Security Affairs

SEPTEMBER 19, 2020

The popular encrypted email service Tutanota was hit with a series of DDoS attacks this week targeting its website fist and its DNS providers later. Encrypted email service, Tutanota suffered a series of DDoS attacks that initially targeted the website and later its DNS providers. ” continues the post.

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DDOS Encryption DNS Advertising 141

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.

Encryption 85

Encryption DNS Threat Detection Internet 85

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.

Malware 86

Malware DNS Antivirus Encryption 86

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.

DNS 66

DNS Engineering Malware Encryption 66

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”

DNS 74

DNS Telecommunications Malware Encryption 74

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 124

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.

DNS 210

DNS Phishing Social Engineering Cyber Attacks 210

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

Krebs on Security

FEBRUARY 4, 2019

But several more recent malware spam campaigns suggest GoDaddy’s fix hasn’t gone far enough, and that scammers likely still have a sizable arsenal of hijacked GoDaddy domains at their disposal. The domains documented by MyOnlineSecurity all had their DNS records altered between Jan. 31 and Feb. Image: Farsight Security.

DNS 233

DNS Ransomware Accountability Internet 233

Malwarebytes

JUNE 15, 2022

Symbiote, a new “nearly impossible to detect” Linux malware, targeted financial sectors in Latin America—and the threat actors behind it might have links to Brazil. And this is what sets Symbiote apart from other Linux malware. The credentials are first encrypted with RC4 using an embedded key, and then written to a file.

Malware 61

Malware DNS Banking Engineering 61

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

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 82

DNS Internet Internet Encryption 82

SecureList

JANUARY 22, 2024

We recently caught sight of a new, hitherto unknown, macOS malware family that was piggybacking on cracked software. A downloader A completed “patching” kicked off the main payload, with the sample reaching out to its C2 for an encrypted script. The ciphertext was AES -encrypted in CBC mode.

Software 102

Software DNS Computers and Electronics Malware 102

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 126

Ransomware DNS Encryption Backups 126

Cisco Security

NOVEMBER 3, 2022

Cisco provided automated malware analysis, threat intelligence, DNS visibility and Intrusion Detection; brought together with SecureX. The findings report addresses several security topics, including: Encrypted vs. Unencrypted network traffic. Malware Analysis, through the NetWitness® integration. Voice over IP.

Wireless 67

Wireless DNS Education Encryption 67

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.

Malware 107

Malware DNS Encryption Cryptocurrency 107

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 110

Malwarebytes

JULY 26, 2022

Part 1: Your data has been encrypted! Part 1: Your data has been encrypted! As you can see, our files have in fact been encrypted by the ransomware across multiple directories with the “ encrypt ” extension. Let’s start a ping to Google’s DNS server. encrypted versions of the same file. .

Encryption 65

Encryption Ransomware Backups Firewall 65

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 132

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.

DNS 142

DNS Antivirus Malware Encryption 142

SecureList

JUNE 5, 2023

Satacom downloader, also known as LegionLoader, is a renowned malware family that emerged in 2019. It is known to use the technique of querying DNS servers to obtain the base64-encoded URL in order to receive the next stage of another malware family currently distributed by Satacom.

Cryptocurrency 78

Cryptocurrency DNS Malware Encryption 78

Security Affairs

FEBRUARY 18, 2024

Ukrainian national faces up to 20 years in prison for his role in Zeus, IcedID malware schemes CISA: Cisco ASA/FTD bug CVE-2020-3259 exploited in ransomware attacks CISA adds Microsoft Exchange and Cisco ASA and FTD bugs to its Known Exploited Vulnerabilities catalog US gov offers a reward of up to $10M for info on ALPHV/Blackcat gang leaders U.S.

Cybercrime 97

Cybercrime Ransomware Malware Data breaches 97

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 127

eSecurity Planet

JULY 25, 2022

The domain name system (DNS) is basically a directory of addresses for the internet. Your browser uses DNS to find the IP for a specific service. For example, when you enter esecurityplanet.com, the browser queries a DNS service to reach the matching servers, but it’s also used when you send an email. DNS spoofing or poisoning.

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DNS Penetration Testing Encryption Architecture 131

Malwarebytes

JANUARY 22, 2024

The group uses social engineering techniques to persuade their targets to open documents or download malware. These lure documents, which are harmless PDF files, are sent to the target, but when they open them the content appears to be encrypted. This backdoor is custom malware, likely developed by or for Coldriver, called Spica.

Social Engineering 91

Social Engineering Government Media DNS 91

Security Affairs

AUGUST 18, 2021

However, Fortinet researchers that analyzed the malware discovered that ransomware operators have yet to implement data-stealing capabilities. The comparison of the two versions allowed the researchers to get insight into the development process of Diavol and of future versions of the malware. reads the analysis published by Fortinet.

Ransomware 100

Ransomware DNS Cybercrime Malware 100

Webroot

SEPTEMBER 7, 2023

Depending on the size of the business, one-third to two-thirds of businesses suffer malware attacks in any given year. Tools like Webroot’s Advanced Email Threat Protection analyze the links and attachments in messages to detect malware and keep your systems secure against threats. In 2022, American businesses lost $10.3

Encryption 89

Encryption Cyber Insurance Cybercrime Phishing 89

eSecurity Planet

AUGUST 8, 2022

A public key is stored with the Domain Name System (DNS) for download by any email server receiving emails with the encrypted digital signature. SPF email authentication counters spoofing by publishing to DNS records a list of email-sending Internet Protocol (IP) addresses authorized by the sending domain. What is SPF?

DNS 111

DNS Phishing Authentication Marketing 111

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.

DNS 104

DNS DDOS Firewall Architecture 104

eSecurity Planet

SEPTEMBER 17, 2021

Cobalt Strike Beacon Linux enables emulation of advanced attacks to a network over HTTP, HTTPS, or DNS. The malware has been renamed Vermilion. It’s a DNS-based communication that helps circumvent classic defense mechanisms that focus on HTTP traffic. The malware can configure the beacon automatically.

DNS 92

DNS Malware Software Security Awareness 92

SecureList

DECEMBER 1, 2023

To exfiltrate data and deliver next-stage malware, the attackers abuse cloud-based data storage, such as Dropbox or Yandex Disk, as well as a temporary file sharing service. libssl.dll or libcurl.dll was statically linked to implants to implement encrypted C2 communications. org domain. org domain did not occur in all cases.

Malware 91

Malware Ransomware Encryption Energy and Utilities 91

Security Affairs

MAY 6, 2023

Twitter confirmed that a security incident publicly exposed Circle tweets FBI seized other domains used by the shadow eBook library Z-Library WordPress Advanced Custom Fields plugin XSS exposes +2M sites to attacks Fortinet fixed two severe issues in FortiADC and FortiOS Pro-Russia group NoName took down multiple France sites, including the French (..)

Data breaches 96

Data breaches Malware Mobile Spyware 96

Security Affairs

SEPTEMBER 25, 2022

Every week the best security articles from Security Affairs free for you in your email box. If you want to also receive for free the newsletter with the international press subscribe here. gov adds more Chinese Telecom firms to the Covered List Imperva blocked a record DDoS attack with 25.3

Cryptocurrency 87

Cryptocurrency Data breaches DNS DDOS 87

Security Affairs

JANUARY 29, 2023

If you want to also receive for free the newsletter with the international press subscribe here.

DNS 89

DNS Data breaches Hacking Backups 89

Security Affairs

MAY 15, 2023

“Lancefly’s custom malware, which we have dubbed Merdoor, is a powerful backdoor that appears to have existed since 2018.” Lancefly APT used a multiple non-malware techniques for credential theft on victim machines, including: PowerShell was used to launch rundll32.exe ” reads the analysis published by Symantec.

Encryption 86

Encryption DNS Phishing Malware 86

SecureWorld News

MARCH 29, 2024

Malvertising acts as a vessel for malware propagation. Scammers and malware operators are increasingly adept at mimicking popular brands in their ad snippets, which makes it problematic for the average user to tell the wheat from the chaff. One of the biggest pitfalls with malvertising is how difficult it can be to detect.

Cybercrime 79

Cybercrime Advertising Engineering Antivirus 79

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 Antivirus 348