DisclosureLens
HackingTechnologyInformationStolen CredentialsTargetedIdentity (basic)Government IDMediumContained

Prothena Biosciences Inc.

bd_4a38f5b3e7728369 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 24, 2022

Filed

Jun 2, 2022

To disclose

9 days

Affected

1state residents only

Linked

3 filings

Confidence

64%
Full breach record for Prothena Biosciences Inc.

Prothena Biosciences Inc. notified Montana residents of a data breach involving unauthorized access to an employee email account between Dec 20, 2021 and Apr 22, 2022. The attacker attempted wire fraud. Personal info including names, addresses, and SSNs may have been accessed. Prothena secured the account, engaged forensic investigators, and offered two years of credit monitoring.

Incident timeline

undetected · 155 days
discovery → filing · 9 days

Dec 20, 2021

Begins

May 24, 2022

Discovered

Jun 2, 2022

Filed

vs. sector median

17 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Filing propagation · 3 filings · 3 states

View merged incident ↗
Indiana State AGJun 2 · first
Montana State AGJun 2 · first · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.