Heimadal Security

MARCH 29, 2023

Hackers can use C&C or C2 servers to create botnets and launch DDoS attacks, steal, delete, and/or encrypt data. Techniques and DNS Security Risks appeared first on Heimdal Security Blog. Basically, a […] The post Command-and-Control Servers Explained.

DNS 89

DNS Risk DDOS Encryption 89

Schneier on Security

MAY 1, 2018

From their blog post : Finding #3: Many IoT Devices Contact a Large and Diverse Set of Third Parties In many cases, consumers expect that their devices contact manufacturers' servers, but communication with other third-party destinations may not be a behavior that consumers expect. Amcrest WiFi Security Camera. No surprises there.

IoT 177

IoT Manufacturing Encryption DNS 177

Vipre

JANUARY 27, 2021

Most of you have probably heard about encrypted DNS (DNS-over-HTTPS or DoH, and DNS-over-TLS or DoT) and have noticed that several of the major browser vendors have rolled out support for these newer protocols. Maybe you don’t even run your own DNS server, so why would you care? is the OS’s problem.

DNS 45

DNS Encryption 45

Cisco Security

MARCH 27, 2021

Shrink the DNS attack surface with Auth-DoH. In this analogy, the invisibility superpower is DNS over HTTPS (DoH). It’s a new protocol that encrypts the DNS request to keep bad actors from discovering or altering domain names or snooping on users’ internet destinations. My inspiration: Loki , the Marvel superhero.)

DNS 105

DNS VPN Advertising Encryption 105

Troy Hunt

JULY 12, 2018

The rapid adoption has been driven by a combination of ever more visible browser warnings (it was Chrome and Firefox's changes which prompted the aforementioned tipping point post), more easily accessible certificates via both Let's Encrypt and Cloudflare and a growing awareness of the risks that unencrypted traffic presents. DNS Hijacking.

DNS 275

DNS Wireless Risk Banking 275

Cisco Security

SEPTEMBER 24, 2021

Earlier this year in a blog post , I shared a bit about our Auth-DoH idea. It’s a forward-looking idea to improve DNS security. DDR allows for upgrading from insecure DNS to secure DNS. DDR allows for upgrading from insecure DNS to secure DNS. In case it’s not top of mind, let me help refresh your memory.

DNS 106

DNS Encryption Advertising Technology 106

Security Boulevard

AUGUST 6, 2024

Threat Intelligence Report Date: August 6, 2024 Prepared by: David Brunsdon, Threat Intelligence - Security Engineer, HYAS Dynamic DNS (DDNS) is a service that automatically updates the Domain Name System (DNS) in real-time to reflect changes in the IP addresses of a domain.

DNS 69

DNS Malware Social Engineering Engineering 69

Malwarebytes

DECEMBER 1, 2023

For a “normal” connection to a website, a Domian Name System (DNS) finds the IP address for the requested domain name. As I explained in the blog DNS hijacks: what to look for , DNS is the phonebook of the internet to the effect that the input is a name and the output is a number.

DNS 126

DNS Internet Internet Encryption 126

Fox IT

AUGUST 11, 2022

This Saitama implant uses DNS as its sole Command and Control channel and utilizes long sleep times and (sub)domain randomization to evade detection. In May 2022, security firm Malwarebytes published a two 1 -part 2 blog about a malware sample that utilizes DNS as its sole channel for C2 communication. Introduction.

DNS 66

DNS Engineering Malware Encryption 66

Cisco Security

AUGUST 11, 2021

We looked at REvil, also known as Sodinokibi or Sodin, earlier in the year in a Threat Trends blog on DNS Security. In it we talked about how REvil/Sodinokibi compromised far more endpoints than Ryuk, but had far less DNS communication. Figure 1-DNS activity surrounding REvil/Sodinokibi. Encrypting files.

Ransomware 128

Ransomware DNS Encryption Backups 128

Security Affairs

JUNE 12, 2022

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.

Ransomware 145

Ransomware DNS Cybercrime Hacking 145

Krebs on Security

APRIL 4, 2024

Launched in 2008, privnote.com employs technology that encrypts each message so that even Privnote itself cannot read its contents. For example, this account at Medium has authored more than a dozen blog posts in the past year singing the praises of Tornote as a secure, self-destructing messaging service.

Phishing 255

Phishing Cryptocurrency DDOS Internet 255

Malwarebytes

OCTOBER 5, 2021

According to Cloudflare—which has published an excellent explanation of what it saw—Facebook’s trouble started when its Autonomous System issued a BGP update withdrawing routes to its own DNS servers. Without DNS servers, the address facebook.com stopped working. Thankfully, it withstood the onslaught. ” part of our story.

