Social EngineeringHealthcareHealthcarePhishingEmployee Data InvolvedIdentity (basic)Government IDMediumActive

EISAI INC.

bd_66dda7cb06263826 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 22, 2019

Filed

Apr 4, 2019

To disclose

10 weeks

Affected

1state residents only

Confidence

66%

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

Eisai, Inc. notified the NH Attorney General of a phishing incident targeting employee email accounts. On January 22, 2019, employees received phishing emails with links. Investigation confirmed one NH resident's name and driver's license number were in an accessed account, though no unauthorized access was confirmed. Eisai secured accounts and is enhancing security controls.

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Incident timeline

discovery → filing · 10 weeks / 72 days

Jan 22, 2019

Begins

Jan 22, 2019

Discovered

Apr 4, 2019

Filed

vs. sector median

2 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

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

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

Discovered: Jan 22, 2019
Breach occurred: Jan 22, 2019
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 27, 2019
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: Provided notice to the Office of the Attorney General, State of New Hampshire
Initial access: phishing_link

During the incident: Launched an investigation into this incident with the assistance of a leading cyber investigative firm
Secured each email account
Continue to monitor for suspicious activity
Changes made: Continuing to enhance our identity, authentication and remote access controls
Educate our workforce about cybersecurity issues
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(72 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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-20190404.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 4, 2019
Raw hash: bc92835f79e892a8ebc18d2b4196fcb30ed04f57d657d72f5a9668b5a98a45b9

Reporting entityEISAI INC.

Victim entityEISAI INC.

Incidentdiscovered Jan 22, 2019

Stated responseLaunched an investigation into this incident with the assistance of a leading cyber investigative firm

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov