Cisco Talos
Threat Roundup for November 13 to November 20
Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between November 13 and November 20. 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, indicators of compromise, and discussing how our customers are automatically […]
Back from vacation: Analyzing Emotet’s activity in 2020
By Nick Biasini, Edmund Brumaghin, and Jaeson Schultz. Emotet is one of the most heavily distributed malware families today. Cisco Talos observes large quantities of Emotet emails being sent to individuals and organizations around the world on an almost daily basis. These emails are typically sent automatically by previously infected systems attempting to infect […]
Nibiru ransomware variant decryptor
Nikhil Hegde developed this tool. Weak encryption The Nibiru ransomware is a .NET-based malware family. It traverses directories in the local disks, encrypts files with Rijndael-256 and gives them a .Nibiru extension. Rijndael-256 is a secure encryption algorithm. However, Nibiru uses a hard-coded string “Nibiru” to compute the 32-byte key and 16-byte IV values. The […]
Threat Roundup for November 6 to November 13
Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between November 6 and November 13. 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, indicators of compromise, and discussing how our customers are automatically […]
Threat Roundup for October 30 to November 6
Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between October 30 and November 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 key behavioral characteristics, indicators of compromise, and discussing how our customers are […]
The future of security operations
Podcast discussion on where data security is going next, including how organizations can manage the risk of sensitive data, and how security operations centres will evolve to become even more privacy-centric.
Threat Roundup for October 23 to October 30
Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between October 23 and October 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 characteristics, indicators of compromise, and discussing how our customers are […]
Cisco Talos Advisory on Adversaries Targeting the Healthcare and Public Health Sector
Background Cisco Talos has become aware that an adversary is leveraging Trickbot banking trojan and Ryuk ransomware to target U.S. hospitals and healthcare providers at an increasing rate. Security journalists reported on October 28, 2020 that the adversary was preparing to encrypt systems at “potentially hundreds” of medical centers and hospitals, based on a tip from a […]
Threat Roundup for October 16 to October 23
Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between October 16 and October 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 characteristics, indicators of compromise, and discussing how our customers are […]