Talos is hiring for several positions — Join our world-class security organization

Cisco Talos continues to build an elite threat intelligence and research group, and we are looking for driven, innovative and diverse security enthusiasts to join us. We are currently hiring for several positions, including multiple security engineer roles and a senior vulnerability... This is on...

Case Study: Incident Response is a relationship-driven business

Proof that incident response is "the ultimate team sport" By Brad Garnett. Introduction As a seasoned incident responder, and now IR business leader here at Cisco Talos Incident Response CTIR, I have always said that incident response is the ultimate team sport. People are... This is only the...

Threat Roundup for May 7 to May 14

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between May 7 and May 14. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Talos Takes Ep. #53: The broader lesson of those air fryer vulnerabilities

By Jon Munshaw. The latest episode of Talos Takes is available now. Download this episode and subscribe to Talos Takes using the buttons below, or visit the Talos Takes page. It seemed like everyone on security Twitter had a joke when we disclosed a vulnerability in a WiFi-connected air fryer...

Transparent Tribe APT expands its Windows malware arsenal

By Asheer Malhotra, Justin Thattil and Kendall McKay. Transparent Tribe, also known as APT36 and Mythic Leopard, continues to create fake domains mimicking legitimate military and defense organizations as a core component of their operations. Cisco Talos' previous research has mainly linked this...

Vulnerability Spotlight: Code execution vulnerability in Adobe Acrobat Reader

Aleksandar Nikolic of Cisco Talos discovered this vulnerability. Blog by Jon Munshaw. Cisco Talos recently discovered an arbitrary code execution vulnerability in Adobe Acrobat Reader. Adobe Acrobat Reader is one of the most popular and feature-rich PDF readers on the market.... This is only the...

Lemon Duck Cryptojacking Botnet Changes Up Tactics

The Lemon Duck cryptocurrency-mining botnet has added the ProxyLogon group of exploits to its bag of tricks, targeting Microsoft Exchange servers. That’s according to researchers at Cisco Talos, who said that the cybercrime group behind Lemon Duck has also added the Cobalt Strike attack framework...

Threat Roundup for April 30 to May 7

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 30 and May 7. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral...

Talos Takes Ep. #52: Celebrating World Password Day by talking about getting rid of passwords

By Jon Munshaw. The latest episode of Talos Takes is available now. Download this episode and subscribe to Talos Takes using the buttons below, or visit the Talos Takes page. The internet celebrated World Password Day on Thursday. To celebrate, we had Dave Lewis on the latest episode of Talos...

Threat Roundup for April 23 to April 30

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 23 and April 30. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral... This is on...

Talos Takes Ep. #51: COVID and Tax Day have perfectly aligned for spammers

By Jon Munshaw. The latest episode of Talos Takes is available now. Download this episode and subscribe to Talos Takes using the buttons below, or visit the Talos Takes page. We see tax scams every year — people offering to do your taxes for you, finding a larger return, etc. But this... This is...

Linux Kernel Bug Opens Door to Wider Cyberattacks

An information-disclosure security vulnerability has been discovered in the Linux kernel, which can be exploited to expose information in the kernel stack memory of vulnerable devices. Specifically, the bug CVE-2020-28588 exists in the /proc/pid/syscall functionality of 32-bit ARM devices running...

Vulnerability Spotlight: Information disclosure vulnerability in the Linux Kernel

Lilith and Claudio Bozzato of Cisco Talos discovered this vulnerability. Blog by Jon Munshaw. Cisco Talos recently discovered an information disclosure vulnerability in the Linux Kernel. The Linux Kernel is the free and open-source core of Unix-like operating systems.... This is only the beginnin...

Threat Roundup for April 16 to April 23

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 16 and April 23. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral... This is on...

Prometei Botnet Exploiting Unpatched Microsoft Exchange Servers

Attackers are exploiting the ProxyLogon Microsoft Exchange Server flaws to co-opt vulnerable machines to a cryptocurrency botnet named Prometei, according to new research. "Prometei exploits the recently disclosed Microsoft Exchange vulnerabilities associated with the HAFNIUM attacks to penetrate...

Talos Takes Ep. #50: Just like us, attackers are using Slack and Discord now more than ever

By Jon Munshaw. The latest episode of Talos Takes is available now. Download this episode and subscribe to Talos Takes using the buttons below, or visit the Talos Takes page. With more workers than ever going remote due to the COVID-19 pandemic, the popularity of collaboration apps like... This i...

Threat Source Newsletter (April 22, 2021)

Newsletter compiled by Jon Munshaw. Good afternoon, Talos readers. We went viral this week! Everyone seemed to love to joke about these vulnerabilities we discovered in a WiFi-connected air fryer. An attacker, if they had physical access to the device, could exploit these... This is only the...

A year of Fajan evolution and Bloomberg themed campaigns

By Vanja Svajcer. News summarySome malware campaigns are designed to spread malware to as many people as possible — while some others carefully choose their targets. Cisco Talos recently discovered a malware campaign that does not fit in any of the two categories. This actor has a relatively low...

Novel Email-Based Campaign Targets Bloomberg Clients with RATs

A new email-based campaign by an emerging threat actor aims to spread various remote access trojans RATs to a very specific group of targets who use Bloomberg’s industry-based services. Cisco Talos Intelligence researchers discovered the campaign, dubbing it and its perpetrator “Fajan,” and...

Vulnerability Spotlight: Multiple vulnerabilities in Synology DiskStation Manager

Claudio Bozzato of Cisco Talos discovered these vulnerabilities. Blog by Jon Munshaw. Cisco Talos recently discovered multiple vulnerabilities in Synology DiskStation Manager. DSM is the Linux-based operating system for every Synology network-attached storage device NAS. The... This is only the...