The Hacker News

MARCH 16, 2022

A previously undocumented backdoor has been observed targeting Linux systems with the goal of corralling the machines into a botnet and acting as a conduit for downloading and installing rootkits.

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DNS Encryption 111

Security Affairs

NOVEMBER 5, 2021

The attack chain starts with a downloader module on a victim’s server in the form of a standalone executable format and a DLL. The DLL downloader is run by the Exchange IIS worker process w3wp.exe. Attackers used a modified EfsPotato exploit to target proxyshell and PetitPotam flaws as an initial downloader.

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Ransomware Backups Encryption DNS 145

Krebs on Security

MARCH 28, 2021

Watson said the Krebsonsecurity file will attempt to open up an encrypted connection between the Exchange server and the above-mentioned IP address, and send a small amount of traffic to it each minute. But Watson said they don’t know how many of those systems also ran the secondary download from the rogue Krebsonsecurity domain.

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Hacking Cybercrime DNS Antivirus 357

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

Krebs on Security

AUGUST 23, 2024

A core part of the way these things find each other involves a Windows feature called “ DNS name devolution ,” a kind of network shorthand that makes it easier to find other computers or servers without having to specify a full, legitimate domain name for those resources. He then learned the.ad Trouble is, any organization that chose a.ad

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DNS Internet Internet Authentication 310

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 144

Security Affairs

SEPTEMBER 22, 2021

Experts noticed that database updates from Netgear are unsigned and downloaded via Hypertext Transfer Protocol (HTTP), allowing the attacker to carry out a MitM attack on the device. However, database updates from Netgear are unsigned and downloaded via Hypertext Transfer Protocol (HTTP).” ” concludes the report.

DNS 144

DNS Firmware VPN Risk 144

SecureList

DECEMBER 18, 2020

At the moment, we identified approximately ~100 customers who downloaded the trojanized package containing the Sunburst backdoor. In the initial phases, the Sunburst malware talks to the C&C server by sending encoded DNS requests. DNS CNAME request-response pairs (Copyright 2020 by FireEye, Inc.). avsvmcloud[.]com”

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DNS Telecommunications Malware Encryption 75

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. Updater.exe code snippet containing the encrypted address. Patched.netyyk. DNSChanger.aaox.

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DNS Antivirus Malware Encryption 145

Security Affairs

JUNE 18, 2020

They use DNS tunneling for stealthier C&C communications, and place execution guardrails on the malicious components to hide the malware from security researchers.” The attack chain begins with the deployment of a TCP downloader that fetches the next stage payload.

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DNS Advertising Spyware Software 131

SecureList

JANUARY 22, 2024

Next, it “patched” the downloaded app: tool compared the first 16 bytes of the modified executable with a sequence hardcoded inside Activator and removed them in the case of a match: Checking the first 16 bytes of the executable The app amusingly started working and appeared to have been cracked.

Software 138

Software Computers and Electronics DNS Malware 138

Security Affairs

JULY 14, 2021

The malicious shell scripts used by Shlayer and Bundlore are usually malvertising-focused adware bundlers using shell scripts in the kill chain to download and install an adware payload. Bash scripts invoking encrypted Zip file. Figure 4: Bash script invoking encrypted zip file. Figure 2: Fake flash player installation.

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Adware Encryption Malware Passwords 138

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. On top of the DNS C2 communication logic, PowerPepper also signals successful implant startup and execution flow errors to a Python backend, through HTTPS.

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DNS Phishing Antivirus Encryption 131

Security Affairs

AUGUST 31, 2022

The phishing emails contain a Microsoft Office attachment that includes an external reference in its metadata which downloads a malicious template file. Upon opening the document, a malicious template file is downloaded and saved on the system. jpg” that appears as an image of the First Deep Field captured by JWST is downloaded.

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Malware DNS Antivirus Encryption 98

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. These targets are approached in spear phishing attacks.

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Social Engineering Government Media DNS 132

SecureList

JUNE 1, 2023

The code within the exploit downloads several subsequent stages from the C&C server, that include additional exploits for privilege escalation. After successful exploitation, a final payload is downloaded from the C&C server, that is a fully-featured APT platform. The analysis of the final payload is not finished yet.

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Malware Backups Mobile DNS 145

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 117

Cryptocurrency DNS Malware Encryption 117

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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DNS Malware Engineering Encryption 137

Security Affairs

FEBRUARY 5, 2021

The attacker downloaded tmate and issued a command to run it and establish a reverse shell to tmate.io The malicious code also leverages other techniques to avoid detection, for example it modifies the system DNS resolvers and uses Google’s public DNS servers to bypass DNS monitoring tools. from container 1.

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Malware DNS Cryptocurrency Internet 128

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

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. org and execute PowerShell scripts. Bitbucket repository content The repository houses only a README.md

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Malware DNS Encryption Cryptocurrency 136

Security Affairs

OCTOBER 23, 2018

The new IoT malware borrows code from the Xor.DDoS and Mirai bots, it also implements fresh evasion techniques, for example, the authors have encrypted both the main component and its corresponding Lua script using the ChaCha stream cipher. The script would also download, decrypt, and execute whatever Lua script it finds.

