Krebs on Security

MARCH 9, 2021

Top of the heap this month (apart from the ongoing, global Exchange Server mass-compromise ) is a patch for an Internet Explorer bug that is seeing active exploitation. “We strongly encourage all organizations that rely on Internet Explorer and Microsoft Edge (EdgeHTML-Based) to apply these patches as soon as possible.”

DNS 317

DNS Internet Internet Software 317

Security Affairs

JANUARY 23, 2019

DHS has issued a notice of a CISA emergency directive urging federal agencies of improving the security of government-managed domains (i.e.gov) to prevent DNS hijacking attacks. The notice was issued by the DHS and links the emergency directive Emergency Directive 19-01 titled “Mitigate DNS Infrastructure Tampering.”.

DNS 86

DNS Government Telecommunications Advertising 86

The Last Watchdog

MARCH 28, 2019

The author of Mirai used a sledgehammer to kill a fly: the DDoS bombardment was so large that it also wiped out Dyn , a UK-based internet performance vendor. I had the chance at RSA 2019 to discuss the wider implications with Don Shin, A10 Networks’ senior product marketing manager. Here are the key takeaways: Reflective attacks.

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DDOS IoT DNS Internet 263

Krebs on Security

JANUARY 24, 2020

On December 23, 2019, unknown attackers began contacting customer support people at OpenProvider , a popular domain name registrar based in The Netherlands. 23, 2019, the e-hawk.net domain was transferred to a reseller account within OpenProvider. ” Dijkxhoorn shared records obtained from OpenProvider showing that on Dec.

DNS 266

DNS Social Engineering Engineering Accountability 266

Security Affairs

DECEMBER 24, 2019

Russia successfully disconnected from the internet. Russia’s government announced that it has successfully concluded a series of tests for its RuNet intranet aimed at country disconnection from the Internet. One of them is checking the integrity and security of the Internet as a result of external negative influences.”

Internet 79

Internet Internet DNS Surveillance 79

Krebs on Security

JANUARY 22, 2019

Experts at Cisco Talos and other security firms quickly drew parallels between the two mass spam campaigns, pointing to a significant overlap in Russia-based Internet addresses used to send the junk emails. When it was initially set up, it took advantage of two managed DNS servers assigned to it by GoDaddy — ns17.domaincontrol.com,

DNS 235

DNS Internet Internet Computers and Electronics 235

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

Krebs on Security

MARCH 31, 2020

PT Monday evening, Escrow.com’s website looked radically different: Its homepage was replaced with a crude message in plain text: The profanity-laced message left behind by whoever briefly hijacked the DNS records for escrow.com. Running a reverse DNS lookup on this 111.90.149[.]49 Image: Escrow.com.

Phishing 287

Phishing DNS Social Engineering Accountability 287

Security Affairs

SEPTEMBER 4, 2019

Cyber Defense Magazine September 2019 Edition has arrived. In addition, we’re shooting for 7x24x365 uptime as we continue to scale with improved Web App Firewalls, Content Deliver Networks (CDNs) around the Globe, Faster and More Secure DNS and CyberDefenseMagazineBackup.com up and running as an array of live mirror sites.

DNS 64

DNS Advertising Firewall Mobile 64

Krebs on Security

APRIL 4, 2024

Other Privnote phishing domains that also phoned home to the same Internet address as pirwnote[.]com com is currently selling security cameras made by the Chinese manufacturer Hikvision , via an Internet address based in Hong Kong. Searching DomainTools for domains that include both of these terms reveals pirwnote[.]com.

Phishing 216

Phishing Cryptocurrency DDOS Internet 216

Security Affairs

JANUARY 7, 2024

Between 2017 and 2019, the APT group mainly used DNS hijacking in its campaigns. Reduce the number of systems that can be reached over internet using SSH. The researchers believe that the Turkey-linked APT Sea Turtle has been active since at least 2017. Enable 2FA on all externally exposed accounts.

Media 112

Media Accountability Telecommunications Government 112

Cisco Security

MARCH 16, 2021

Hiding internet activity strengthens privacy—but also makes it easier for bad actors to infiltrate the network. In fact, 63% of threats detected by Cisco Stealthwatch in 2019 were in encrypted traffic. In this blog I’ll describe two recent privacy advances—DNS over HTTPS (DoH) and QUIC—and what we’re doing to maintain visibility.

