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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Google Security

MARCH 28, 2024

Tianhao Chi and Puneet Sood, Google Public DNS The Domain Name System (DNS) is a fundamental protocol used on the Internet to translate human-readable domain names (e.g., When a user enters a domain name in their browser, the DNS resolver (e.g. Google Public DNS). www.example.com) into numeric IP addresses (e.g.,

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eSecurity Planet

MAY 24, 2023

At a high level, DKIM enables an organization to provide encryption hash values for key parts of an email. Using public-private encryption key pairs, receiving email servers can compare the received email hash value against the received hash value to validate if any alterations took place in transit.

Technology 86

Technology DNS Encryption Authentication 86

Troy Hunt

NOVEMBER 25, 2020

— Troy Hunt (@troyhunt) November 23, 2020 Clearly it was never TP-Link's intention for people to use their plugs in the fashion HA presently is and I'll talk more about why HA does this in the next section of this post. For some reason, the Shelly on my garage door is making a DNS request for api.shelly.cloud once every second!

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Security Affairs

DECEMBER 24, 2018

The communications are not encrypted, however the WiFi password is sent encrypted during set up (albeit trivial to decrypt).” “As the communications are not encrypted, it is simple to Man-in-the-Middle the traffic and analyse the API.” ” reads the analysis published by MWR InfoSecurity.

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Security Affairs

AUGUST 10, 2020

Pavel explained that attackers could also collect information even when the traffic is encrypted. The analysis of DNS could reveal the user’s Internet browsing history while the analysis of TLS certificates could allow fingerprinting the servers the user connected. ” reads the notification published by the FBI. “The

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Internet Internet Advertising Encryption 139

Security Affairs

JULY 14, 2021

We have observed malicious binaries use openssl with base64, Advanced Encryption Standard (AES), CBC (Cipher Block Chaining) to thwart security scanners in the format as shown below: openssl enc -aes-256-cbc -d -A -base64 -pass pass:<> Curl. Bash scripts invoking encrypted Zip file. Bash scripts decoding an encrypted blob.

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Krebs on Security

FEBRUARY 24, 2023

The Mylobot malware includes more than 1,000 hard-coded and encrypted domain names, any one of which can be registered and used as control networks for the infected hosts. 5, 2014 , but historic DNS records show BHproxies[.]com “This number is probably higher, but we don’t have a full visibility of the botnet. com on Mar.

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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

Troy Hunt

JANUARY 10, 2018

To be crystal clear, none of this is "hacking", it will merely involve looking at how the system responds to legitimate requests and observing the gap between what it does at present and what it ideally should do. Geo-Blocking is (Almost) Useless. A little context first: the Aadhaar website runs over at uidai.gov.in

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Hacking Government Encryption Risk 278

Cisco Security

NOVEMBER 29, 2021

Cisco Secure supports the NOC operations with DNS visibility and architecture intelligence ( Cisco Umbrella and Cisco Umbrella Investigate ) and automated malware analysis and threat intelligence ( Cisco Secure Malware Analytics (Threat Grid) , backed by Cisco Talos Intelligence and Cisco SecureX ). The other half is Clarity for iOS.

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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.

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Security Affairs

OCTOBER 20, 2021

” The MSI package first removes registry keys associated with the old Purple Fox installations if any are present, then it replaces the components of the malware with new ones. . “The goal is to install the MSI package as an admin without any user interaction.” ” continues the analysis.

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Encryption DNS Architecture Firewall 122

NetSpi Technical

OCTOBER 19, 2023

Here I present a quick overview of this functionality and some ways it may be used. 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.

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DNS Internet Internet Phishing 97

eSecurity Planet

MAY 28, 2021

We look at three RSAC 2021 sessions and some of the most daunting vulnerabilities presented by the SANS Institute, Cybersecurity and Infrastructure Security Agency (CISA), and Varonis Systems. The SANS Institute presentation, “ The Five Most Dangerous New Attack Techniques ,” is an RSAC staple by this point.

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Malwarebytes

MAY 12, 2021

Receivers are not required to check whether every fragment that belongs to the same frame is encrypted with the same key and will reassemble fragments that were decrypted using different keys. CVE-2020-24587 : Mixed key attack (reassembling fragments encrypted under different keys). reassembling mixed encrypted/plaintext fragments.

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Malwarebytes

SEPTEMBER 14, 2022

Don’t both of these mitigate being compromised, since the vulnerability is already technically present? 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. The DNS server, in turn, tells the computer where to go.

Technology 88

Technology DNS Cyber Insurance Insurance 88

Security Affairs

JULY 23, 2019

Attackers also noticed that systems infected with the above two families were also targeted with the RoyalDNS malware that uses DNS to communicate with the C&C server. Once executed the command the backdoor returns output through DNS. “The Ke3chang APT group (a.k.a.

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DNS Malware Advertising Manufacturing 110

SecureList

OCTOBER 25, 2023

It comes equipped with a built-in TOR network tunnel for communication with command servers, along with update and delivery functionality through trusted services such as GitLab, GitHub, and Bitbucket, all using custom encrypted archives. The action of these tasks is run of PowerShell loader script.

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Security Affairs

JULY 11, 2022

Figure 2 presents an example of an SMS sent to Internet end-users during the ANUBIS social engineering wave. Operators can easily make this configuration through an interface that uses the CloudFlare API for configuring new DNS zones. As observed, criminals are using the Let’s Encrypt CA to create valid HTTPs certificates.

