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”

DNS 74

DNS Telecommunications Malware Encryption 74

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.

Malware 90

Malware DNS Antivirus Encryption 90

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.

Ransomware 132

Ransomware Backups Encryption DNS 132

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 102

Software DNS Computers and Electronics Malware 102

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 73

Technology DNS Encryption Authentication 73

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.

Social Engineering 91

Social Engineering Government Media DNS 91

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 130

DNS Firmware VPN Risk 130

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

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. Domain Name Server (DNS). Firepower Encrypted Visibility Engine (EVE).

Wireless 67

Wireless DNS Education Encryption 67

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.

DNS 142

DNS Antivirus Malware Encryption 142

SecureWorld News

MARCH 29, 2024

To set such a stratagem in motion, cybercriminals poison legitimate websites with ads that lead to shady URLs or download malicious code camouflaged as something harmless. If a user gets on the hook, they are redirected to a landing page or prompted to download an ostensibly innocuous file.

Cybercrime 78

Cybercrime Advertising Engineering Antivirus 78

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

Malware 107

Malware DNS Encryption Cryptocurrency 107

Security Boulevard

JANUARY 17, 2024

Figure 1 — Cloudflare RBI Diagram The primary focus of RBI is to prevent user interactions with web-based malware such as cross-site scripting (XSS), drive-by downloads, and various forms of malicious JavaScript. Other RBI solutions are set to a fail-closed state that blocks the download of a file if it cannot scan it.

DNS 62

DNS Penetration Testing Passwords Encryption 62

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 105

DNS Phishing Authentication Marketing 105

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.

Encryption 89

Encryption Cyber Insurance Cybercrime Phishing 89

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 97

DNS DDOS Firewall Architecture 97

NetSpi Technical

OCTOBER 19, 2023

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. import socket data = socket.gethostbyname_ex(‘<collaborator URL>’) print(repr(data)) We have DNS outbound.

DNS 97

DNS Internet Internet Phishing 97

SecureList

DECEMBER 1, 2023

For most implants, the threat actor uses similar implementations of DLL hijacking (often associated with ShadowPad malware) and memory injection techniques, along with the use of RC4 encryption to hide the payload and evade detection. libssl.dll or libcurl.dll was statically linked to implants to implement encrypted C2 communications.

Malware 91

Malware Ransomware Encryption Energy and Utilities 91

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.

DNS 85

DNS Advertising Spyware Software 85

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.

Hacking 347

Hacking Cybercrime DNS Antivirus 347

Security Boulevard

JULY 22, 2023

TABLE OF CONTENTS Overview Revisiting Waterfox in 2023 Waterfox is independent A refreshed download/install experience Waterfox appears to still uphold its no telemetry claim Update conclusion What is Waterfox? A refreshed download/install experience Waterfox still downloads and installs quickly. Let's do our best to find out.

Data collection 52

Data collection Engineering Encryption DNS 52

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.

DNS 89

DNS Malware Software Security Awareness 89

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.

Encryption 96

Encryption DNS Architecture Firewall 96

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 83

IoT DDOS Architecture Malware 83

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.”

DDOS 83

DDOS System Administration Advertising DNS 83

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 97

Data breaches Malware Mobile Spyware 97

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.

Hacking 85

Hacking DNS Passwords Data breaches 85

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.

IoT 86

IoT DDOS Passwords Malware 86

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. The group has been active since at least 2013, the Aoqin Dragon was observed seeking initial access primarily through document exploits and the use of fake removable devices.

Malware 92

Malware DNS Encryption Education 92

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.

Malware 114

Malware DNS Internet Internet 114

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.

Malware 113

Malware Encryption Social Engineering Telecommunications 113

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.

DNS 91

DNS Malware Advertising Manufacturing 91

Fox IT

JUNE 2, 2020

It should be noted that in very early versions of the loader binaries (2342C736572AB7448EF8DA2540CDBF0BAE72625E41DAB8FFF58866413854CA5C), the developers were using the Windows BITS functionality in order to download the backdoor. Before proceeding to the technical analysis part, it is worth mentioning that the strings are not encrypted.

Malware 48

Malware DNS Architecture Backups 48

SecureList

AUGUST 30, 2023

The attackers were able to embed malicious code into the libffmpeg media processing library to download a payload from their servers. If the target opened the document and enabled the macros, a malicious script would extract the embedded downloader and load it with specific parameters.

Malware 73

Malware Spyware Cryptocurrency Government 73

Troy Hunt

SEPTEMBER 17, 2020

I want a "secure by default" internet with all the things encrypted all the time such that people can move freely between networks without ever needing to care about who manages them or what they're doing with them. Now let's try the mobile app: What's the encryption story there?

VPN 358

VPN Phishing DNS Encryption 358

eSecurity Planet

APRIL 24, 2023

They can change SPanel’s branding with their own, get usage reports, and download or view the Apache and PHP logs. Also, webmasters can manage: API access PHP MySQL databases DNS records Backups FTP users Users can also create packages with predefined resource limits, view resource usage, automate accounts management, and more.

Backups 69

Backups Cybercrime Authentication Accountability 69

Security Boulevard

OCTOBER 21, 2022

The WarHawk Backdoor consists of four modules: Download &amp; Execute Module. WarHawk is commissioned to deliver Cobalt Strike as the final payload which has been downloaded and executed using the Download &amp; Execute Module. SideWinder APT campaign targets Pakistan with a new backdoor named “WarHawk”. pdf - Decoy PDF.

DNS 52

DNS Phishing Malware Government 52