Cisco Talos Intelligence Blog

November 8, 2022 11:11

Emotet coming in hot

Emotet is a ubiquitous and well-known banking trojan that has evolved over the years to become a very successful modular botnet capable of dropping a variety of other threats. Even after a global takedown campaign in early 2021 disrupted the botnet, it reemerged later that year,

November 1, 2022 15:11

Threat Advisory: High Severity OpenSSL Vulnerabilities

In late October two new buffer overflow vulnerabilities, CVE-2022-3602 and CVE-2022-3786, were announced in OpenSSL versions 3.0.0 to 3.0.6. These vulnerabilities can be exploited by sending an X.509 certificate with a specially crafted email address, potentially causing a buffer

September 30, 2022 17:09

Threat Advisory: Microsoft warns of actively exploited vulnerabilities in Exchange Server

Even organizations that use Exchange Online may still be affected if they run a hybrid server.

August 16, 2022 11:08

Vulnerability Spotlight: Vulnerabilities in WWBN AVideo web app could lead to command injection, authentication bypass

Cisco Talos recently discovered multiple vulnerabilities in the WWBN AVideo web application that could allow an attacker to carry out a wide range of malicious actions, including command injection and authentication bypass. AVideo is an open-source web application that allows us

August 4, 2022 08:08

Attackers leveraging Dark Utilities "C2aaS" platform in malware campaigns

By Edmund Brumaghin, Azim Khodjibaev and Matt Thaxton, with contributions from Arnaud Zobec. Executive Summary * Dark Utilities, released in early 2022, is a platform that provides full-featured C2 capabilities to adversaries. * It is marketed as a means to enable remote acc

August 1, 2022 12:08

Vulnerability Spotlight: How misusing properly serialized data opened TCL LinkHub Mesh Wi-Fi system to 17 vulnerabilities

By Carl Hurd. The TCL LinkHub Mesh Wi-Fi system is a multi-device Wi-Fi system that allows users to expand access to their network over a large physical area. What makes the LInkHub system unique is the lack of a network interface to manage the devices individually or in the mes

July 27, 2022 12:07

Vulnerability Spotlight: How a code re-use issue led to vulnerabilities across multiple products

By Francesco Benvenuto. Recently, I was performing some research on a wireless router and noticed the following piece of code: This unescape function will revert the URL encoded bytes to its original form. But something specifically caught my attention: There was no size check

May 3, 2022 08:05

Conti and Hive ransomware operations: What we learned from these groups' victim chats

As part of Cisco Talos’ continuous efforts to learn more about the current ransomware landscape, we recently examined a trove of chat logs between the Conti and Hive ransomware gangs and their victims. Ransomware-as-a-service groups have exploded in popularity over the past few

April 26, 2022 09:04

Quarterly Report: Incident Response trends in Q1 2022

Ransomware continues as the top threat, while a novel increase in APT activity emerges Ransomware was still the top threat Cisco Talos Incident Response (CTIR) saw in active engagements this quarter, continuing a trend that started in 2020. As mentioned in the 2021 year-in-revie