A week in security (March 24 – March 30)

Last week on Malwarebytes Labs: Vulnerability in most browsers abused in targeted attacks "This fraud destroyed my life." Man ends up with criminal record after ID was stolen Moving from WhatsApp to Signal: A good idea? Security expert Troy Hunt hit by phishing attack Booking.com phish uses fake...

Top 3 MS Office Exploits Hackers Use in 2025 – Stay Alert!

Hackers have long used Word and Excel documents as delivery vehicles for malware, and in 2025, these tricks are far from outdated. From phishing schemes to zero-click exploits, malicious Office files are still one of the easiest ways into a victim's system. Here are the top three Microsoft...

DeepSeek users targeted with fake sponsored Google ads that deliver malware

The threat intel research used in this post was provided by Malwarebytes Senior Director of Research, Jérôme Segura. DeepSeek’s rising popularity has not only raised concerns and questions about privacy implications, but cybercriminals are also using it as a lure to trap unsuspecting Google...

Defending against USB drive attacks with Wazuh

USB drive attacks constitute a significant cybersecurity risk, taking advantage of the everyday use of USB devices to deliver malware and circumvent traditional network security measures. These attacks lead to data breaches, financial losses, and operational disruptions, with lasting impacts on a...

Delivering Malware Through Abandoned Amazon S3 Buckets

Here's a supply-chain attack just waiting to happen. A group of researchers searched for, and then registered, abandoned Amazon S3 buckets for about $400. These buckets contained software libraries that are still used. Presumably the projects don't realize that they have been abandoned, and still...

Beware: Fake CAPTCHA Campaign Spreads Lumma Stealer in Multi-Industry Attacks

Cybersecurity researchers are calling attention to a new malware campaign that leverages fake CAPTCHA verification checks to deliver the infamous Lumma information stealer. "The campaign is global, with Netskope Threat Labs tracking victims targeted in Argentina, Colombia, the United States, the...

Hackers Hide Malware in Images to Deploy VIP Keylogger and 0bj3ctivity Stealer

Threat actors have been observed concealing malicious code in images to deliver malware such as VIP Keylogger and 0bj3ctivity Stealer as part of separate campaigns. "In both campaigns, attackers hid malicious code in images they uploaded to archive.org, a file-hosting website, and used the same...

Lazarus Group Targets Web3 Developers with Fake LinkedIn Profiles in Operation 99

The North Korea-linked Lazarus Group has been attributed to a new cyber attack campaign dubbed Operation 99 that targeted software developers looking for freelance Web3 and cryptocurrency work to deliver malware. "The campaign begins with fake recruiters, posing on platforms like LinkedIn, luring...

‘Fix It’ social-engineering scheme impersonates several brands

More and more, threat actors are leveraging the browser to deliver malware in ways that can evade detection from antivirus programs. Social engineering is a core part of these schemes and the tricks we see are sometimes very clever. Case in point, there has been an increase in attacks that involv...

PT-2024-36603 · Phpmyfaq · Phpmyfaq

Name of the Vulnerable Software and Affected Versions: phpMyFAQ versions prior to 3.2.10 Description: A vulnerability exists in the FAQ Record component where a privileged attacker can trigger a file download on a victim's machine upon page visit by embedding it in an iframe element without user...

Black Basta Ransomware Campaign Drops Zbot, DarkGate, and Custom Malware

Executive Summary Beginning in early October, Rapid7 has observed a resurgence of activity related to the ongoing social engineering campaign being conducted by Black Basta ransomware operators. Rapid7 initially reported the discovery of the novel social engineering campaign back in May, 2024,...

GitHub, Telegram Bots, and ASCII QR Codes Abused in New Wave of Phishing Attacks

A new tax-themed malware campaign targeting insurance and finance sectors has been observed leveraging GitHub links in phishing email messages as a way to bypass security measures and deliver Remcos RAT, indicating that the method is gaining traction among threat actors. "In this campaign,...

Cloudflare Warns of India-Linked Hackers Targeting South and East Asian Entities

An advanced threat actor with an India nexus has been observed using multiple cloud service providers to facilitate credential harvesting, malware delivery, and command-and-control C2. Web infrastructure and security company Cloudflare is tracking the activity under the name SloppyLemming, which ...

Hackers Use Fake GlobalProtect VPN Software in New WikiLoader Malware Attack

A new malware campaign is spoofing Palo Alto Networks' GlobalProtect VPN software to deliver a variant of the WikiLoader aka WailingCrab loader by means of a search engine optimization SEO campaign. The malvertising activity, observed in June 2024, is a departure from previously observed tactics...

Cybercriminals Abusing Cloudflare Tunnels to Evade Detection and Spread Malware

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 ...

The massive computer outage over the weekend was not a cyber attack, and I’m not sure why we have to keep saying that

Youre not going to believe this, but there was a lot of misinformation on social media over the weekend after the massive CrowdStrike/Microsoft outage. As airlines cancelled flights, hospitals had to reschedule patients and some companies just flat-out couldnt work on Friday, people were quick to...

The vulnerability of the Siemens RUGGEDCOM CROSSBOW secure access control system allows a intruder to execute arbitrary code.

The vulnerability of the Siemens RUGGEDCOM CROSSBOW access control system lies in the deficiencies of its authentication procedures. Exploiting this vulnerability allows a malicious actor to execute arbitrary code using specially created malware files from a remote location...

Malware Delivery via Cloud Services Exploits Unicode Trick to Deceive Users

A new attack campaign dubbed CLOUDREVERSER has been observed leveraging legitimate cloud storage services like Google Drive and Dropbox to stage malicious payloads. "The VBScript and PowerShell scripts in the CLOUDREVERSER inherently involves command-and-control-like activities by using Google...

A week in security (April 22 – April 28)

Last week on Malwarebytes Labs: Ring agrees to pay $5.6 million after cameras were used to spy on customers TikTok comes one step closer to a US ban Google ad for Facebook redirects to scam "Substantial proportion" of Americans may have had health and personal data stolen in Change Healthcare...

SuperSize Me

SuperSize Me By Floser Bacurio Jr., Bernadette Canubas, Michaelo Oliveros · April 02, 2024 Introduction Cyber attackers are always finding new ways to outsmart security systems and distribute malware effectively. We discovered an interesting detection evasion technique of delivering archive files...