Cisco Talos Blog

May 9, 2018 11:40

Gandcrab Ransomware Walks its Way onto Compromised Sites

This blog post authored by Nick Biasini with contributions from Nick Lister and Christopher Marczewski. Despite the recent decline in the prevalence of ransomware in the threat landscape, Cisco Talos has been monitoring the now widely distributed ransomware called Gandcrab. Gand

January 31, 2018 10:58

Ransom Where? Malicious Cryptocurrency Miners Takeover, Generating Millions

his post was authored by Nick Biasini, Edmund Brumaghin, Warren Mercer and Josh Reynolds with contributions from Azim Khodijbaev and David Liebenberg. Executive Summary The threat landscape is constantly changing; over the last few years malware threat vectors, methods and pay

January 22, 2018 12:29

SamSam - The Evolution Continues Netting Over $325,000 in 4 Weeks

This post was written by Vitor Ventura Introduction Talos has been working in conjunction with Cisco IR Services on what we believe to be a new variant of the SamSam ransomware. This ransomware has been observed across multiple industries including Government, Healthcare and

October 24, 2017 16:51

Threat Spotlight: Follow the Bad Rabbit

Note: This blog post discusses active research by Talos into a new threat. This information should be considered preliminary and will be updated as research continues. Update 2017-10-26 16:10 EDT: added additional information regarding the links between Nyetya and BadRabbit Upd

August 31, 2017 11:05

Back to Basics: Worm Defense in the Ransomware Age

This post was authored by Edmund Brumaghin "Those who cannot remember the past are condemned to repeat it." - George Santayana The Prequel In March 2017, Microsoft released a security update for various versions of Windows, which addressed a remote code execution vu

August 3, 2017 11:35

Taking the FIRST look at Crypt0l0cker

This post is authored by Matthew Molyett. Executive Summary In March, Talos reported on the details of Crypt0l0cker based on an extensive analysis I carried out on the sample binaries. Binaries -- plural -- because, as noted in the original blog, the Crypt0l0cker payload levera

July 5, 2017 14:22

The MeDoc Connection

Summary The Nyetya attack was a destructive ransomware variant that affected many organizations inside of Ukraine and multinational corporations with operations in Ukraine. In cooperation with Cisco Advanced Services Incident Response, Talos identified several key aspects of the

June 27, 2017 14:02

New Ransomware Variant "Nyetya" Compromises Systems Worldwide

Note: This blog post discusses active research by Talos into a new threat. This information should be considered preliminary and will be updated as research continues. Update 2017-07-06 12:30 EDT: Updated to explain the modified DoublePulsar backdoor. Since the SamSam attacks

June 21, 2017 17:00

Player 1 Limps Back Into the Ring - Hello again, Locky!

This post was authored by Alex Chiu, Warren Mercer, and Jaeson Schultz.  Sean Baird and Matthew Molyettcontributed to this post. Back in May, the Necurs spam botnet jettisoned Locky ransomware in favor of the new Jaff ransomware variant. However, earlier this month Kaspersky dis