Security Affairs

NOVEMBER 5, 2021

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. The ransomware module encrypts the files in the victim’s server and appends a file extension.babyk to the encrypted files.” Pierluigi Paganini.

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Ransomware Backups Encryption DNS 145

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 103

Technology DNS Encryption Authentication 103

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.

DNS 122

DNS Phishing Encryption Antivirus 122

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.

DNS 66

DNS Engineering Malware Encryption 66

Security Affairs

JULY 15, 2024

An attacker can exploit the issue to obtain encrypted credentials stored in the configuration database, potentially leading to gaining access to the backup infrastructure hosts. Once data exfiltration was completed, the attackers deployed ransomware to encrypt the infected systems. The vulnerability CVE-2023-275327 (CVSS score of 7.5)

Backups 140

Backups Ransomware Antivirus DNS 140

Malwarebytes

JANUARY 22, 2024

The group uses social engineering techniques to persuade their targets to open documents or download malware. Once a relationship has been established, the target will receive a phishing link or a document containing such a link. These targets are approached in spear phishing attacks.

Social Engineering 111

Social Engineering Government Media DNS 111

Security Affairs

AUGUST 31, 2022

Upon opening the document, a malicious template file is downloaded and saved on the system. Once executed, the malware makes unique DNS connections, experts determined that the binary was leveraging a DNS data exfiltration technique by sending unique DNS queries to a target C2 DNS server.

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Malware DNS Antivirus Encryption 98

Security Affairs

FEBRUARY 5, 2021

Below the attack chain documented by the reseachers from Palo Alto Networks: The attacker targeted an unsecured Kubelet on the internet and searched for containers running inside the Kubernetes nodes. It also hides malicious processes using library injection and encrypts the malicious payload.

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Malware DNS Cryptocurrency Internet 119

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.

DNS 145

DNS Malware Mobile Firewall 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.” Experts also observed attackers using a DNS downloader that was designed for long-term, covert access to the target machine.

DNS 122

DNS Advertising Spyware Software 122

CyberSecurity Insiders

JANUARY 6, 2022

Secure Sockets Layer (SSL) is a standard security protocol that encrypts the connection between a web browser and a server. This only takes a few clicks, because an SSL certificate is a text file with encrypted data. HTTPS and DNS), data link (e.g., Use data encryption. Given that the average cost of a data breach is $3.86

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Encryption Identity Theft Authentication Data breaches 134

eSecurity Planet

SEPTEMBER 3, 2022

For example, the 2016 DDoS attack on the Dyn managed domain name service (DNS) caused the DNS service to fail to respond to legitimate DNS inquiries and effectively shut down major sites such as PayPal, Spotify, Twitter, Yelp, and many others. Also read: How to Secure DNS. Types of DDoS Attacks. Harden infrastructure.

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DDOS DNS Firewall Internet 145

Security Affairs

APRIL 23, 2019

Security expert Marco Ramilli published the findings of a quick analysis of the webmask project standing behind the DNS attacks implemented by APT34 (aka OilRig and HelixKitten ). According to Duo, “ OilRig delivered Trojans that use DNS tunneling for command and control in attacks since at least May 2016. Leaked Source code.

DNS 107

DNS Computers and Electronics Penetration Testing Government 107

Hot for Security

MAY 26, 2021

Like most ransomware variants, Conti typically steals victims’ files and encrypts the servers and workstations in an effort to force a ransom payment from the victim,” the agency notes. The document contains valuable technical information regarding Conti’s modus operandi.

Healthcare 111

Healthcare Ransomware System Administration DNS 111

Troy Hunt

NOVEMBER 25, 2020

Let's start by looking at this from a philosophical standpoint: But here’s the bigger philosophical question: the device still worked fine with the native app, should @TPLINKUK be held accountable for supporting non-documented use cases? Probably “no”, but in a perfect world they’d document local connections by other apps and not break that.

IoT 362

IoT Firmware Risk Manufacturing 362

SecureList

SEPTEMBER 2, 2021

In some cases, the emails were delivered with Microsoft Office documents (Word, Excel) or password-protected archives with the documents attached. The documents contained macros and victims were prompted to open the attachments with claims that they contained important information (e.g., HTTPS POST request with encrypted JSON.

Passwords 145

Passwords Encryption Banking Malware 145

Security Affairs

JUNE 9, 2022

SentinelOne documented a series of attacks aimed at government, education, and telecom entities in Southeast Asia and Australia carried out by a previously undocumented Chinese-speaking APT tracked as Aoqin Dragon. Luring users into double-clicking a fake Anti-Virus to execute malware in the victim’s host.

Malware 98

Malware DNS Encryption Education 98

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

SEPTEMBER 29, 2021

While supply-chain attacks were already a documented attack vector leveraged by a number of APT actors, this specific campaign stood out due to the extreme carefulness of the attackers and the high-profile nature of their victims. DNS hijacking. Background. In December 2020, news of the SolarWinds incident took the world by storm.

DNS 141

DNS Malware Engineering Encryption 141

SecureWorld News

MAY 26, 2021

Here is the specific information the FBI is asking for: "The FBI is seeking any information that can be shared, to include boundary logs showing communication to and from foreign IP addresses, Bitcoin wallet information, the decryptor file, and/or a benign sample of an encrypted file. The FBI does not encourage paying ransoms.

Ransomware 91

Ransomware DNS Encryption Healthcare 91

Security Affairs

DECEMBER 7, 2019

State-sponsored hackers launched spear-phishing attackes using weaponized documents. The bait documents reveal malicious activity from at least September 2019, to November 25, 2019. Gamaredon is using weaponized documents, sometimes retrieved from legitimate sources as the initial infection vector.”

Government 89

Government Advertising Media DNS 89

SecureList

JANUARY 13, 2022

A document sent from one colleague to another on a topic, which is currently being discussed, is unlikely to trigger any suspicion. Ultimately, it elevates the level of trust sufficiently for the document to be opened. server-side document viewer like GoogleDocs, Collabora Online, ONLYOFFICE, Microsoft Office Online, etc.).

Cryptocurrency 145

Cryptocurrency Malware Accountability Banking 145

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 138

Malware Ransomware Encryption Energy and Utilities 138

Security Affairs

OCTOBER 20, 2021

Researchers from TrendMicro have documented a recent evolution of the PurpleFox botnet, the experts discovered a new.NET backdoor, dubbed FoxSocket, that is highly associated with the PurpleFox operation. Researchers warn of a new evolution of the PurpleFox botnet, operators included exploits and leverage WebSockets for C2 communication.

Encryption 112

Encryption DNS Architecture Firewall 112

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 malware executable file is placed in /tmp directory with a random name. Record the microphone input.

Malware 144

Malware DNS Encryption Ransomware 144

Malwarebytes

OCTOBER 16, 2022

As per Bleeping Computer , this leakage can include DNS lookups, HTTPs traffic, IP addresses and (perhaps) NTP traffic (Network Time Protocol, a protocol for synchronising net-connected clocks). Worse, it leaks DNS requests. All of the traffic that appeared in the video is either encrypted or double encrypted.

VPN 88

VPN DNS Encryption Engineering 88

Security Affairs

NOVEMBER 14, 2018

The email message contains a pdf document named ”Marine_Engine_Spare__Parts_Order.pdf”, originally prepared from an Office document using “ Microsoft Word 2013 ” and then converted into PDF format using the “ Online2PDF.com ” online service. Malicious PDF document. DNS requests intercepted.

Computers and Electronics 109

Computers and Electronics Penetration Testing Malware Phishing 109

SecureList

MAY 23, 2023

Infection vectors We have limited visibility on their infection vectors, but during our investigations, we observed the usage of fake Skype installers and malicious Word documents. The document was configured to load an external object from a legitimate and compromised website: hxxps://www.pak-developers[.]net/internal_data/templates/template.html!

Malware 144

Malware Encryption Government Technology 144

SecureWorld News

SEPTEMBER 7, 2023

Quantum computing poses a potential threat to current cybersecurity practices, which are based on encryption algorithms that can be broken by quantum computers. Ultimately, regardless of how standards and technology continue to evolve and adapt, the shortest way to break encryption is to obtain the key.

Encryption 112

Encryption Technology Risk Architecture 112

Duo's Security Blog

JULY 8, 2021

Though in recent weeks ransomware has firmly been in the forefront of people’s minds, the first documented instance of what we now know as ransomware dates back to Dr. Joseph Popp in 1989. Next, it would encrypt files on the victim’s system and deny access until they sent a $189 payment to a post office box in Panama.

Ransomware 105

Ransomware Encryption DNS Healthcare 105

Cisco Security

AUGUST 29, 2022

25+ Years of Black Hat (and some DNS stats), by Alejo Calaoagan. Cisco is a Premium Partner of the Black Hat NOC , and is the Official Wired & Wireless Network Equipment, Mobile Device Management, DNS (Domain Name Service) and Malware Analysis Provider of Black Hat. Umbrella DNS into NetWitness SIEM and Palo Alto Firewall .

DNS 103

DNS Wireless Malware Firewall 103

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). Tomiris’s endgame consistently appears to be the regular theft of internal documents. Some samples contain traces of Russian language.

Malware 135

Malware DNS Government Software 135

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 135

IoT DDOS Passwords Malware 135

SecureList

MAY 31, 2021

Once the victim opens an infected document and agrees to enable macros, the malware is dropped onto the system and proceeds to a multi-stage deployment procedure. Ransomware encrypting virtual hard disks. Ransomware gangs are exploiting vulnerabilities in VMware ESXi to target virtual hard disks and encrypt the data stored on them.

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Malware Adware Encryption Architecture 139

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 137

Malware Encryption Social Engineering Telecommunications 137

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.

Cybersecurity 122

Cybersecurity DDOS Penetration Testing Passwords 122

Security Boulevard

JANUARY 17, 2024

RBI solutions typically allow the configuration of file upload and download profiles, restricting the types of files that can be submitted or retrieved from websites based on multiple factors such as file extension, size, entropy/encryption of data, signatures, site reputation, and more. This can be due to encryption or even size.

DNS 64

DNS Penetration Testing Passwords Encryption 64