The file app.grammmmarly.com_1-04-2020.rar is likely linked to a phishing campaign or infostealer malware using a typosquatted domain, rather than a breach of the official service. It likely contains individually stolen user credentials rather than a company-wide data leak. For tips on recognizing fraudulent communication, visit Grammarly Support . Grammarly Security Rating, Vendor Risk Report ... - UpGuard