DNS 145

DNS Internet Internet Mobile 145

Webroot

FEBRUARY 16, 2021

In recent months, you’ve likely heard about DNS over HTTPS , also known as DNS 2.0 and DoH, which is a method that uses the HTTPS protocol to encrypt DNS requests, shielding their contents from malicious actors and others who might misuse such information. Ultimately, this DNS privacy upgrade has been a long time coming.

DNS 75

DNS Encryption Firewall Network Security 75

CyberSecurity Insiders

JANUARY 6, 2022

This blog was written by an independent guest blogger. Secure Sockets Layer (SSL) is a standard security protocol that encrypts the connection between a web browser and a server. This only takes a few clicks, because an SSL certificate is a text file with encrypted data. HTTPS and DNS), data link (e.g.,

Encryption 134

Encryption Identity Theft Authentication Data breaches 134

Troy Hunt

NOVEMBER 25, 2020

When Patching Goes Wrong Now that I've finished talking about how patching should be autonomous, let's talk about the problems with that starting with an issue I raised in this tweet from yesterday: In the first of my IoT blog series yesterday, I lamented how one of my smart plugs was unexplainably inaccessible. HA has a Let's Encrypt add-on.

IoT 356

IoT Firmware Risk Manufacturing 356

Security Affairs

JUNE 20, 2022

sections “The Underdogs – Best Personal (non-commercial) Security Blog” and “The Tech Whizz – Best Technical Blog”). Security Affairs is one of the finalists for the best European Cybersecurity Blogger Awards 2022 – VOTE FOR YOUR WINNERS. Please vote for Security Affairs and Pierluigi Paganini in every category that includes them (e.g.

Spyware 112

Spyware DNS Surveillance Ransomware 112

Security Affairs

APRIL 12, 2019

this blog) will follow as soon as possible. Unfortunately, users that have no backups of their encryption keys will be not able to read their previous conversations. “The rebuilt infrastructure itself is secure, however, and the DNS issue has been solved without further abuse.

Hacking 108

Hacking DNS Passwords Data breaches 108

Security Affairs

FEBRUARY 9, 2021

Another interesting issue addressed by Microsoft with Microsoft February 2021 Patch Tuesday security updates is a Windows DNS Server Remote Code Execution vulnerability tracked as CVE-2021-24078. “This patch fixes a bug in the Windows DNS Server that could allow remote code execution on affected systems.

DNS 102

DNS IoT Backups Mobile 102

Malwarebytes

JUNE 5, 2022

” But for all the valid discussion about online anonymity, encryption, and privacy, Tor has an entirely different value proposition for people who build and maintain websites, and that is one of security. “There are so many security risks up the stack,” Muffett said.

Internet 131

Internet Internet DNS Surveillance 131

SecureList

SEPTEMBER 29, 2021

DNS hijacking. Later this year, in June, our internal systems found traces of a successful DNS hijacking affecting several government zones of a CIS member state. During these time frames, the authoritative DNS servers for the zones above were switched to attacker-controlled resolvers. December 28, 2020 to January 13, 2021.

DNS 137

DNS Malware Engineering Encryption 137

Webroot

JUNE 21, 2021

It may be as simple as the deployment of antivirus plus backup and recovery applications for your end users, or a more complex approach with security operations center (SOC) tools or managed response solutions coupled with network security tools such as DNS and Web filtering, network and endpoint firewalls, VPNs, backup and recovery and others.

Backups 127

Backups DNS Ransomware Antivirus 127

Malwarebytes

SEPTEMBER 14, 2022

From industry tips and best practices to the latest Malwarebytes product releases and how-tos, our Business newsletter is chock-full of the best of our business blog. DNS filtering. The next technology you need to prevent cyberattacks is a DNS filter. But first, a little bit about what DNS (domain name system) is.

Technology 88

Technology DNS Cyber Insurance Insurance 88

Daniel Miessler

SEPTEMBER 27, 2020

VPNs encrypt the traffic between you and some endpoint on the internet, which is where your VPN is based. If your VPN includes all DNS requests and traffic then you could be hiding significantly from your ISP. How bad is it to be a public figure (blog/YouTube) in 2020? This is true. The Government. So, probably not a win.

VPN 326

VPN Risk Hacking Encryption 326

Webroot

SEPTEMBER 7, 2023

How to protect your data A sophisticated, layered security strategy will already have prevention tools like endpoint and DNS protection in place as well as security awareness training to stop threats before they reach your network. If a cyber criminal gets access to emails, they won’t be able to access that sensitive data if it’s encrypted.