Encryption 87

Encryption DNS Threat Detection Internet 87

Cisco Security

AUGUST 12, 2021

This requires a robust connection to the Internet (Lumen and Gigamon), firewall protection (Palo Alto Networks), segmented wireless network (Commscope Ruckus) and network full packet capture & forensics and SIEM (RSA NetWitness); with Cisco providing cloud-based security and intelligence support. DNS traffic at Record Low.

DNS 144

DNS Firewall Phishing Mobile 144

Security Affairs

DECEMBER 19, 2022

The botnet was involved in stealing users’ credentials and data, mining cryptocurrencies abusing victims’ resources, and setting up proxies to funnel other people’s internet traffic through infected machines and routers. Botnet operators use to spread the malware via cracked or pirated software and pay-per-install (PPI) schemes.

DNS 98

DNS Antivirus Cryptocurrency Software 98

Security Affairs

MARCH 20, 2020

The nation-state hackers are scanning the entire internet, in search of vulnerable webmail and Microsoft Exchange Autodiscover servers that expose TCP ports 445 and 1433. In May 2019, the experts noticed that the group started using hacked email addresses of numerous high-profile targets to send credential spam messages.

Phishing 135

Phishing Accountability Advertising DNS 135

Security Affairs

JULY 13, 2019

The campaign uncovered by Avast aimed at silently modifying the Brazilian users’ Domain Name System (DNS) settings to redirect victims to malicious websites mimicking legitimate ones. In some cases the router is reconfigured to use rogue DNS servers, which redirect victims to phishing pages that closely look like real online banking sites.

DNS 73

DNS Passwords Advertising Banking 73

Security Boulevard

MAY 10, 2023

It was the summer of 2019, and I spent an hour walking around downtown Los Altos in Silicon Valley with a serial entrepreneur and investor. By utilizing unique and bespoke data, assembled and correlated in the right way, HYAS has actually created the most effective Protective DNS solution on the planet.

DNS 69

DNS CISO Architecture Data privacy 69

Security Affairs

AUGUST 20, 2021

Mozi is an IoT botnet that borrows the code from Mirai variants and the Gafgyt malware , it appeared on the threat landscape in late 2019. According to the researchers, in the last months of 2019, the botnet was mainly involved in DDoS attacks. .”

IoT 103

IoT DNS Manufacturing Firmware 103

Security Affairs

OCTOBER 28, 2020

Microsoft announced to have taken down 62 of the original 69 TrickBot C&C servers, seven servers that could not be brought down last week were Internet of Things (IoT) devices. At the end of 2019, researchers spotted a new TrickBot backdoor framework dubbed Anchor that was using the DNS protocol for C2 communications.

DNS 103

DNS Banking Advertising IoT 103

Security Affairs

JULY 30, 2019

Even a device that is reaching outbound to the internet could be attacked and taken over. “ According to Shodan , there are over 808K SonicWall firewalls connected to the Internet, representing a similar number of networks that these devices defend.” ” reads the report published by Armis Labs.

Risk 71

Risk IoT Firewall DNS 71

Security Affairs

OCTOBER 5, 2020

The experts are monitoring the Mirai-based botnet since November 2019 and observed it exploiting two Tenda router 0-day vulnerabilities to spread a Remote Access Trojan (RAT). ” When the botnet was first detected in 2019, experts noticed it was exploiting the Tenda zero-day flaw tracked as CVE-2020-10987.

IoT 138

IoT Firmware DNS Advertising 138

CyberSecurity Insiders

DECEMBER 21, 2022

ESG Research says 69% of organizations have suffered a cyberattack that began with the exploitation of an unknown, unmanaged, or misconfigured internet-facing asset. While these aren’t generally the most critical assets, if these are exposed to the internet, they are easily available to attack by threat actors. What can be done.

Internet 131

Internet Internet Risk DNS 131

Security Affairs

OCTOBER 29, 2020

In early 2019, researchers spotted a new TrickBot backdoor framework dubbed Anchor that was using the anchor_dns tool for abusing the DNS protocol for C2 communications. TrickBot is a popular banking Trojan that has been around since October 2016, its authors have continuously upgraded it by implementing new features.

Healthcare 143

Healthcare Ransomware Cybercrime Advertising 143

Security Affairs

JULY 15, 2020

on the CVSS scale and affects Windows Server versions 2003 to 2019. Today we released an update for CVE-2020-1350 , a Critical Remote Code Execution (RCE) vulnerability in Windows DNS Server that is classified as a ‘wormable’ vulnerability and has a CVSS base score of 10.0. Non-Microsoft DNS Servers are not affected.”

DNS 59

DNS Advertising Engineering Internet 59

Krebs on Security

JULY 18, 2022

For the past seven years, an online service known as 911 has sold access to hundreds of thousands of Microsoft Windows computers daily, allowing customers to route their Internet traffic through PCs in virtually any country or city around the globe — but predominantly in the United States. THE INTERNET NEVER FORGETS.

VPN 304

VPN Computers and Electronics Antivirus Software 304

Krebs on Security

NOVEMBER 21, 2020

2019 that wasn’t discovered until April 2020. “This gave the actor the ability to change DNS records and in turn, take control of a number of internal email accounts. . “This gave the actor the ability to change DNS records and in turn, take control of a number of internal email accounts.

Cryptocurrency 363

Cryptocurrency VPN Scams Social Engineering 363

Krebs on Security

FEBRUARY 24, 2023

BitSight researchers found significant overlap in the Internet addresses used by those domains and a domain called BHproxies[.]com. The only experience listed for Khafagy prior to the TikTok job is labeled “Marketing” at “Confidential,” from February 2014 to October 2019. million from private investors.

Accountability 229

Accountability Advertising Marketing Malware 229

Google Security

MAY 25, 2023

Their technical expertise guarantees they'll be able to scale to meet the needs of an increasingly encrypted Internet," says Matthew Prince, CEO, Cloudflare. ARI is an Internet Engineering Task Force (IETF) Internet Draft authored by Let’s Encrypt as an extension to the ACME protocol.

Encryption 90

Encryption Internet Internet DNS 90

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. Figure 19-Generic ransomware detection.

Ransomware 140

Ransomware DNS Encryption Backups 140

Security Affairs

JULY 27, 2020

In December 2018, security experts from Trend Micro discovered that some machine-to-machine (M2M) protocols can be abused to attack IoT and industrial Internet of Things (IIoT) systems. According to our estimate, CoAP can reach up to 32 times (32x) amplification factor, which is roughly between the amplification power of DNS and SSDP.”.

DDOS 109

DDOS IoT Internet Internet 109

Security Affairs

NOVEMBER 1, 2021

The number of infected devices is impressive, on 2019-11-30 a trusted security partner in the US informed Qihoo 360’s Netlab Cybersecurity reported to have observed 1,962,308 unique daily active IPs from the Pink botnet targeting its systems. According to the experts, Pink is the largest botnet they have observed in the last six years.

Architecture 122

Architecture DDOS Advertising Firmware 122

Security Affairs

DECEMBER 12, 2019

. “To compromise targeted networks, GALLIUM target unpatched internet-facing services using publicly available exploits and have been known to target vulnerabilities in WildFly/JBoss.” ” The GALLIUM threat actor is active, but its activity was more intense between 2018 and mid-2019. ” continues the analysis.

Telecommunications 66

Telecommunications DNS Malware Advertising 66

Security Affairs

DECEMBER 18, 2019

The Momentum bot achieves persistence by modifying the ‘ rc’ files, then connect to command and control (C&C) server and to an internet relay chat (IRC) channel called #HellRoom to register itself and accept commands. The C&C servers were live as recently as November 18 2019.” ” concludes the analysis.

Malware 62

Malware DDOS DNS Advertising 62

Security Affairs

SEPTEMBER 8, 2019

Cisco addresses CVE-2019-12643 critical flaw in virtual Service Container for IOS XE. Cyber Defense Magazine – September 2019 has arrived. Some Zyxel devices can be hacked via DNS requests. CVE-2019-15846 Exim mail server flaw allows Remote Code Execution. Once again thank you!

IoT 74

IoT Data breaches DNS Advertising 74

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. To do so, it performs a DNS request to don-dns[.]com

Cryptocurrency 77

Cryptocurrency DNS Malware Encryption 77

Security Affairs

AUGUST 19, 2019

It allows users using web browsers to set up user accounts, Apache, DNS, file sharing and much more. News of the day is that Webmin contained a remote code execution vulnerability, tracked as CVE-2019-15107, for more than a year. ehakkus) August 11, 2019. Only version 1.890 is affected also in the default configuration.

Passwords 79

Passwords System Administration Advertising DNS 79

Security Affairs

NOVEMBER 21, 2019

“Fast forwarded to October 11, 2019, our Anglerfish honeypot captured another suspicious ELF sample, and it turned out to be the Downloader of the previous suspicious ELF sample.” It allows users using web browsers to set up user accounts, Apache, DNS, file sharing and much more.

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DDOS System Administration Advertising DNS 80