IoT 107

IoT DDOS Malware Architecture 107

SecureList

SEPTEMBER 26, 2022

These websites are often related to crack, keygen and activators for downloading software illegally, and while they may pretend to be legitimate software, they actually contain a malware dropper. The whole infection chain of NullMixer is as follows: The user visits a website to download cracked software, keygens or activators.

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Malware Cryptocurrency Passwords Software 133

Malwarebytes

MARCH 29, 2021

For years, Apple has marketed its iPhone as the more secure, more private option when compared to other smart phones, which do not, by default, include an end-to-end encrypted messaging app, warn users repeatedly about app location requests, or provide a privacy-forward Single Sign-On feature. VPNs encrypt your iPhone’s app traffic.

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VPN Mobile Internet Internet 139

SecureList

SEPTEMBER 2, 2021

The infection chain of recent QakBot releases (2020-2021 variants) is as follows: The user receives a phishing email with a ZIP attachment containing an Office document with embedded macros, the document itself or a link to download malicious document. The loaded payload (stager) includes another binary containing encrypted resource modules.

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Passwords Encryption Banking Malware 144

Security Affairs

NOVEMBER 21, 2019

In October one of the honeypots of the company captured the bot, its downloader , and some bot modules. “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.”

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DDOS Advertising System Administration DNS 108

Security Affairs

OCTOBER 20, 2021

“However, instead of sending it in cleartext, the client deploys a symmetric AES encryption for any communication over the WebSocket for the first exchange, as no shared secret is established yet, and the AES encryption will generate a default key for this first exchange. .” continues the analysis.

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Encryption DNS Architecture Firewall 121

Security Affairs

APRIL 12, 2019

Unfortunately, users that have no backups of their encryption keys will be not able to read their previous conversations. Forensics are ongoing; so far we’ve found no evidence of large quantities of data being downloaded.” ” continues Matrix.org. ” reads an update published by the organization.

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Hacking DNS Passwords Data breaches 108

SecureList

NOVEMBER 6, 2024

Its parameters are also encrypted — they are decrypted once dropped by the first stage. The target DLL is loaded via a malicious shellcode and encrypted with AES-128 in the same way as described earlier in the initial stage. The XMRig component is downloaded from one of the repositories at hxxps://github[.]com/cppdev-123.

Software 125

Software Cryptocurrency Malware DNS 125

Security Boulevard

FEBRUARY 1, 2023

Download Portmaster Linux The easiest way to install Portmaster is via the package manager; users can download the.deb file and install Portmaster from their graphical user interface (GUI). Download Portmaster Running Portmaster Running Portmaster is easy; it can be ran from the GUI of Windows or Linux or via the Linux command line.

DNS 75

DNS Firewall Internet Internet 75

Security Affairs

JULY 23, 2019

The Okrum backdoor supports several commands to implement several abilities, such as download/upload files, execute binaries, run shell commands, update itself , and adjust the time it sleeps after each backdoor command. . Once executed the command the backdoor returns output through DNS.

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DNS Malware Advertising Manufacturing 110

Security Affairs

OCTOBER 22, 2021

Up.sys downloads an executable and starts it using an embedded dll which it injects from kernel mode. xyz” TLD that are randomly generated and that stored in an encrypted form inside the binary. .” xyz” TLD that are randomly generated and that stored in an encrypted form inside the binary.

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Malware DNS Internet Internet 137

SecureList

FEBRUARY 7, 2022

We have been tracking Roaming Mantis since 2018, and published five blog posts about this campaign: Roaming Mantis uses DNS hijacking to infect Android smartphones. and Trojan-Dropper.AndroidOS.Wroba.o ( download ). The number of downloaded APK files and IPs/domains of landing pages. downloads. Roaming Mantis, part III.

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Phishing DNS Mobile Malware 99

SecureList

APRIL 24, 2023

Introduction We introduced Tomiris to the world in September 2021, following our investigation of a DNS-hijack against a government organization in the Commonwealth of Independent States (CIS). Backdoors, whose feature set is typically limited to reconnaissance, command execution, file download and file upload.

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Malware DNS Government Software 134

SecureList

JUNE 2, 2022

Layout of the encrypted data. Packets exchanged with the C2 server contain a header (described in the next table) followed by AES-encrypted data. Initial connection: the generated AES key and its CRC32, encrypted using RSA-2048 with a hardcoded public key. x33x44”). Description. Sample value (in hex). Unknown static value.

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Malware Encryption Social Engineering Telecommunications 143

eSecurity Planet

SEPTEMBER 17, 2021

Cobalt Strike Beacon Linux enables emulation of advanced attacks to a network over HTTP, HTTPS, or DNS. Beacon’s shell commands are handy for performing various injections , remote command executions, and unauthorized uploads and downloads. A New Variant of Cobalt Strike. The console returns command output and other information.

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DNS Malware Software Security Awareness 97

Webroot

SEPTEMBER 7, 2023

How to protect your data A sophisticated, layered security strategy will already have prevention tools like endpoint and DNS protection in place as well as security awareness training to stop threats before they reach your network. If a cyber criminal gets access to emails, they won’t be able to access that sensitive data if it’s encrypted.

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Encryption Cyber Insurance Cybercrime Phishing 97