CERT-UA uncovered a campaign (UAC-0245) using Signal to deliver malicious XLL files and inject the full-featured CABINETRAT backdoor. The malware evades sandboxes by checking system specs.

A cyber-espionage group known for hunting Russian organizations has upgraded its arsenal, deploying malicious Excel add-ins to slip past defenses and install a new backdoor. A new report from Inte…

The Excel format—long regarded as a harmless office staple—is increasingly being exploited as an entry point for cyberattacks.