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Email-based attacks aren’t relics of the past. They’re active, sophisticated, and increasingly lucrative for attackers. 

This issue of the Counter Threat Unit’s high-level bimonthly report discusses noteworthy updates in the threat landscape during July and August

Secure by Design

On October 15, 2025, F5 reported that a nation-state threat actor had gained long-term access to some F5 systems and exfiltrated data, including source code and information about undisclosed product vulnerabilities. This information may enable threat actors to compromise F5 devices by developing exploits for these vulnerabilities. The UK National Cyber Security Centre also notes…

Microsoft throws a farewell party for Win10, Office 2016, and Office 2019… a very big party

Explore the causes and consequences of ransomware in 2025 based on findings from a vendor-agnostic survey of 3,400 organizations hit by ransomware in the last year.

An extremely Windows-heavy month, with a surprise cameo by… Sophos?!

The first service combining the power of Sophos and Secureworks.

A simple customer query leads to a rabbit hole of backdoored malware and game cheats

Customers have recognized Sophos for the 4th consecutive time