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A developing piece of ransomware called  Big Head  is being distributed as part of a malvertising campaign that takes the form of bogus Microsoft Windows updates and Word installers. Big Head was  first documented  by Fortinet FortiGuard Labs last month, when it discovered multiple variants of the ransomware that are designed to encrypt files on victims' machines in exchange for a cryptocurrency payment. "One Big Head ransomware variant displays a fake Windows Update, potentially indicating that the ransomware was also distributed as a fake Windows Update," Fortinet researchers said at the time. "One of the variants has a Microsoft Word icon and was likely distributed as counterfeit software." A majority of the Big Head samples have been submitted so far from the U.S., Spain, France, and Turkey. In a new analysis of the .NET-based ransomware, Trend Micro detailed its inner workings, calling out its ability to deploy three encrypted binaries: 1.exe to propag...

Apple has released  Rapid Security Response  updates for iOS, iPadOS, macOS, and Safari web browser to  address  a zero-day flaw that it said has been actively exploited in the wild. The WebKit bug, cataloged as  CVE-2023-37450 , could allow threat actors to achieve arbitrary code execution when processing specially crafted web content. The iPhone maker said it addressed the issue with improved checks. Credited with discovering and reporting the flaw is an anonymous researcher. As with most cases like this, there are scant details about the nature and the scale of the attacks and the identity of the threat actor behind them. But Apple noted in a terse advisory that it's "aware of a report that this issue may have been actively exploited." The updates, iOS 16.5.1 (a), iPadOS 16.5.1 (a), macOS Ventura 13.4.1 (a), and Safari 16.5.2, are available for devices running the following operating system versions: iOS 16.5.1 and iPadOS 16.5.1 macOS Ventura 13.4.1 ...

Mozilla has announced that some add-ons may be blocked from running on certain sites as part of a new feature called  Quarantined Domains . "We have introduced a new back-end feature to only allow some extensions monitored by Mozilla to run on specific websites for various reasons, including security concerns," the company  said  in its Release Notes for Firefox 115.0 shipped last week. The company said the openness afforded by the add-on ecosystem could be exploited by malicious actors to their advantage. "This feature allows us to prevent attacks by malicious actors targeting specific domains when we have reason to believe there may be malicious add-ons we have not yet discovered," Mozilla  said  in a separate support document. Users are expected to have more control over the setting for each add-on, starting with Firefox version 116. That said, it can be disabled by loading "about:config" in the address bar and setting "extensions.quarantined...

Businesses operating in the Latin American (LATAM) region are the target of a new Windows-based banking trojan called  TOITOIN  since May 2023. "This sophisticated campaign employs a trojan that follows a multi-staged infection chain, utilizing specially crafted modules throughout each stage," Zscaler researchers Niraj Shivtarkar and Preet Kamal  said  in a report published last week. "These modules are custom designed to carry out malicious activities, such as injecting harmful code into remote processes, circumventing User Account Control via COM Elevation Moniker, and evading detection by Sandboxes through clever techniques like system reboots and parent process checks." The six-stage endeavor has all the hallmarks of a well-crafted attack sequence, beginning with a phishing email containing an embedded link that points to a ZIP archive hosted on an Amazon EC2 instance to evade domain-based detections. The email messages leverage an invoice-themed lure to t...

Brick-and-mortar retailers and e-commerce sellers may be locked in a fierce battle for market share, but one area both can agree on is the need to secure their SaaS stack. From communications tools to order management and fulfillment systems, much of today's critical retail software lives in SaaS apps in the cloud. Securing those applications is crucial to ongoing operations, chain management, and business continuity.  Breaches in retail send out seismic shockwaves. Ten years later, many still remember one national retailer that had 40 million credit card records stolen. Those attacks have continued. According to  Verizon's  Data Breach Investigations Report, last year saw 629 cybersecurity incidents in the sector. Clearly, retailers must take concrete steps to secure their SaaS stack.  And yet, securing applications is complicated. Retailers tend to have multiple tenants of apps, which leads to confusion over which instances of the application were already secur...

The threat actors behind the RomCom RAT have been suspected of phishing attacks targeting the  upcoming NATO Summit  in Vilnius as well as an identified organization supporting Ukraine abroad. The findings come from the BlackBerry Threat Research and Intelligence team, which  found  two malicious documents submitted from a Hungarian IP address on July 4, 2023. RomCom, also tracked under the names Tropical Scorpius, UNC2596, and Void Rabisu, was recently observed staging cyber attacks against politicians in Ukraine who are working closely with Western countries and a U.S.-based healthcare organization involved with aiding refugees fleeing the war-torn country. Attack chains mounted by the group are geopolitically motivated and have employed spear-phishing emails to point victims to cloned websites hosting trojanized versions of popular software. Targets include militaries, food supply chains, and IT companies. The latest lure documents identified by BlackBerry ...

Malicious actors exploited an unknown flaw in Revolut's payment systems to steal more than $20 million of the company's funds in early 2022. The development was  reported  by the Financial Times, citing multiple unnamed sources with knowledge of the incident. The breach has not been disclosed publicly. The fault stemmed from discrepancies between Revolut's U.S. and European systems, causing funds to be erroneously refunded using its own money when some transactions were declined. The problem was first detected in late 2021. But before it could be closed, the report said organized criminal groups leveraged the loophole by "encouraging individuals to try to make expensive purchases that would go on to be declined." The refunded amounts would then be withdrawn from ATMs. The exact technical details associated with the flaw are currently unclear. About $23 million was stolen in total, with some funds recovered by pursuing those who had withdrawn cash. The mass ...

Two file management apps on the Google Play Store have been discovered to be spyware, putting the privacy and security of up to 1.5 million Android users at risk. These apps engage in deceptive behaviour and secretly send sensitive user data to malicious servers in China. Pradeo, a leading mobile security company, has uncovered this alarming infiltration. The report shows that both spyware apps, namely File Recovery and Data Recovery (com.spot.music.filedate) with over 1 million installs, and File Manager (com.file.box.master.gkd) with over 500,000 installs, are developed by the same group. These seemingly harmless Android apps use similar malicious tactics and automatically launch when the device reboots without user input. Contrary to what they claim on the Google Play Store, where both apps assure users that no data is collected, Pradeo's analytics engine has found that various personal information is collected without users' knowledge. Stolen data includes contact list...

Every website owner or webmaster grapples with the issue of spam on their website forms. The volume of spam can be so overwhelming that finding useful information within it becomes quite challenging. What exacerbates this issue is that spam can populate your public pages, appearing in comments and reviews. You likely understand how this can damage your website's reputation, affect search results, overload your web server, and divert your focus from website development. Website owners and webmasters need a solution to this problem. When selecting an anti-spam solution, the following requirements should be taken into account: The solution must operate automatically, eliminating the need for manual spam checks. It should provide a quick and efficient method of accuracy control. It must be universal, protecting all website forms simultaneously. It should be easy and straightforward to install and set up. It should not require any extra steps from your visitors, ensuring they do...

Researchers have issued a warning about an emerging and advanced form of voice phishing ( vishing ) known as " Letscall ." This technique is currently targeting individuals in South Korea. The criminals behind "Letscall" employ a multi-step attack to deceive victims into downloading malicious apps from a counterfeit Google Play Store website. Once the malicious software is installed, it redirects incoming calls to a call center under the control of the criminals. Trained operators posing as bank employees then extract sensitive information from unsuspecting victims. To facilitate the routing of voice traffic, "Letscall" utilizes cutting-edge technologies such as voice over IP (VOIP) and WebRTC. It also makes use of Session Traversal Utilities for NAT (STUN) and Traversal Using Relays around NAT (TURN) protocols, including Google STUN servers, to ensure high-quality phone or video calls and bypass NAT and firewall restrictions. The "Letscall...

Progress Software has announced the discovery and patching of a critical SQL injection vulnerability in MOVEit Transfer, popular software used for secure file transfer. In addition, Progress Software has patched two other high-severity vulnerabilities. The identified SQL injection vulnerability, tagged as CVE-2023-36934 , could potentially allow unauthenticated attackers to gain unauthorized access to the MOVEit Transfer database. SQL injection vulnerabilities are a well-known and dangerous security flaw that allows attackers to manipulate databases and run any code they want. Attackers can send specifically designed payloads to certain endpoints of the affected application, which could change or expose sensitive data in the database. The reason CVE-2023-36934 is so critical is that it can be exploited without having to be logged in. This means that even attackers without valid credentials can potentially exploit the vulnerability. However, as of now, there have been no reports of...

Mastodon, a popular decentralized social network, has released a security update to fix critical vulnerabilities that could expose millions of users to potential attacks. Mastodon is known for its federated model, consisting of thousands of separate servers called "instances," and it has over 14 million users across more than 20,000 instances. The most critical vulnerability, CVE-2023-36460 , allows hackers to exploit a flaw in the media attachments feature, creating and overwriting files in any location the software could access on an instance. This software vulnerability could be used for DoS and arbitrary remote code execution attacks, posing a significant threat to users and the broader Internet ecosystem. If an attacker gains control over multiple instances, they could cause harm by instructing users to download malicious applications or even bring down the entire Mastodon infrastructure. Fortunately, there is no evidence of this vulnerability being exploited so fa...