What Talos Incident Response learned from a recent Qakbot attack hijacking old email threads
By Nate Pors and Terryn Valikodath. Executive summary * In a recent malspam campaign delivering the Qakbot banking trojan, Cisco Talos Incident Response (CTIR) observed the adversary using aggregated, old email threads from multiple organizations that we assess were likely ha
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
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
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 ke
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 ke
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 k
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
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 ke
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