Encryption 97

Encryption Cyber Insurance Cybercrime Phishing 97

Security Affairs

MARCH 4, 2019

” reads a blog post published by the firm. ” continues the blog post. Instead, the real IP address of the C2 is obfuscated with what is essentially an encryption algorithm. Experts pointed out that DGA is a double-edged sword because allows security researchers to analyze DNS and network traffic to enumerate bots.

DNS 106

DNS Banking Advertising Ransomware 106

Security Affairs

MAY 15, 2023

Merdoor is a fully-featured backdoor that supports multiple capabilities, including installing itself as a service, keylogging, a variety of methods to communicate with its command-and-control (C&C) server (HTTP, HTTPS, DNS, UDP, TCP), and the ability to listen on a local port for commands.

Encryption 98

Encryption DNS Phishing Malware 98

eSecurity Planet

MARCH 14, 2022

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. Detecting Cobalt Strike Attacks.

Energy and Utilities 131

Energy and Utilities DNS Penetration Testing Ransomware 131

SecureList

NOVEMBER 6, 2024

It spreads via forums posts, torrent trackers and blogs, imitating popular software like Foxit PDF Editor and AutoCAD. Its parameters are also encrypted — they are decrypted once dropped by the first stage. SteelFox resolves this via Google Public DNS and DNS over HTTPS (DoH). xyz domain which serves as a C2 server.

Software 125

Software Cryptocurrency Malware DNS 125

SiteLock

AUGUST 27, 2021

Cybercriminals are constantly crawling the web for targets, and they’ll often go after websites you might not expect, such as a vegan cooking blog. An SSL Certificate is used to establish a secure encrypted connection between a web browser and a web server. Joe’s Vegan Blog Cooks Up Comment Spam.

Hacking 98

Hacking DDOS eCommerce Firewall 98

Security Affairs

JUNE 9, 2022

Other techniques employed by the APT group include DLL hijacking, Themida-packed files, and DNS tunneling to evade post-compromise detection. sections “The Underdogs – Best Personal (non-commercial) Security Blog” and “The Tech Whizz – Best Technical Blog”) To nominate, please visit:? Pierluigi Paganini.

Malware 98

Malware DNS Encryption Education 98

NetSpi Technical

OCTOBER 19, 2023

Let’s try DNS. To quickly test if we have DNS outbound, we can use Burp Suite Collaborator. This will give us a unique address that we can query and let us know if a DNS request was received. import socket data = socket.gethostbyname_ex(‘<collaborator URL>’) print(repr(data)) We have DNS outbound.

DNS 97

DNS Internet Internet Phishing 97

Security Affairs

APRIL 1, 2019

2014), as described on the MMD blog when MMD detected 5 variants active under almost 15 panels scattered in China network. On the MMD blog. Figure 1: The ARM version of Elknot malware on MMD blog. The growth was very rapid at that time (Sept. We could say here to have a ““Mirai” idea “ante-litteram” 2 years before.

DDOS 110

DDOS Malware Encryption Penetration Testing 110

SecureList

FEBRUARY 7, 2022

We have been tracking Roaming Mantis since 2018, and published five blog posts about this campaign: Roaming Mantis uses DNS hijacking to infect Android smartphones. It’s been a while since the last blog post, but we’ve observed some new activities by Roaming Mantis in 2021, and some changes in the Android Trojan Wroba.g (or

Phishing 99

Phishing DNS Mobile Malware 99

McAfee

SEPTEMBER 14, 2021

McAfee customers are protected from the malware/tools described in this blog. A more detailed blog with specific recommendations on using the McAfee portfolio and integrated partner solutions to defend against this attack can be found here. The hardcoded 208.67.222.222 resolves to a legitimate OpenDNS DNS server.

Malware 144

Malware DNS Accountability Manufacturing 144

SecureList

JUNE 15, 2022

Complex attacks almost invariably feature several phases, such as reconnaissance, initial access to the infrastructure, gaining access to target systems and/or privileges, and the actual malicious acts (data theft, destruction or encryption, etc.). are you the person who enters, checks nothing and encrypts the first random machines? $1k?

VPN 134

VPN Accountability Ransomware Encryption 134

Troy Hunt

JANUARY 10, 2018

Much of what I'm going to cover in the remainder of this blog post will focus on the site at uidai.gov.in We are rapidly approaching a "secure by default" web and the green padlock is becoming the norm ( about two thirds of all browser traffic is now encrypted ). rather than on the various subdomains.

Hacking 278

Hacking Government Encryption Risk 278