Krebs on Security

MARCH 11, 2022

John Todd is general manager of Quad9 , a free “anycast” DNS platform. DNS stands for Domain Name System, which is like a globally distributed phone book for the Internet that maps human-friendly website names (example.com) to numeric Internet addresses (8.8.4.4.) Of those 121 million events, 4.6

DNS 273

DNS Internet Internet Phishing 273

PerezBox Security

MARCH 2, 2019

I was recently at an event listening to representatives of ICANN and CloudFlare speak on security with DNS and it occurred to me that very few of us really understand. The post The Evolving World of DNS Security appeared first on PerezBox.

DNS 101

DNS Architecture Technology Information Security 101

CyberSecurity Insiders

MARCH 13, 2021

This activity was shortly followed by escalating activity involving brute force activity, remote code execution attempts, and exfiltration channel probing attempts all exploiting vulnerable DNS services on the domain controllers. The post Stories from the SOC – DNS recon + exfiltration appeared first on Cybersecurity Insiders.

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DNS Threat Detection Cybersecurity Cyber threats 54

Security Boulevard

AUGUST 12, 2021

The post DEF CON 29 Main Stage – Shir Tamari’s & Ami Luttwak’s ‘New Class Of DNS Vulns Affecting DNS-As-Service Platforms’ appeared first on Security Boulevard. Our thanks to DEFCON for publishing their outstanding DEFCON Conference Main Stage Videos on the groups' YouTube channel.

DNS 59

DNS Education InfoSec 59

Cisco Security

JUNE 13, 2022

For example, the security event might involve requests to communicate with an IP address, and the analyst would say, “This IP address belongs to my DNS server, so the traffic is legitimate.” Wait, what is the baseline, and how was it violated in this particular security event?” Annotated security events.

DNS 114

DNS Engineering Authentication Malware 114

CyberSecurity Insiders

FEBRUARY 16, 2023

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. Thus, blocking DNS systems from receiving external queries must become a priority and done technically.

Backups 116

Backups Ransomware DNS Encryption 116

Krebs on Security

OCTOBER 11, 2022

The new zero-day flaw– CVE-2022-41033 — is an “elevation of privilege” bug in the Windows COM+ event service, which provides system notifications when users logon or logoff. Microsoft says the flaw is being actively exploited, and that it was reported by an anonymous individual.

DNS 273

DNS Internet Internet Cyber threats 273

Troy Hunt

DECEMBER 13, 2019

Melbourne where I was due to do the closing keynote of the event. That's now done, questions answered and beers drunk and I left the event feeling great. I recorded this right before heading out for my final conference talk of the year at YOW!

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DNS 143

The Last Watchdog

MARCH 28, 2019

A couple of high-profile distributed denial-of-service (DDoS) attacks will surely go down in history as watershed events – each for different reasons. The Spamhaus attacker, for instance, noticed that there were literally millions of domain name system (DNS) resolvers that remained wide open all over the internet. Beyond DDoS.

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DDOS IoT DNS Internet 263

eSecurity Planet

JUNE 8, 2022

We had the InsightIDR core services and endpoint monitoring set up in our lab in just a few hours, and started receiving notifications about security events immediately. Configuring InsightIDR event sources. Configuring InsightIDR event sources. Also read: Testing & Evaluating SIEM Systems: A Review of Rapid7 InsightIDR.

DNS 97

DNS Data collection Marketing Passwords 97

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.

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DNS Encryption Firewall Network Security 69

Cisco Security

OCTOBER 28, 2021

Within Cisco Umbrella, we can look at the different events that it logs while monitoring DNS traffic. The Activity Search page shows information such as Identity (from Active Directory configuration), DNS Type, Internal IP, External IP, and the action that Umbrella took on each event.

Ransomware 116

Ransomware DNS Marketing Engineering 116

Cisco Security

AUGUST 12, 2021

Like other Black Hat conferences, the mission of the NOC is to build a conference network that is secure, stable and accessible for the training events, briefings, sponsors and attendees. Threat hunting is a core mission of the Cisco Secure team, while monitoring the DNS activity for potentially malicious activity. app.nihaocloud[.]com.

