A hacker going online by the moniker AmFearLiathMor is claiming to have hacked the most popular end-to-end encrypted email service ProtonMail.
At the time it is not clear if the hacker belongs to a cyber crime gang, it claims to have stolen a “significant” amounts of data from the company.
The ransom demand (archive.is link) was posted on Pastebin, the hacker claims to have compromised user’s email and also accused ProtonMail of sending user’s decrypted data to American servers.
AmFearLiathMor also wrote that ProtonMail hasn’t configured the mandatory Subresource Integrity (SRI) allowing tampering and data collection.
“We hacked Protonmail and have a significant amount of their data from the past few months. We are offering it back to Protonmail for a small fee, if they decline then we will publish or sell user data to the world.” wrote the hacker.
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