Cisco Talos Blog

July 11, 2024 06:00

Impact of data breaches is fueling scam campaigns

Data breaches have become one of the most crucial threats to organizations across the globe, and they’ve only become more prevalent and serious over time.

July 10, 2024 08:00

Hidden between the tags: Insights into spammers’ evasion techniques in HTML Smuggling

Talos is releasing a new list of CyberChef recipes that enable faster and easier reversal of encoded JavaScript code contained in the observed HTML attachments.

July 10, 2024 06:00

Inside the ransomware playbook: Analyzing attack chains and mapping common TTPs

Based on a comprehensive review of more than a dozen prominent ransomware groups, we identified several commonalities in TTPs, along with several notable differences and outliers.

June 27, 2024 08:01

Snowflake isn’t an outlier, it’s the canary in the coal mine

By Nick Biasini with contributions from Kendall McKay and Guilherme Venere Headlines continue to roll in about the many implications and follow-on attacks originating from leaked and/or stolen credentials for the Snowflake cloud data platform. Adversaries obtained stolen login

June 18, 2024 07:57

How are attackers trying to bypass MFA?

Exploring trends on how attackers are trying to manipulate and bypass MFA, as well as when/how attackers will try their 'push-spray' MFA attacks

April 2, 2024 08:00

Adversaries are leveraging remote access tools now more than ever — here’s how to stop them

While there are many legitimate uses for this software, adversaries are also finding ways to use them for command and control in their campaigns.

March 13, 2024 08:00

Threat actors leverage document publishing sites for ongoing credential and session token theft

Talos IR has responded to several recent incidents in which threat actors used legitimate digital document publishing sites such as Publuu and Marq to host phishing documents as part of ongoing credential and session harvesting attacks.

March 7, 2024 10:00

The 3 most common post-compromise tactics on network infrastructure

We discuss three of the most common post-compromise tactics that Talos has observed in our threat telemetry and Cisco Talos Incident Response (Talos IR) engagements. These include modifying the device’s firmware, uploading customized/weaponized firmware, and bypassing security measures.

February 28, 2024 08:00

Stop running security in passive mode

As we begin a new year, we wanted to address one of the biggest issues we consistently see in our investigations: passive security.  Incident response engagements are an important part of our work and the intelligence-gathering process and their associated reports can be a treas