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DNS Firewall Phishing Mobile 144

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 98

DNS IoT Backups Mobile 98

eSecurity Planet

DECEMBER 8, 2023

Domain name service (DNS) attacks threaten every internet connection because they can deny, intercept, and hijack connections. With the internet playing an increasing role in business, securing DNS plays a critical role in both operations and security. Everything You Need to Know.

DNS 103

DNS DDOS Firewall Architecture 103

CSO Magazine

FEBRUARY 23, 2021

Common logs from servers and firewalls are fairly easily ingested and parsed, while DNS or physical security logs are much tougher to manage at scale, and block visibility into the security environment.

DNS 84

DNS Firewall 84

eSecurity Planet

JANUARY 6, 2021

Stack components impacted include DNS, IPv6, IPv4, TCP, ICMP, LLMNR, and mDNS. Forescout found DNS to be the most vulnerable due to its complexity, with TCP and IPv4 and IPv6 sub-stacks not far behind. DNS Cache Poisoning: 2. DNS Cache Poisoning. Also Read: How to Prevent DNS Attacks. Rely on internal DNS servers.

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IoT DNS Internet Internet 129

eSecurity Planet

SEPTEMBER 24, 2021

While InsightIDR functions as a security information and event management (SIEM) solution, its functionality goes far beyond traditional SIEM products and extends to the budding XDR space. From the InsightIDR home dashboard, administrators can see metrics like users, events processed, notable behaviors, new alerts, honeypots, and more.

DNS 111

DNS Technology Cybersecurity Data collection 111

Cisco Security

DECEMBER 1, 2021

Within Cisco Umbrella, we can look at the different events that it logs while monitoring DNS traffic. For example, the Activity Search page shows information such as Identity (from Active Directory configuration), DNS Type, Internal IP, External IP, and Umbrella’s action on each event.

Ransomware 68

Ransomware DNS Marketing Engineering 68

Webroot

MARCH 29, 2021

An endpoint DNS solution could have stopped the Trojanized Orion version by refusing to resolve the domain names of the command-and-control servers, again disrupting the infection to the point that no real damage could be done. But recent events have worked to undermine this growing understanding. The “next one” will look different.

Hacking 116

Hacking DNS Firewall Malware 116

SecureWorld News

OCTOBER 4, 2021

You want to catch up on what is going on in the world, wish your friends a happy birthday, see reactions to last night's new TV episode or sporting event. Brian Krebs shared this on Twitter this morning: Confirmed: The DNS records that tell systems how to find [link] or [link] got withdrawn this morning from the global routing tables.

DNS 83

DNS Media Engineering Accountability 83

Troy Hunt

JULY 12, 2018

I've done a heap of writing on this little device and regularly use it at conferences and training events. For example, check out how it's used when embedded in the TXT record of a DNS entry which is then loaded into a WHOIS service which doesn't properly output encode the results. DNS Hijacking.

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DNS Wireless Risk Banking 277

SecureList

JANUARY 22, 2024

The main Fat Mach-O file, tellingly named GUI , essentially implemented the PATCH button, clicking which launched two events: The Python installer was copied to the temporary file directory: /tmp/ The tool executable in the resources folder ran with administrator privileges. installer and an extra Mach-O file with the name tool.

Software 103

Software DNS Computers and Electronics Malware 103

Security Boulevard

JANUARY 30, 2024

If the BOF is used to query logged on users on localhost, the fully qualified computer DNS name from GetComputerNameExW is used. Figure 2 — Sessions Gathered with NetWkstaUserEnum An important note here is that fully qualified DNS names are important when supplying the servername argument. If that fails, the DNS suffix (e.g.,

DNS 64

DNS Data collection Accountability 64

Webroot

MAY 6, 2024

For businesses, this means implementing a comprehensive incident response plan that includes secure, immutable backups and regular testing to ensure rapid recovery in the event of an attack. Combine antivirus tools with DNS protection, endpoint monitoring, and user training for comprehensive protection.

Antivirus 84

Antivirus Cyber threats Education Phishing 84

CyberSecurity Insiders

JUNE 29, 2023

Executive summary Credential harvesting is a technique that hackers use to gain unauthorized access to legitimate credentials using a variety of strategies, tactics, and techniques such as phishing and DNS poisoning. According to recent research , phishing assaults targeted credential harvesting in 71.5% of cases in 2020.

Phishing 85

Phishing Authentication Cyber threats DNS 85

Security Affairs

OCTOBER 25, 2019

We're investigating reports of intermittent DNS resolution errors with Route 53 & our external DNS providers. According to the company status page, hackers were targeting the AWS DNS servers flooding them with junk network traffic. “We are investigating reports of occasional DNS resolution errors.

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DDOS DNS Advertising Engineering 50

eSecurity Planet

FEBRUARY 19, 2024

The problem: Microsoft patched 73 vulnerabilities in its most recent Patch Tuesday event, which occurs every month. February 19, 2024 ExpressVPN Split Tunneling Disabled after Discovered Vulnerability Type of vulnerability: DNS traffic leak.

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VPN DNS Ransomware Software 98

SecureList

OCTOBER 18, 2021

As in the older DanBot instances, both variants supported similar custom C&C protocols tunneled over DNS or HTTP. Our investigation into Lyceum has shown that the group has evolved its arsenal over the years and shifted its usage from the previously documented.NET malware to new versions, written in C++.

DNS 93

DNS Telecommunications Malware Accountability 93

Krebs on Security

MARCH 28, 2021

I’d been doxed via DNS. Here are a few of the more notable examples , although all of those events are almost a decade old. Just my Social Security number. That same list today would be pages long.

Hacking 352

Hacking Cybercrime DNS Antivirus 352

SecureList

MARCH 10, 2021

After the user starts the program, it changes the DNS settings on the device so that all domains are resolved through the attackers’ servers, which, in turn, prevent users from accessing certain antivirus sites, such as Malwarebytes.com. Distributed under the name adshield[.]pro, allusersprofile%start menuprogramsstartupflock.

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DNS Antivirus Malware Encryption 142

Duo's Security Blog

MARCH 2, 2022

The tool then surfaces suspicious authentication events for review. Trust Monitor provides deep explanatory context for each security event, not just a “risk score,” so administrators get up to speed and can remediate risk quickly.

Authentication 87

Authentication Phishing DNS Passwords 87

Security Boulevard

DECEMBER 5, 2022

In terms of work I'm currently acting as a DNS Threat Researcher at WhoisXML API where the pleasure to personally thank the team and the CEO for bringing me on board is all mine where my primary responsibilities include the production of white papers on the topic of cybercrime and general cybercrime and threat actor type of research.

Cybercrime 52

Cybercrime DNS Accountability Marketing 52

Security Boulevard

NOVEMBER 7, 2021

The standard Windows "Event Viewer" application can load these log files to help you view them. When inserting a USB drive to create the disk image, these event files will be updated and written to that disk before the image was taken. Thus, we can see in the event files all the events that happen right before the disk image happens.

Internet 98

Internet Internet Hacking Accountability 98

The Last Watchdog

JULY 1, 2019

NormShield found that all of the 2020 presidential hopefuls, thus far, are making sure their campaigns are current on software patching, as well as Domain Name System (DNS) security; and several are doing much more. Beyond Simple Passwords : Provides detailed information on keeping strong passwords and deploying two-factor authentication.

Cyber Risk 159

Cyber Risk DNS Phishing Backups 159

Security Boulevard

MAY 17, 2023

Most of these steps could’ve been blocked with the aid of DNS protection. More importantly, businesses need to understand how the event could (and should) have been protected against to be able to avoid the same fate. There are still many opportunities to thwart an attack at the DNS level.

Data breaches 52

Data breaches DNS Malware Phishing 52

Google Security

MAY 25, 2023

Sites already using ACME can configure multiple ACME providers to increase resilience during CA outages or mass renewal events. However, domain control validation methods can be vulnerable to attacks such as DNS cache poisoning and Border Gateway Protocol (BGP) hijacking.

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Encryption Internet Internet DNS 91