Cisco Talos Intelligence Blog

June 21, 2022 07:06

Avos ransomware group expands with new attack arsenal

By Flavio Costa, * In a recent customer engagement, we observed a month-long AvosLocker campaign. * The attackers utilized several different tools, including Cobalt Strike, Sliver and multiple commercial network scanners. * The initial ingress point in this incident was a pa

May 18, 2022 02:05

The BlackByte ransomware group is striking users all over the globe

News summary * Cisco Talos has been monitoring the BlackByte Ransomware Group for several months, infecting victims all over the world, from North America to Colombia, Netherlands, China, Mexico and Vietnam. * The FBI released a joint cybersecurity advisory in February 2022 wa

January 7, 2022 16:01

Threat Roundup for December 31 to January 7

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Dec. 31 and Jan. 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

December 3, 2021 15:12

Threat Roundup for November 26 to December 3

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Nov. 26 and Dec. 3. 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

November 19, 2021 14:11

Threat Roundup for November 12 to November 19

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Nov. 12 and Nov. 19. 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 behaviora

November 10, 2021 17:11

North Korean attackers use malicious blogs to deliver malware to high-profile South Korean targets

* Cisco Talos has observed a new malware campaign operated by the Kimsuky APT group since June 2021. * Kimsuky, also known as Thallium and Black Banshee, is a North Korean state-sponsored advanced persistent threat (APT) group active since 2012. * This campaign utilizes malici

November 5, 2021 13:11

Threat Roundup for October 29 to November 5

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Oct. 29 and Nov. 5. 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

November 3, 2021 08:11

Microsoft Exchange vulnerabilities exploited once again for ransomware, this time with Babuk

By Chetan Raghuprasad and Vanja Svajcer, with contributions from Caitlin Huey. * Cisco Talos recently discovered a malicious campaign deploying variants of the Babuk ransomware predominantly affecting users in the U.S. with smaller number of infections in U.K., Germany, Ukraine

October 28, 2021 08:10

Quarterly Report: Incident Response trends from Q3 2021

Ransomware again dominated the threat landscape, while BEC grew By David Liebenberg and Caitlin Huey. Once again, ransomware was the most dominant threat observed in Cisco Talos Incident Response (CTIR) engagements this quarter. CTIR helped resolve several significant ransomwa