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Phishing Social Engineering Banking Engineering 106

eSecurity Planet

MAY 23, 2023

SPF deploys within the Domain Name Service (DNS) records with the organization’s domain hosting provider. Email-receiving servers check the email header for the sending domain and then perform a DNS lookup to see if an SPF file exists that matches the sending domain.

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DNS Phishing Authentication Internet 91

SecureWorld News

SEPTEMBER 7, 2023

"Preparing for a Post-Quantum World" is the topic of a panel presentation at SecureWorld Denver on September 19, and with good reason. Quantum computing poses a potential threat to current cybersecurity practices, which are based on encryption algorithms that can be broken by quantum computers.

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Encryption Technology Risk Architecture 99

Security Affairs

FEBRUARY 19, 2019

Step-by-step of Muncy malware is presented in Figure 4. Furthermore, the digital certificate presents within this executable also contribute to the high entropy in the.text section. We can easily observe that in the file overlay offsets presented below. An encrypted snippet of code, for instance, has high entropy associated.

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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. From 2018 to present, Aoqin Dragon has also been observed using a fake removable device as an initial infection vector. The APT has improved its malicious code over the time to avoid detection.

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Malware DNS Encryption Education 98

SecureList

JUNE 2, 2022

On January 27, we delivered a joint presentation with TeamT5 and ITOCHU Corporation at Japan Security Analyst Conference (JSAC) to provide an update on the actor’s latest activities. Layout of the encrypted data. Packets exchanged with the C2 server contain a header (described in the next table) followed by AES-encrypted data.

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SecureList

SEPTEMBER 21, 2023

Brute-force attacks on services that use SSH, a more advanced protocol that encrypts traffic, can yield similar outcomes. User files were encrypted, with the device’s interface displaying a ransom note demanding payment of 0.03 DNS changer Malicious actors may use IoT devices to target users who connect to them.

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eSecurity Planet

MARCH 25, 2022

Recent years presented a torrent of research showing how vulnerable RDP systems are for organizations not taking additional cybersecurity precautions. By exploiting weak server vulnerabilities, the Iran-based hackers were able to gain access, move laterally, encrypt IT systems, and demand ransom payment.

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Security Affairs

DECEMBER 7, 2019

Back to the present, the threat intelligence firm Anomali reported a new wave of attacks that started in Mid-October 2019 and that targeted individuals and entities in Ukraine, including diplomats, government officials and employees, journalists, law enforcement, military officials and personnel, NGOs, and the Ministry of Foreign Affairs.

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Government Advertising Media DNS 89

McAfee

SEPTEMBER 14, 2021

The PlugX families we observed used DNS [ T1071.001 ] [ T1071.004 ] as the transport channel for C2 traffic, in particular TXT queries. Another clue that helped us was the use of DNS tunneling by Winnti which we discovered traces of in memory. The hardcoded 208.67.222.222 resolves to a legitimate OpenDNS DNS server.

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eSecurity Planet

JULY 28, 2021

If a blockchain user completes a transaction via a web browser, they could unknowingly be presenting sensitive details to a browser hijacker or keylogger. Since the 1970s, Public Key Infrastructure (PKI) has offered encryption , authentication, bootstrapping, and digital signatures to secure digital communications.

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eSecurity Planet

MAY 2, 2024

50,000 DDoS attacks on public domain name service (DNS) resolvers. 553% increase in DNS Flood attacks from 1H 2020 to 2H 2023. DDoS attacks on single networks or websites render them unavailable, but DDoS attacks on DNS resolvers bring down all networks and websites using that DNS resource.

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Security Affairs

AUGUST 7, 2019

Security researcher Marco Ramilli presents a comparative analysis of attacks techniques adopted by the Iran-Linked OilRig APT group. T1094) mainly developed using DNS resolutions (which is actually one of the main characteristic of the attacker group). and more personal thoughts.

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SecureList

JANUARY 13, 2022

If the document was opened offline or the remote content was blocked, it presents some legitimate content, likely scraped or stolen from another party. After sending a beacon to the C2 server, the malware collects general system information, sending it after AES encryption. ecf75bec770edcd89a3c16d3c4edde1a Abies VC Presentation (1).docx.

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Cryptocurrency Malware Accountability Banking 143

eSecurity Planet

JUNE 8, 2023

We will present these options in two categories: a priority tier and an advanced capability tier. It can be time consuming to establish these protocols on an organization’s DNS servers, but doing so will provide two key benefits.

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Firewall DNS Authentication Malware 72

Security Boulevard

JANUARY 17, 2024

Payload Ingress When delivering payloads to clients through RBI solutions, these solutions’ sandboxing and scanning capabilities present significant hurdles that must be overcome to achieve code execution in your target environment. This can be due to encryption or even size. We can swap our delivery vector to a ISO image file (.iso

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SecureList

MAY 23, 2023

Code snippet used to generate the BOT_ID The resulting BOT_ID is used also to initialize the DES key and IV, which are then used to encrypt communication with the C2. The three values are compressed with GZIP, encrypted with DES, and encoded with base64. This logic is described in the code snippet below, taken from the malware.

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SecureList

JUNE 3, 2024

In late December, in a presentation at the 37th Chaos Communication Congress (37C3), experts from our Global Research and Analysis Team (GReAT) described the attack chain in detail , including – for the first time – how the attackers exploited the CVE-2023-38606 hardware vulnerability.

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Banking Malware Computers and Electronics Mobile 115