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Cybersecurity researchers are warning about active exploitation attempts targeting a newly disclosed security flaw in Synacor's Zimbra Collaboration. Enterprise security firm Proofpoint said it began observing the activity starting September 28, 2024. The attacks seek to exploit CVE-2024-45519 , a severe security flaw in Zimbra's postjournal service that could enable unauthenticated attackers to execute arbitrary commands on affected installations. "The emails spoofing Gmail were sent to bogus addresses in the CC fields in an attempt for Zimbra servers to parse and execute them as commands," Proofpoint said in a series of posts on X. "The addresses contained Base64 strings that are executed with the sh utility." The critical issue was addressed by Zimbra in versions 8.8.15 Patch 46, 9.0.0 Patch 41, 10.0.9, and 10.1.1 released on September 4, 2024. A security researcher named lebr0nli (Alan Li) has been credited with discovering and reporting the short

Phishing attacks are becoming more advanced and harder to detect, but there are still telltale signs that can help you spot them before it's too late. See these key indicators that security experts use to identify phishing links: 1. Check Suspicious URLs  Phishing URLs are often long, confusing, or filled with random characters. Attackers use these to disguise the link's true destination and mislead users.  The first step in protecting yourself is to inspect the URL carefully. Always ensure it begins with "HTTPS," as the "s" indicates a secure connection using an SSL certificate.  However, keep in mind that SSL certificates alone are not enough. Cyber attackers have increasingly used legitimate-looking HTTPS links to distribute malicious content. This is why you should be suspicious of links that are overly complex or look like a jumble of characters.  Tools like ANY.RUN's Safebrowsing allow users to check suspicious links in a secure and isolated environment w

For years, securing a company's systems was synonymous with securing its "perimeter." There was what was safe "inside" and the unsafe outside world. We built sturdy firewalls and deployed sophisticated detection systems, confident that keeping the barbarians outside the walls kept our data and systems safe. The problem is that we no longer operate within the confines of physical on-prem installations and controlled networks. Data and applications now reside in distributed cloud environments and data centers, accessed by users and devices connecting from anywhere on the planet. The walls have crumbled, and the perimeter has dissolved, opening the door to a new battlefield: identity . Identity is at the center of what the industry has praised as the new gold standard of enterprise security: "zero trust." In this paradigm, explicit trust becomes mandatory for any interactions between systems, and no implicit trust shall subsist. Every access request, regardless of its origin,

Transportation and logistics companies in North America are the target of a new phishing campaign that delivers a variety of information stealers and remote access trojans (RATs). The activity cluster, per Proofpoint, makes use of compromised legitimate email accounts belonging to transportation and shipping companies so as to inject malicious content into existing email conversations. As many as 15 breached email accounts have been identified as used as part of the campaign. It's currently not clear how these accounts are infiltrated in the first place or who is behind the attacks. "Activity which occurred from May to July 2024 predominately delivered Lumma Stealer, StealC, or NetSupport," the enterprise security firm said in an analysis published Tuesday. "In August 2024, the threat actor changed tactics by employing new infrastructure and a new delivery technique, as well as adding payloads to deliver DanaBot and Arechclient2." The attack chains invol

Cybersecurity researchers have warned of ongoing phishing campaigns that abuse refresh entries in HTTP headers to deliver spoofed email login pages that are designed to harvest users' credentials. "Unlike other phishing webpage distribution behavior through HTML content, these attacks use the response header sent by a server, which occurs before the processing of the HTML content," Palo Alto Networks Unit 42 researchers Yu Zhang, Zeyu You, and Wei Wang said . "Malicious links direct the browser to automatically refresh or reload a web page immediately, without requiring user interaction." Targets of the large-scale activity, observed between May and July 2024, include large corporations in South Korea, as well as government agencies and schools in the U.S. As many as 2,000 malicious URLs have been associated with the campaigns. Over 36% of the attacks have singled out the business-and-economy sector, followed by financial services (12.9%), government (6.9%)

Cybersecurity researchers have discovered a novel phishing campaign that leverages Google Drawings and shortened links generated via WhatsApp to evade detection and trick users into clicking on bogus links designed to steal sensitive information. "The attackers chose a group of the best-known websites in computing to craft the threat, including Google and WhatsApp to host the attack elements, and an Amazon look-alike to harvest the victim's information," Menlo Security researcher Ashwin Vamshi said . "This attack is a great example of a Living Off Trusted Sites ( LoTS ) threat." The starting point of the attack is a phishing email that directs the recipients to a graphic that appears to be an Amazon account verification link. This graphic, for its part, is hosted on Google Drawings, in an apparent effort to evade detection. Abusing legitimate services has obvious benefits for attackers in that they're not only a low-cost solution, but more importantly,

Cybersecurity researchers have disclosed details of security flaws in the Roundcube webmail software that could be exploited to execute malicious JavaScript in a victim's web browser and steal sensitive information from their account under specific circumstances. "When a victim views a malicious email in Roundcube sent by an attacker, the attacker can execute arbitrary JavaScript in the victim's browser," cybersecurity company Sonar said in an analysis published this week. "Attackers can abuse the vulnerability to steal emails, contacts, and the victim's email password as well as send emails from the victim's account." Following responsible disclosure on June 18, 2024, the three vulnerabilities have been addressed in Roundcube versions 1.6.8 and 1.5.8 released on August 4, 2024. The list of vulnerabilities is as follows - CVE-2024-42008 - A cross-site scripting flaw via a malicious email attachment served with a dangerous Content-Type head

INTERPOL said it devised a "global stop-payment mechanism" that helped facilitate the largest-ever recovery of funds defrauded in a business email compromise ( BEC ) scam.  The development comes after an unnamed commodity firm based in Singapore fell victim to a BEC scam in mid-July 2024. It refers to a type of cybercrime where a malicious actor poses as a trusted figure and uses email to trick targets into sending money or divulging confidential company information. Such attacks can take place in myriad ways, including gaining unauthorized access to a finance employee or a law firm's email account to send fake invoices or impersonating a third-party vendor to email a phony bill. "On 15 July, the firm had received an email from a supplier requesting that a pending payment be sent to a new bank account based in Timor-Leste," INTERPOL said in a press statement. "The email, however, came from a fraudulent account spelled slightly different to the supplier

Cybersecurity companies are warning about an uptick in the abuse of Clouflare's TryCloudflare free service for malware delivery. The activity, documented by both eSentire and Proofpoint , entails the use of TryCloudflare to create a rate-limited tunnel that acts as a conduit to relay traffic from an attacker-controlled server to a local machine through Cloudflare's infrastructure. Attack chains taking advantage of this technique have been observed delivering a cocktail of malware families such as AsyncRAT, GuLoader, PureLogs Stealer, Remcos RAT, Venom RAT, and XWorm. The initial access vector is a phishing email containing a ZIP archive, which includes a URL shortcut file that leads the message recipient to a Windows shortcut file hosted on a TryCloudflare-proxied WebDAV server. The shortcut file, in turn, executes next-stage batch scripts responsible for retrieving and executing additional Python payloads, while simultaneously displaying a decoy PDF document hosted on

We'll TL;DR the FUDdy introduction: we all know that phishing attacks are on the rise in scale and complexity, that AI is enabling more sophisticated attacks that evade traditional defenses, and the never-ending cybersecurity talent gap means we're all struggling to keep security teams fully staffed.  Given that reality, security teams need to be able to monitor and respond to threats effectively and efficiently. You obviously can't let real threats slip past unnoticed, but you also can't afford to waste time chasing false positives.  In this post, we're going to look at some of the ways Material Security 's unique approach to email security and data protection can dramatically–and quantifiably–save your security teams hours each week while improving the effectiveness of your security program.  What's Your Alert Budget? Before we dive into the "how," let's take a moment to look at why efficiency is critical in security operations. To do that, let's think about how many alerts can

Cybersecurity researchers are warning about a new phishing campaign that targets Microsoft OneDrive users with the aim of executing a malicious PowerShell script. "This campaign heavily relies on social engineering tactics to deceive users into executing a PowerShell script, thereby compromising their systems," Trellix security researcher Rafael Pena said in a Monday analysis. The cybersecurity company is tracking the "crafty" phishing and downloader campaign under the name OneDrive Pastejacking. The attack unfolds via an email containing an HTML file that, when opened, displays an image simulating an OneDrive page and includes the error message that says: "Failed to connect to the 'OneDrive' cloud service. To fix the error, you need to update the DNS cache manually." The message also comes with two options, namely "How to fix" and "Details," with the latter directing the email recipient to a legitimate Microsoft Learn pag

An unknown threat actor has been linked to a massive scam campaign that exploited an email routing misconfiguration in email security vendor Proofpoint's defenses to send millions of messages spoofing various popular companies like Best Buy, IBM, Nike, and Walt Disney, among others. "These emails echoed from official Proofpoint email relays with authenticated SPF and DKIM signatures , thus bypassing major security protections — all to deceive recipients and steal funds and credit card details," Guardio Labs researcher Nati Tal said in a detailed report shared with The Hacker News. The cybersecurity company has given the campaign the name EchoSpoofing . The activity is believed to have commenced in January 2024, with the threat actor exploiting the loophole to send as many as three million emails per day on average, a number that hit a peak of 14 million in early June as Proofpoint began to enact countermeasures. "The most unique and powerful part of this domain

A critical security issue has been disclosed in the Exim mail transfer agent that could enable threat actors to deliver malicious attachments to target users' inboxes. The vulnerability , tracked as CVE-2024-39929, has a CVSS score of 9.1 out of 10.0. It has been addressed in version 4.98. "Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users," according to a description shared on the U.S. National Vulnerability Database (NVD). Exim is a free, mail transfer agent that's used in hosts that are running Unix or Unix-like operating systems. It was first released in 1995 for use at the University of Cambridge.  Attack surface management firm Censys said 4,830,719 of the 6,540,044 public-facing SMTP mail servers are running Exim. As of July 12, 2024, 1,563,085 internet-accessible

Spanish language victims are the target of an email phishing campaign that delivers a new remote access trojan (RAT) called Poco RAT since at least February 2024. The attacks primarily single out mining, manufacturing, hospitality, and utilities sectors, according to cybersecurity company Cofense. "The majority of the custom code in the malware appears to be focused on anti-analysis, communicating with its command-and-control center (C2), and downloading and running files with a limited focus on monitoring or harvesting credentials," it said . Infection chains begin with phishing messages bearing finance-themed lures that trick recipients into clicking on an embedded URL pointing to a 7-Zip archive file hosted on Google Drive. Other methods observed include the use of HTML or PDF files directly attached to the emails or downloaded via another embedded Google Drive link. The abuse of legitimate services by threat actors is not a new phenomenon as it allows them to bypass