olemus
petuhelistus, või -kiri, mis väidab pakkuvat tehnilist tuge
= fraud activity in which a scammer claims to offer a legitimate technical support service

ülevaateid
https://en.wikipedia.org/wiki/Technical_support_scam

https://securityboulevard.com/2019/09/tech-support-scams-and-what-they-mean/

https://www.comparitech.com/blog/information-security/tech-support-scams/

https://www.consumer.ftc.gov/articles/how-spot-avoid-and-report-tech-support-scams

https://arxiv.org/pdf/1607.06891.pdf