Catégorie : Actualités

Microsoft, Adobe, and Google all issued security updates to their products today. The Microsoft patches include six previously disclosed security flaws, and one that is already being actively exploited. But this month’s Patch Tuesday is overshadowed by the “Log4Shell” 0-day exploit in a popular Java library that web server administrators are now racing to find and patch amid widespread exploitation of the flaw. Log4Shell is the name picked for a critical flaw disclosed Dec. 9 in the popular logging library for Java called “log4j,” which is included in a huge number of Java applications. Publicly released exploit code allows an attacker to force a server running a vulnerable log4j library to execute commands, such as downloading malicious software or opening a backdoor connection to the server. According to researchers at…

Posted by Jon Bottarini, Security Program Manager & Lena Katib, Strategic Partnerships Manager The external security researcher community plays an integral role in making the Google Play ecosystem safe and secure. Through this partnership with the community, Google has been able to collaborate with third-party developers to fix thousands of security issues in Android applications before they are exploited and reward security researchers for their hard work and dedication. In order to empower the next generation of Android security researchers, Google has collaborated with industry partners including HackerOne and PayPal to host a number of Android App Hacking Workshops. These workshops are an effort designed to educate security researchers and cybersecurity students of all skill levels on how to find Android application vulnerabilities through a series of hands-on working sessions,…

The consulting firm PricewaterhouseCoopers recently published lessons learned from the disruptive and costly ransomware attack in May 2021 on Ireland’s public health system. The unusually candid post-mortem found that nearly two months elapsed between the initial intrusion and the launching of the ransomware. It also found affected hospitals had tens of thousands of outdated Windows 7 systems, and that the health system’s IT administrators failed to respond to multiple warning signs that a massive attack was imminent. PWC’s timeline of the days leading up to the deployment of Conti ransomware on May 14. Ireland’s Health Service Executive (HSE), which operates the country’s public health system, got hit with Conti ransomware on May 14, 2021. A timeline in the report (above) says the initial infection of the “patient zero” workstation happened…

A 31-year-old Canadian man has been arrested and charged with fraud in connection with numerous ransomware attacks against businesses, government agencies and private citizens throughout Canada and the United States. Canadian authorities describe him as “the most prolific cybercriminal we’ve identified in Canada,” but so far they’ve released few other details about the investigation or the defendant. Helpfully, an email address and nickname apparently connected to the accused offer some additional clues. Matthew Filbert, in 2016. Matthew Philbert of Ottawa, Ontario was charged with fraud and conspiracy in a joint law enforcement action by Canadian and U.S. authorities dubbed “Project CODA.” The Ontario Provincial Police (OPP) on Tuesday said the investigation began in January 2020 when the U.S. Federal Bureau of Investigation (FBI) contacted them regarding ransomware attacks that were…

Rarely do cybercriminal gangs that deploy ransomware gain the initial access to the target themselves. More commonly, that access is purchased from a cybercriminal broker who specializes in acquiring remote access credentials — such as usernames and passwords needed to remotely connect to the target’s network. In this post we’ll look at the clues left behind by “Babam,” the handle chosen by a cybercriminal who has sold such access to ransomware groups on many occasions over the past few years. Since the beginning of 2020, Babam has set up numerous auctions on the Russian-language cybercrime forum Exploit, mainly selling virtual private networking (VPN) credentials stolen from various companies. Babam has authored more than 270 posts since joining Exploit in 2015, including dozens of sales threads. However, none of Babam’s posts…

Posted by Fabricio Voznika and Mauricio Poppe, Google Cloud  Kubernetes Security is constantly evolving - keeping pace with enhanced functionality, usability and flexibility while also balancing the security needs of a wide and diverse set of use-cases. Recently, the GKE Security team discovered a high severity vulnerability that allowed workloads to have access to parts of the host filesystem outside the mounted volumes boundaries. Although the vulnerability was patched back in September we thought it would be beneficial to write up a more in-depth analysis of the issue to share with the community. We assessed the impact of the vulnerability as described in vulnerability management in open-source Kubernetes and worked closely with the GKE Storage team and the Kubernetes Security Response Committee to find a fix. In this post we’ll…

In January 2021, technology vendor Ubiquiti Inc. [NYSE:UI] disclosed that a breach at a third party cloud provider had exposed customer account credentials. In March, a Ubiquiti employee warned that the company had drastically understated the scope of the incident, and that the third-party cloud provider claim was a fabrication. On Wednesday, a former Ubiquiti developer was arrested and charged with stealing data and trying to extort his employer while pretending to be a whistleblower. Federal prosecutors say Nickolas Sharp, a senior developer at Ubiquiti, actually caused the “breach” that forced Ubiquiti to disclose a cybersecurity incident in January. They allege that in late December 2020, Sharp applied for a job at another technology company, and then abused his privileged access to Ubiquiti’s systems at Amazon’s AWS cloud service and…

A visualization of the Internet made using network routing data. Image: Barrett Lyon, opte.org. Imagine being able to disconnect or redirect Internet traffic destined for some of the world’s biggest companies — just by spoofing an email. This is the nature of a threat vector recently removed by a Fortune 500 firm that operates one of the largest Internet backbones. Based in Monroe, La., Lumen Technologies Inc. [NYSE: LUMN] (formerly CenturyLink) is one of more than two dozen entities that operate what’s known as an Internet Routing Registry (IRR). These IRRs maintain routing databases used by network operators to register their assigned network resources — i.e., the Internet addresses that have been allocated to their organization. The data maintained by the IRRs help keep track of which organizations have the…

In August, KrebsOnSecurity warned that scammers were contacting people and asking them to unleash ransomware inside their employer’s network, in exchange for a percentage of any ransom amount paid by the victim company. This week, authorities in Nigeria arrested a suspect in connection with the scheme — a young man who said he was trying to save up money to help fund a new social network. Image: Abnormal Security. The brazen approach targeting disgruntled employees was first spotted by threat intelligence firm Abnormal Security, which described what happened after they adopted a fake persona and responded to the proposal in the screenshot above. “According to this actor, he had originally intended to send his targets—all senior-level executives—phishing emails to compromise their accounts, but after that was unsuccessful, he pivoted to…

One of the more common ways cybercriminals cash out access to bank accounts involves draining the victim’s funds via Zelle, a “peer-to-peer” (P2P) payment service used by many financial institutions that allows customers to quickly send cash to friends and family. Naturally, a great deal of phishing schemes that precede these bank account takeovers begin with a spoofed text message from the target’s bank warning about a suspicious Zelle transfer. What follows is a deep dive into how this increasingly clever Zelle fraud scam typically works, and what victims can do about it. Last week’s story warned that scammers are blasting out text messages about suspicious bank transfers as a pretext for immediately calling and scamming anyone who responds via text. Here’s what one of those scam messages looks like:…