Cisco Talos

December 18, 2020

THREAT RESEARCH

Threat Roundup for December 11 to December 18

Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between December 11 and December 18. 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 […]

December 17, 2020

THREAT RESEARCH

Talos Tools of the Trade

If you’re looking for something to keep you busy while we’re all stuck inside during the holidays, Cisco Talos has a few tools for you you can play with in the coming days and weeks. We recently updated GhIDA to work with the latest version of IDA and we are releasing new features for the […]

December 16, 2020

SECURITY

Security Stories review of the year, with Fareedah Shaheed and Ben Munroe

We review the most impactful security events of 2020, and welcome our guest Fareedah Shaheed. As well as being a well renowned security expert and entrepreneur, Fareedah has just been named on Forbes’ list of 30 under 30 for those who are making waves in enterprise technology.

December 11, 2020

THREAT RESEARCH

Threat Roundup for December 4 to December 11

Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between December 4 and December 11. 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 […]

December 9, 2020

THREAT RESEARCH

FireEye Breach Detection Guidance

Cyber security firm FireEye recently disclosed an incident that was reported to have resulted in the inadvertent disclosure of various internally developed offensive security tools (OSTs) that were used across FireEye red-team engagements. Some of these tools appear to be based on well-known offensive frameworks like Cobalt Strike. This is even evident in the naming […]

December 4, 2020

THREAT RESEARCH

Threat Roundup for November 27 to December 4

Today, Talos is publishing a glimpse into the most prevalent threats we’ve observed between November 27 and December 4. 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 […]

November 20, 2020

THREAT RESEARCH

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 […]

November 18, 2020

THREAT RESEARCH

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 […]

November 17, 2020

THREAT RESEARCH

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 […]