System), a Russian retail chain, disclosed yesterday that its systems have been breached by a threat actor. As a result, the personal data of customers and employees leaked online. DNS is Russia’s second-largest store chain […]. DNS is Russia’s second-largest store chain […].

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Implementing Zero Trust: Beyond Internal Network Models

Security Boulevard

For each attempted communication leaving your organization, the best way to ensure cyber resiliency and protect the organization from ensuing data leaks and damage is to understand: (i) Where is this connection going? (ii) CISA and the NSA call this Protective DNS and recommend it as part of the Shields Up initiative.

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Security Affairs newsletter Round 369 by Pierluigi Paganini

Security Affairs

sections “The Underdogs – Best Personal (non-commercial) Security Blog” and “The Tech Whizz – Best Technical Blog”). Please vote for Security Affairs and Pierluigi Paganini in every category that includes them (e.g. To nominate, please visit:?. Follow me on Twitter: @securityaffairs and Facebook. Pierluigi Paganini.

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How Cobalt Strike Became a Favorite Tool of Hackers

eSecurity Planet

The Cobalt Strike’s Command and Control protocol is a DNS-based communication that is pretty hard to detect compared to classic HTTP traffic. It’s a pretty clever way to hide malicious instructions using DNS entries and some obfuscation algorithm the Beacon can decode. Cobalt strike is a premium product. Back to the starting point.

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Analyzing the APT34’s Jason project

Security Affairs

Security expert Marco Ramilli has analyzed the recently leaked APT34 hacking tool tracked as Jason – Exchange Mail BF. Today I want to share a quick analysis on a new leaked APT34 Tool in order to track similarities between APT34 public available toolsets. Original Leak. Leaked ZIP content. to 9998 (why not 9999?)

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Building a Custom SecureX Orchestration Workflow for Umbrella

Cisco Security

We used Cisco Secure Malware Analytics to analyze files and monitor any potential PII leaks. Last but not least, we used Umbrella to add DNS level visibility, threat intelligence and protection to the entire network. Lets go over an example scenario which many customers may find themselves in.

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