Ukraine Warns of CABINETRAT Backdoor + XLL Add-ins Spread via Signal ZIPs The Hacker [email protected] (The Hacker News)

The Computer Emergency Response Team of Ukraine (CERT-UA) has warned of new targeted cyber attacks in the country using a backdoor called CABINETRAT.
The activity, observed in September 2025, has been attributed to a threat cluster it tracks as UAC-0245. The agency said it spotted the attack following the discovery of software tools taking the form of XLL files, which refer to Microsoft Excel The Computer Emergency Response Team of Ukraine (CERT-UA) has warned of new targeted cyber attacks in the country using a backdoor called CABINETRAT.
The activity, observed in September 2025, has been attributed to a threat cluster it tracks as UAC-0245. The agency said it spotted the attack following the discovery of software tools taking the form of XLL files, which refer to Microsoft Excel 

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