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Cybersecurity researchers have shed light on a new ransomware strain called CACTUS that has been found to leverage known flaws in VPN appliances to obtain initial access to targeted networks. "Once inside the network, CACTUS actors attempt to enumerate local and network user accounts in addition to reachable endpoints before creating new user accounts and leveraging custom scripts to automate the deployment and detonation of the ransomware encryptor via scheduled tasks," Kroll said in a report shared with The Hacker News. The ransomware has been observed targeting large commercial entities since March 2023, with attacks employing double extortion tactics to steal sensitive data prior to encryption. No data leak site has been identified to date. Following a successful exploitation of vulnerable VPN devices, an SSH backdoor is set up to maintain persistent access and a series of PowerShell commands are executed to conduct network scanning and identify a list of machines fo...

Are you concerned about ransomware attacks? You're not alone. In recent years, these attacks have become increasingly common and can cause significant damage to organizations of all sizes. But there's good news - with the right security measures in place, such as real-time MFA and service account protection, you can effectively protect yourself against these types of attacks. That's why we're excited to invite you to our upcoming webinar with Yiftach Keshet, cybersecurity expert and Chief Marketing Officer at Silverfort. During this webinar, Yiftach will share his insights on how real-time MFA and service account protection can defeat ransomware attacks, and why identity-focused protection is the only way to stop lateral movement and ransomware spread. Some of the key topics that will be covered in this webinar include: The increasing risk of lateral movement and how it's become one of the most critical risks facing organizations today. The blind spots in MFA...

The threat actors behind the ransomware attack on Taiwanese PC maker MSI last month have leaked the company's private code signing keys on their dark website. "Confirmed, Intel OEM private key leaked, causing an impact on the entire ecosystem," Alex Matrosov, founder and CEO of firmware security firm Binarly,  said  in a tweet over the weekend. "It appears that Intel Boot Guard may not be effective on certain devices based on the 11th Tiger Lake, 12th Adler Lake, and 13th Raptor Lake." Present in the leaked data are firmware image signing keys associated with 57 PCs and private signing keys for Intel Boot Guard used on 116 MSI products. The Boot Guard keys from MSI are believed to impact several device vendors, including Intel, Lenovo and Supermicro. Intel Boot Guard is a  hardware-based security technology  that's designed to protect computers against executing tampered UEFI firmware. The development comes a month after MSI  fell victim  to a double...

Digital storage giant Western Digital confirmed that an "unauthorized third party" gained access to its systems and stole personal information belonging to the company's online store customers. "This information included customer names, billing and shipping addresses, email addresses and telephone numbers," the San Jose-based company  said  in a disclosure last week. "In addition, the database contained, in encrypted format, hashed and salted passwords and partial credit card numbers. We will communicate directly with impacted customers." The development comes a little over a month after Western Digital  divulged  a "network security incident" on March 26, 2023, prompting the company to take its cloud services offline. A subsequent report from TechCrunch last month  revealed  that the threat actors behind the attack were allegedly in possession of "around 10 terabytes of data" and were negotiating with Western Digital for a ra...

The suspected Pakistan-aligned threat actor known as  SideCopy  has been observed leveraging themes related to the Indian military research organization as part of an ongoing phishing campaign. This involves using a ZIP archive lure pertaining to India's Defence Research and Development Organization ( DRDO ) to deliver a malicious payload capable of harvesting sensitive information, Fortinet FortiGuard Labs  said  in a new report. The cyber espionage group, with  activity  dating back to at least 2019, targets entities that align with Pakistan government interests. It's believed to share overlaps with another Pakistani hacking crew called  Transparent Tribe . SideCopy's use of DRDO-related decoys for malware distribution was previously flagged by  Cyble  and Chinese cybersecurity firm  QiAnXin  in March 2023, and again by  Team Cymru  last month. Interestingly, the same attack chains have been observed to load and ex...

Threat hunting is an essential component of your cybersecurity strategy. Whether you're getting started or in an advanced state, this article will help you ramp up your threat intelligence program. What is Threat Hunting? The cybersecurity industry is shifting from a reactive to a proactive approach. Instead of waiting for cybersecurity alerts and then addressing them, security organizations are now deploying red teams to actively seek out breaches, threats and risks, so they can be isolated. This is also known as "threat hunting."  Why is Threat Hunting Required? Threat hunting complements existing prevention and detection security controls. These controls are essential for mitigating threats. However, they are optimized for low false positive alerting. Hunt solutions, on the other hand, are optimized for low false negatives. This means that the anomalies and outliers that are considered false positives for detection solutions, are hunting solutions' leads, to b...

An ongoing phishing campaign with invoice-themed lures is being used to distribute the SmokeLoader malware in the form of a polyglot file, according to the Computer Emergency Response Team of Ukraine (CERT-UA). The emails, per the  agency , are sent using compromised accounts and come with a ZIP archive that, in reality, is a  polyglot file  containing a decoy document and a JavaScript file. The JavaScript code is then used to launch an executable that paves for the execution of the  SmokeLoader malware . SmokeLoader, first detected in 2011, is a  loader  whose main objective is to download or load a stealthier or more effective malware onto infected systems. CERT-UA attributed the activity to a threat actor it calls UAC-0006 and characterized it as a financially motivated operation carried out with the goal of stealing credentials and making unauthorized fund transfers. In a related advisory, Ukraine's cybersecurity authority also revealed details of...

An advanced persistent threat (APT) actor known as  Dragon Breath  has been observed adding new layers of complexity to its attacks by adopting a novel  DLL side-loading  mechanism. "The attack is based on a classic side-loading attack, consisting of a clean application, a malicious loader, and an encrypted payload, with various modifications made to these components over time," Sophos researcher Gabor Szappanos  said . "The latest campaigns add a twist in which a first-stage clean application 'side'-loads a second clean application and auto-executes it. The second clean application side-loads the malicious loader DLL. After that, the malicious loader DLL executes the final payload." Operation Dragon Breath, also tracked under the names APT-Q-27 and Golden Eye, was  first   documented  by QiAnXin in 2020, detailing a watering hole campaign designed to trick users into downloading a trojanized Windows installer for Telegram. A  subsequen...

Users of Advanced Custom Fields plugin for WordPress are being urged to update version 6.1.6 following the discovery of a security flaw. The issue, assigned the identifier CVE-2023-30777, relates to a case of reflected cross-site scripting (XSS) that could be abused to inject arbitrary executable scripts into otherwise benign websites. The plugin, which is available both as a free and pro version, has over  two million active installations . The issue was discovered and reported to the maintainers on May 2, 2023. "This vulnerability allows any unauthenticated user from stealing sensitive information to, in this case, privilege escalation on the WordPress site by tricking a privileged user to visit the crafted URL path," Patchstack researcher Rafie Muhammad  said . Reflected XSS  attacks usually occur when victims are tricked into clicking on a bogus link sent via email or another route, causing the malicious code to be sent to the vulnerable website, which reflects ...