VirusTotal

The executable uses 'Sophos' in the ransom notice and the '.sophos' extension for encrypted files

19 July 2023 • 3 min read

'Fully undetectable' backdoor cannot be discovered by any security tool on VirusTotal and seems to have been developed by a skilled actor

19 October 2022 • 2 min read

One sample appears to be the same piece of malware which the US agencies warned about in May

16 August 2019 • 2 min read

Backstory is a cloud-based platform capable of analysing network data and comparing it with malicious cyber activity

05 March 2019 • 2 min read