Social EngineeringHealthcareHealthcarePhishingStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

EISAI INC.

bd_bde2df2d38761500 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 15, 2020

Filed

Sep 11, 2020

To disclose

17 weeks

Affected

49state residents only

Linked

3 filings

Confidence

66%

Full breach record for EISAI INC. →5 incidents on file

Eisai Inc. notified the New Hampshire AG of a phishing incident targeting employee email accounts. Suspicious login activity occurred between May 7-15, 2020. The incident affected 49 NH residents, exposing names, tax IDs, driver's licenses, passports, signatures, and financial account numbers. Eisai secured the account, engaged forensic investigators, and provided 24 months of credit monitoring.

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Incident timeline

undetected · 8 days

discovery → filing · 17 weeks / 119 days

May 7, 2020

Begins

May 15, 2020

Discovered

Sep 11, 2020

Filed

vs. sector median

+4 wks slower

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

Massachusetts State AGbd_bcae81019cb482152020-09-11Verified
Indiana State AGbd_187f8d22369b98c32020-09-10 · +1dVerified

Name: EISAI INC.
norm: eisai
Domain: eisai.com

Name: EISAI INC.
norm: eisai
Domain: eisai.com
Industry: Healthcarellm

Discovered: May 15, 2020
Breach occurred: May 7, 2020 – May 15, 2020
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 10, 2020
Affected individuals: 49state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Office of the Attorney General
Initial access: phishing_link

During the incident: Launched an investigation with the assistance of a leading cybersecurity firm
Secured the relevant email account
Continues to monitor for suspicious activity
Continues to enhance its identity, authentication and remote access controls
Educate its workforce about cybersecurity issues
Providing them with access to 24 months of Experian Identity Works identity protection services
Changes made: Enhancing identity, authentication and remote access controls
Educating workforce about cybersecurity issues
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(119 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Indiana State AGSep 10 · first

Massachusetts State AG+1d

New Hampshire State AG+1d · 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.

Source URL: https://mm.nh.gov/files/uploads/doj/remote-docs/eisai-20200911.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 11, 2020
Raw hash: b65c8b9c4fb5d57c47a515610551c27fe8a28ac4c524cb59653d536487ffde46

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityEISAI INC.

Victim entityEISAI INC.

Incidentdiscovered May 15, 2020

Stated responseLaunched an investigation with the assistance of a leading cybersecurity firm

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov