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. TLS and HTTPS inherently create secured and encrypted sessions for communication.

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DNS DDOS Firewall Architecture 113

Security Boulevard

JUNE 19, 2024

DNS enables the easy navigation from website to website as you currently know it. Many DNS resolvers - such as your internet service provider's (ISP) - do not encrypt queries and may log data and metadata surrounding your queries. This post aims to explore how and why - and doesn't leave out the limitations of encrypted DNS.

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DNS Encryption Firmware Internet 69

Cisco Security

MARCH 16, 2021

In fact, 63% of threats detected by Cisco Stealthwatch in 2019 were in encrypted traffic. The European Union is concerned enough that it drafted a resolution in November 2020 to ban end-to-end encryption, prompting outcry from privacy advocates. Keeping your destination private: DNS over HTTPS.

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Encryption DNS Threat Detection Internet 119

SecureList

NOVEMBER 6, 2024

It also uses stealer malware to extract the victim’s credit card data as well as details about the infected device. Technical Details Background In August 2024, we stumbled upon a massive infection caused by an unknown bundle consisting of miner and stealer malware. SteelFox.gen , Trojan.Win64.SteelFox.*. SteelFox.*.

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Software Cryptocurrency Malware DNS 124

Security Affairs

APRIL 24, 2024

A malware campaign has been exploiting the updating mechanism of the eScan antivirus to distribute backdoors and cryptocurrency miners. Avast researchers discovered and analyzed a malware campaign that exploited the update mechanism of the eScan antivirus to distribute backdoors and crypto miners.

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Antivirus Malware DNS Cryptocurrency 131

The Last Watchdog

JUNE 1, 2021

The attackers can also use it for installing malware programs on the victim’s system. The Pharming attacks are carried out by modifying the settings on the victim’s system or compromising the DNS server. In this method of manipulating DNS, the attackers infiltrate the victim’s device and change the local host file.

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DNS Phishing Social Engineering Cyber Attacks 214

Malwarebytes

JUNE 1, 2022

That’s where DNS filtering comes in. But first, DNS in a nutshell. So normally, every time your customer types in your web address, their computer makes a request to a DNS server. The DNS server, in turn, tells the computer where to go. But which web-based cyberthreats in particular does DNS filtering stop, you ask?

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DNS DDOS Phishing Spyware 98

Security Boulevard

MAY 20, 2022

What Is DNS Spoofing and How Is It Prevented? What Is the DNS and DNS Server? . To fully understand DNS spoofing, it’s important to understand DNS and DNS servers. The DNS “domain name system” is then what translates the domain name into the right IP address. What Is DNS Spoofing? .

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DNS Cyber Attacks Encryption Risk 98

Security Affairs

DECEMBER 27, 2024

The script uses various methods like “wget,” “ftpget,” “curl,” and “tftp” to download the malware. It first terminates processes with the same file extension as “FICORA” and then downloads and executes the malware targeting multiple Linux architectures.

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Architecture Malware DNS DDOS 70

SecureList

APRIL 25, 2025

While external malware now faces greater permission restrictions, pre-installed malware within system partitions has become impossible to remove. The modular architecture of the malware gives attackers virtually unlimited control over the system, enabling them to tailor functionality to specific applications.

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Malware Cryptocurrency Firmware Accountability 85

Security Affairs

FEBRUARY 5, 2021

The TeamTNT hacker group has been employing a new piece of malware, dubbed Hildegard, to target Kubernetes installs. The hacking group TeamTNT has been employing a new piece of malware, dubbed Hildegard, in a series of attacks targeting Kubernetes systems. The malware deploys the XMRig mining tool to mine Monero cryptocurrency.

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Malware DNS Cryptocurrency Internet 120

Security Affairs

MARCH 3, 2024

The recent sample of Linux variants of BIFROSE employes RC4 encryption to encrypt the collected victim data. The researchers observed the malware trying to contact a Taiwan-based public DNS resolver with the IP address 168.95.1[.]1. com by using the public DNS resolver at 168.95[.]1.1. ” concludes the report.

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DNS Malware Encryption Hacking 140

Krebs on Security

MARCH 28, 2021

New data suggests someone has compromised more than 21,000 Microsoft Exchange Server email systems worldwide and infected them with malware that invokes both KrebsOnSecurity and Yours Truly by name. I’d been doxed via DNS. Let’s just get this out of the way right now: It wasn’t me. krebsonsecurity[.]top

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Hacking Cybercrime DNS Internet 363

Security Affairs

JANUARY 19, 2025

CISA adds Aviatrix Controllers vulnerability to its Known Exploited Vulnerabilities catalog ESET detailed a flaw that could allow a bypass of the Secure Boot in UEFI systems Russia-linked APT Star Blizzard targets WhatsApp accounts Prominent US law firm Wolf Haldenstein disclosed a data breach Clop Ransomware exploits Cleo File Transfer flaw: dozens (..)

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Spyware Data breaches DNS Artificial Intelligence 70

Security Affairs

AUGUST 31, 2022

A malware campaign tracked as GO#WEBBFUSCATOR used an image taken from NASA’s James Webb Space Telescope (JWST) as a lure. Securonix Threat researchers uncovered a persistent Golang-based malware campaign tracked as GO#WEBBFUSCATOR that leveraged the deep field image taken from the James Webb telescope. Pierluigi Paganini.

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Malware DNS Antivirus Encryption 98

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.

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DNS Malware Social Engineering Engineering 69

Security Boulevard

APRIL 8, 2025

Encryption Technologies: Encryption protects data confidentiality and integrity, but attackers also use it to conceal malware, establish encrypted communication channels, and secure stolen data. However, defenders use the cloud to implement security measures, such as IAM controls and encryption.

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Cybersecurity Penetration Testing DNS Encryption 52

SecureList

JUNE 1, 2023

Forensic methodology It is important to note, that, although the malware includes portions of code dedicated specifically to clear the traces of compromise, it is possible to reliably identify if the device was compromised. Typical netflow data for the C&C sessions will show network sessions with significant amount of outgoing traffic.

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Malware Backups Mobile DNS 145

SecureList

DECEMBER 18, 2020

For instance, before making the first internet connection to its C2s, the Sunburst malware lies dormant for a long period, of up to two weeks, which prevents an easy detection of this behavior in sandboxes. In the initial phases, the Sunburst malware talks to the C&C server by sending encoded DNS requests. avsvmcloud[.]com”

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DNS Telecommunications Malware Encryption 76

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.

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Ransomware DNS Encryption Backups 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.

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DNS Encryption Firewall Network Security 99

Security Affairs

JULY 5, 2024

Unique features include multiple DNS resolution methods, prioritizing DNS over HTTPS ( DoH ) for command and control (C2) resolution, and using the uncommon Smux library for C2 communication, encrypted via XOR The analysis revealed that Zergeca’s C2 IP address, 84[.]54.51.82, ” concludes.

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DDOS DNS Encryption Malware 138

Security Affairs

FEBRUARY 23, 2019

A user reported that its D-Link DNS-320 device was infected by malicious code. The D-Link DNS-320 model is no more available for sale, one of the members of the forum explained that the firmware of its NAS was never updated and its device was exposed to WAN through ports 8080, FTP port 21, and a range of ports for port forwarding.

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Ransomware DNS Firmware Encryption 111

CyberSecurity Insiders

FEBRUARY 16, 2023

So, to avoid such troubles from file encrypting malware, the following are the steps to follow to protect backups from being corrupted with encryption- Update- It is a known fact that back-up systems are the first to receive OS updates and so admins should subscribe to automatic updates for backup software.

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Backups Ransomware DNS Encryption 116

SecureList

MARCH 10, 2021

Back then, cybercriminals distributed malware under the guise of the Malwarebytes antivirus installer. In the latest campaign, we have seen several apps impersonated by the malware: the ad blockers AdShield and Netshield, as well as the OpenDNS service. Updater.exe code snippet containing the encrypted address. transmissionbt[.]org.

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DNS Antivirus Malware Encryption 145

Security Affairs

FEBRUARY 12, 2024

Public Wi-Fi users are prime targets for MITM attacks because the information they send is often not encrypted, meaning it’s easy for hackers to access your data. Look for the “https” in the website’s URL—it means there’s some level of encryption.

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DNS VPN Encryption Passwords 143

Security Affairs

FEBRUARY 19, 2019

Over the last few days, a phishing campaign from DHL and entitled “ DHL Shipment Notification ” has been targeted users worldwide distribution the Muncy malware. Now, the malware is targeting user’s worldwide and has been spread via phishing campaigns. The process flow diagram below shown how the malware works.

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Malware Phishing DNS Engineering 103

Security Affairs

JANUARY 20, 2022

Diavol encrypts files solely using an RSA encryption key, and its code is capable of prioritizing file types to encrypt based on a pre-configured list of extensions defined by the attacker. Operators continue to offer the botnet through a multi-purpose malware-as-a-service (MaaS) model. ” continues the report.

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Ransomware Banking Malware Encryption 130

Security Affairs

NOVEMBER 5, 2021

Over the past months, other ransomware gangs, including Conti and Lockfile , exploited ProxyShell flaws to deliver their malware. It also deletes volume shadow service (VSS) snapshots from the server using vssadmin utility to make sure the encrypted files cannot be restored from their VSS copies. Pierluigi Paganini.

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Ransomware Backups Encryption DNS 145

Fox IT

JUNE 29, 2022

Flubot is an Android based malware that has been distributed in the past 1.5 An important part of the popularity of Flubot is due to the distribution strategy used in its campaigns, since it has been using the infected devices to send text messages, luring new victims into installing the malware from a fake website. Introduction.

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Banking Malware DNS Encryption 97

Security Affairs

DECEMBER 5, 2020

The backdoor uses multiple tricks to evade detection and leverages DNS over HTTPS (DoH) to communicate with its C2 server, using Cloudflare responders. Once executed the command, the malware the malicious code sends back command execution results. “On

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DNS Phishing Encryption Antivirus 123

Hacker Combat

JULY 5, 2021

Further, it also matches the two variants in how the malware executes file encryption and secures command-line disputes. Similar to FiveHands, the new malicious software utilizes a practicable packer and leverages a value key to decodes its malware payload to create a memory. It also uses the command line reversal “-key.”

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Ransomware DNS Software Encryption 133

Fox IT

AUGUST 11, 2022

A recently uncovered malware sample dubbed ‘Saitama’ was uncovered by security firm Malwarebytes in a weaponized document, possibly targeted towards the Jordan government. This Saitama implant uses DNS as its sole Command and Control channel and utilizes long sleep times and (sub)domain randomization to evade detection. Introduction.

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DNS Engineering Malware Encryption 66

Security Affairs

JUNE 20, 2024

In a recent espionage campaign, the attackers employed custom malware associated with several Chinese APT groups. Some of the malware used by the threat actors are: Coolclient : A backdoor linked to the Fireant group (also known as Mustang Panda or Earth Preta). It logs keystrokes, manages files, and communicates with a C2 server.

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DNS Malware Media Encryption 136

SecureList

SEPTEMBER 29, 2021

The first malicious update was pushed to SolarWinds users in March 2020, and it contained a malware named Sunburst. One month later, we discovered interesting similarities between Sunburst and Kazuar , another malware family linked to Turla by Palo Alto. DNS hijacking. December 28, 2020 to January 13, 2021. mail.invest.

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DNS Malware Engineering Encryption 142

Fox IT

SEPTEMBER 25, 2024

And how can malware be future-proofed to evade the sophisticated EDR systems that currently exist and are actively being developed? Malware authors need to take execution speed, or other system changes, into account when deploying malware. compression or encryption).

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Malware Engineering Encryption Antivirus 138

SecureList

OCTOBER 25, 2023

Introduction It’s just another cryptocurrency miner… Nobody would even suspect the mining malware was merely a mask, masquerading behind an intricate modular framework that supports both Linux and Windows. This malware employed a custom EternalBlue SMBv1 exploit to infiltrate its victims’ systems.

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Malware DNS Encryption Ransomware 145