Social EngineeringHealthcareHealthcarePhishingStolen CredentialsCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDMediumContained

Apellis Pharmaceuticals, Inc.

bd_a540d1f2efb8cc55 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 28, 2024

Filed

Nov 6, 2024

To disclose

10 weeks

Affected

18state residents only

Linked

6 filings

Confidence

66%

Full breach record for Apellis Pharmaceuticals, Inc. →

Apellis Pharmaceuticals filed a supplemental notice with the NH AG, increasing affected NH residents from 17 to 18. Unauthorized actor accessed employee email Aug 26-27, 2024; discovered Aug 28. PII and SSN exposed. Kroll identity monitoring offered.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 2 days

discovery → filing · 10 weeks / 70 days

Aug 26, 2024

Begins

Aug 28, 2024

Discovered

Nov 6, 2024

Filed

vs. sector median

2 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

New Hampshire State AGbd_3510931627ac97592024-10-04 · +33dVerified
Massachusetts State AGbd_5d26afb2c7aa56a22024-09-30 · +37dVerified
Maine State AGbd_a1121296145378bc2024-09-30 · +37dCandidate
Vermont State AGbd_1280d192e6ba9d092024-09-27 · +40dVerified

Show 1 more filing ↓up to 40d gap

Indiana State AGbd_914bc4add331a8c92024-09-27 · +40dVerified

Name: Apellis Pharmaceuticals, Inc.
norm: apellis pharmaceuticals

Name: Apellis Pharmaceuticals, Inc.
norm: apellis pharmaceuticals
Industry: Healthcarellm

Discovered: Aug 28, 2024
Breach occurred: Aug 26, 2024 – Aug 27, 2024
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 30, 2024
Affected individuals: 18state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Reviewing accounts and files that could have been accessed
Conducting malware scans
Remediating malicious content
Resetting impacted accounts
Conducted enhanced awareness outreach to all employees regarding security best practices
Arranged to make available to you of identity monitoring provided by Kroll at no charge
Changes made: Conducted enhanced awareness outreach to all employees regarding security best practices
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 5 states

View merged incident ↗

Vermont State AGSep 27 · first

Indiana State AGSep 27 · first

Massachusetts State AG+3d

Maine State AG+3d

New Hampshire State AG+7d

New Hampshire State AG+40d · this page

Pattern: first filing Sep 27 (VT), last Nov 6 (NH) — a 40-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/apellis-pharmaceuticals-20241106.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 6, 2024
Raw hash: 7335f3c26100e454d5d081e642398f20f1312dfb599d90a876e11df9cac4d3f9

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityApellis Pharmaceuticals, Inc.

Victim entityApellis Pharmaceuticals, Inc.

Incidentdiscovered Aug 28, 2024

Stated responseReviewing accounts and files that could have been accessed

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov