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Cybersecurity researchers have called attention to a novel phishing campaign that leverages corrupted Microsoft Office documents and ZIP archives as a way to bypass email defenses. "The ongoing attack evades #antivirus software, prevents uploads to sandboxes, and bypasses Outlook's spam filters, allowing the malicious emails to reach your inbox," ANY.RUN said in a series of posts on X. The malicious activity entails sending emails containing ZIP archives or Office attachments that are intentionally corrupted in such a way that they cannot be scanned by security tools. These messages aim to trick users into opening the attachments with false promises of employee benefits and bonuses. In other words, the corrupted state of the files means that they are not flagged as suspicious or malicious by email filters and antivirus software. However, the attack still works because it takes advantage of the built-in recovery mechanisms of programs like Word, Outlook, and WinRAR ...

The North Korea-aligned threat actor known as Kimsuky has been linked to a series of phishing attacks that involve sending email messages that originate from Russian sender addresses to ultimately conduct credential theft. "Phishing emails were sent mainly through email services in Japan and Korea until early September," South Korean cybersecurity company Genians said . "Then, from mid-September, some phishing emails disguised as if they were sent from Russia were observed." This entails the abuse of VK's Mail.ru email service, which supports five different alias domains, including mail.ru, internet.ru, bk.ru, inbox.ru, and list.ru. Genians said it has observed the Kimsuky actors leveraging all the aforementioned sender domains for phishing campaigns that masquerade as financial institutions and internet portals like Naver. Other phishing attacks have entailed sending messages that mimic Naver's MYBOX cloud storage service and aim to trick users into ...

Vulnerability Management (VM) has long been a cornerstone of organizational cybersecurity. Nearly as old as the discipline of cybersecurity itself, it aims to help organizations identify and address potential security issues before they become serious problems. Yet, in recent years, the limitations of this approach have become increasingly evident.  At its core, Vulnerability Management processes remain essential for identifying and addressing weaknesses. But as time marches on and attack avenues evolve, this approach is beginning to show its age. In a recent report, How to Grow Vulnerability Management into Exposure Management (Gartner, How to Grow Vulnerability Management Into Exposure Management, 8 November 2024, Mitchell Schneider Et Al.), we believe Gartner® addresses this point precisely and demonstrates how organizations can – and must – shift from a vulnerability-centric strategy to a broader Exposure Management (EM) framework. We feel it's more than a worthwhile read an...

Multi-stage cyber attacks, characterized by their complex execution chains, are designed to avoid detection and trick victims into a false sense of security. Knowing how they operate is the first step to building a solid defense strategy against them. Let's examine real-world examples of some of the most common multi-stage attack scenarios that are active right now. URLs and Other Embedded Content in Documents Attackers frequently hide malicious links within seemingly legitimate documents, such as PDFs or Word files. Upon opening the document and clicking the embedded link, users are directed to a malicious website. These sites often employ deceptive tactics to get the victim to download malware onto their computer or share their passwords. Another popular type of embedded content is QR codes. Attackers conceal malicious URLs within QR codes and insert them into documents. This strategy forces users to turn to their mobile devices to scan the code, which then directs them to ph...

Cybersecurity researchers are calling attention to a new sophisticated tool called GoIssue that can be used to send phishing messages at scale targeting GitHub users. The program, first marketed by a threat actor named cyberdluffy (aka Cyber D' Luffy) on the Runion forum earlier this August, is advertised as a tool that allows criminal actors to extract email addresses from public GitHub profiles and send bulk emails directly to user inboxes. "Whether you're aiming to reach a specific audience or expand your outreach, GoIssue offers the precision and power you need," the threat actor claimed in their post. "GoIssue can send bulk emails to GitHub users, directly to their inboxes, targeting any recipient." SlashNext said the tool marks a "dangerous shift in targeted phishing" that could act as a gateway to source code theft, supply chain attacks, and corporate network breaches via compromised developer credentials. "Armed with this inform...

The Computer Emergency Response Team of Ukraine (CERT-UA) has detailed a new malicious email campaign targeting government agencies, enterprises, and military entities. "The messages exploit the appeal of integrating popular services like Amazon or Microsoft and implementing a zero-trust architecture," CERT-UA said . "These emails contain attachments in the form of Remote Desktop Protocol ('.rdp') configuration files." Once executed, the RDP files establish a connection with a remote server, enabling the threat actors to gain remote access to the compromised hosts, steal data, and plant additional malware for follow-on attacks. Infrastructure preparation for the activity is believed to have been underway since at least August 2024, with the agency stating that it's likely to spill out of Ukraine to target other countries. CERT-UA has attributed the campaign to a threat actor it tracks as UAC-0215. Amazon Web Services (AWS), in an advisory of its own...

Russian-speaking users have become the target of a new phishing campaign that leverages an open-source phishing toolkit called Gophish to deliver DarkCrystal RAT (aka DCRat) and a previously undocumented remote access trojan dubbed PowerRAT. "The campaign involves modular infection chains that are either Maldoc or HTML-based infections and require the victim's intervention to trigger the infection chain," Cisco Talos researcher Chetan Raghuprasad said in a Tuesday analysis. The targeting of Russian-speaking users is an assessment derived from the language used in the phishing emails, the lure content in the malicious documents, links masquerade as Yandex Disk ("disk-yandex[.]ru"), and HTML web pages disguised as VK, a social network predominantly used in the country. Gophish refers to an open-source phishing framework that allows organizations to test their phishing defenses by leveraging easy-to-use templates and launch email-based campaigns that can the...

Two malware families that suffered setbacks in the aftermath of a coordinated law enforcement operation called Endgame have resurfaced as part of new phishing campaigns. Bumblebee and Latrodectus , which are both malware loaders, are designed to steal personal data, along with downloading and executing additional payloads onto compromised hosts. Tracked under the names BlackWidow, IceNova, Lotus, or Unidentified 111, Latrodectus, is also considered to be a successor to IcedID owing to infrastructure overlaps between the two malware families. It has been used in campaigns associated with two initial access brokers (IABs) known as TA577 (aka Water Curupira) and TA578. In May 2024, a coalition of European countries said it dismantled over 100 servers linked to several malware strains such as IcedID (and, by extension, Latrodectus), SystemBC, PikaBot, SmokeLoader, Bumblebee, and TrickBot. "Although Latrodectus was not mentioned in the operation, it was also affected and its ...

Unknown threat actors have been observed attempting to exploit a now-patched security flaw in the open-source Roundcube webmail software as part of a phishing attack designed to steal user credentials. Russian cybersecurity company Positive Technologies said it discovered last month an email that was sent to an unspecified governmental organization located in one of the Commonwealth of Independent States (CIS) countries. However, it bears noting that the message was originally sent in June 2024. "The email appeared to be a message without text, containing only an attached document," it said in an analysis published earlier this week. "However, the email client didn't show the attachment. The body of the email contained distinctive tags with the statement eval(atob(...)), which decode and execute JavaScript code." The attack chain, per Positive Technologies, is an attempt to exploit CVE-2024-37383 (CVSS score: 6.1), a stored cross-site scripting ( XSS ) v...

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 ...

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%)...