article thumbnail

How to protect backup servers from ransomware

CyberSecurity Insiders

We all know that backup servers are only the sole saviors to an organization when a ransomware incident strikes their IT infrastructure. Block outbound DNS Requests – Whenever a malware strikes a server, the first thing it does is to establish a connection with a command-and-control server.

Backups 116
article thumbnail

Ransomware: Why do backups fail when you need them most?

Malwarebytes

It’s widely known, and endlessly repeated, that the last, best line of defence against the potentially devastating effects of a ransomware attack is your backups. Starting there, the obvious conclusion from experiences like Kacoroski’s is that backups are hard to get right. Why do backups fail?

Backups 88
Insiders

Sign Up for our Newsletter

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

article thumbnail

A Cryptomining botnet abuses Bitcoin blockchain transactions as C2 backup mechanism

Security Affairs

Crooks are exploiting BTC blockchain transactions to hide backup command-and-control (C2) server addresses for a cryptomining botnet. Security experts from Akamai have spotted a new botnet used for illicit cryptocurrency mining activities that are abusing Bitcoin (BTC) transactions to implement a backup mechanism for C2.

Backups 111
article thumbnail

NCSC report warns of DNS Hijacking Attacks

Security Affairs

The UK’s National Cyber Security Centre (NCSC) issued a security advisory to warn organizations of DNS hijacking attacks and provided recommendations this type of attack. In response to the numerous DNS hijacking attacks the UK’s National Cyber Security Centre (NCSC) issued an alert to warn organizations of this type of attack.

DNS 79
article thumbnail

Microsoft Patch Tuesday, March 2021 Edition

Krebs on Security

For the second month in a row, Microsoft has patched scary flaws in the DNS servers on Windows Server 2008 through 2019 versions that could be used to remotely install software of the attacker’s choice. All five of the DNS bugs quashed in today’s patch batch earned a CVSS Score (danger metric) of 9.8 — almost as bad as it gets.

DNS 317
article thumbnail

Microsoft Patch Tuesday, July 2021 Edition

Krebs on Security

.” Another concerning critical vulnerability in the July batch is CVE-2021-34494 , a dangerous bug in the Windows DNS Server that earned a CVSS score (severity) of 9.8 “In a Windows Domain environment, Windows DNS Server is critical to business operations and often installed on the domain controller. .

DNS 277
article thumbnail

A Reactive Cybersecurity Strategy Is No Strategy at All

CyberSecurity Insiders

By increasing visibility into DNS traffic, CISOs can detect, block, and respond to incidents more quickly as well as use this data to institute new controls and increase overall resiliency. So why aren’t more organizations taking advantage of protective DNS? The issue likely comes down to awareness.

DNS 140