Cisco Talos Blog

September 7, 2022 11:00

Multiple ransomware data leak sites experience DDoS attacks, facing intermittent outages and connectivity issues

Cisco Talos has been monitoring suspected distributed denial-of-service (DDoS) attacks resulting in intermittent downtime and outages affecting several ransomware-as-a-service (RaaS) data leak sites.

July 5, 2022 09:20

Researcher Spotlight: Around the security world and back again with Nick Biasini

Nick Biasini’s seen it all. Going on a nearly 20-year security career, he’s been a part of some of Cisco Talos’ largest undertakings in the company’s history. From an attack on the global Olympic Games, to a wireless router malware that affected hundreds of thousands of devices

June 28, 2022 08:00

De-anonymizing ransomware domains on the dark web

* We have developed three techniques to identify ransomware operators' dark websites hosted on public IP addresses, allowing us to uncover previously unknown infrastructure for the DarkAngels, Snatch, Quantum and Nokoyawa ransomware groups. * The methods we used to identify

June 9, 2022 08:16

Talos EMEA monthly update: Business email compromise

The latest edition of the Talos EMEA Monthly Update is available now on and Cisco's YouTube page. You can also view the episode in its entirety above. For June, Hazel and Martin got together to discuss business email compromise. BEC has quickly become the most lucr

May 31, 2022 09:00

Researcher Spotlight: Martin Lee, EMEAR lead, Talos Strategic Communications

Who knew you could connect Moses to threat intelligence? When the security community usually thinks about the origins of cybersecurity and threat intelligence, the conversation may quickly center around the codebreakers in World War II or the Creeper software developed in the 19

May 6, 2022 13:00

Threat Roundup for April 29 to May 6

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 29 and May 6. 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 ke

May 5, 2022 14:00

Threat Source newsletter (May 5, 2022) — Emotet is using up all of its nine lives

Welcome to this week’s edition of the Threat Source newsletter. Emotet made headlines last week for being “back” after a major international law enforcement takedown last year. But I’m here to argue that Emotet never left, and honestly, I’m not sure it ever will. As Nick Biasin

May 3, 2022 08:00

Conti and Hive ransomware operations: What we learned from these groups' victim chats

As part of Cisco Talos’ continuous efforts to learn more about the current ransomware landscape, we recently examined a trove of chat logs between the Conti and Hive ransomware gangs and their victims. Ransomware-as-a-service groups have exploded in popularity over the past few

March 31, 2022 16:58

On the Radar: Is 2022 the year encryption is doomed?

Senior managers responsible for information security should take stock of the encryption algorithms in use within their systems and plan their move to quantum-secure algorithms.