HackingHealthcareHealthcareStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Apellis Pharmaceuticals, Inc.

bd_3510931627ac9759 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 28, 2024

Filed

Oct 4, 2024

To disclose

5 weeks

Affected

17state residents only

Linked

6 filings

Confidence

66%

Full breach record for Apellis Pharmaceuticals, Inc. →

Apellis Pharmaceuticals, Inc. notified the NH AG of a security incident where an unauthorized actor accessed an employee's email from Aug 26-27, 2024, discovered on Aug 28, 2024. 17 NH residents affected. Personal info exposed. Kroll identity monitoring offered.

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Incident timeline

undetected · 2 days

discovery → filing · 5 weeks / 37 days

Aug 26, 2024

Begins

Aug 28, 2024

Discovered

Oct 4, 2024

Filed

vs. sector median

7 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

Massachusetts State AGbd_5d26afb2c7aa56a22024-09-30 · +4dVerified
Maine State AGbd_a1121296145378bc2024-09-30 · +4dCandidate
Vermont State AGbd_1280d192e6ba9d092024-09-27 · +7dVerified
Indiana State AGbd_914bc4add331a8c92024-09-27 · +7dVerified

Show 1 more filing ↓up to 33d gap

New Hampshire State AGbd_a540d1f2efb8cc552024-11-06 · +33dVerified

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 27, 2024
Affected individuals: 17state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Performed a comprehensive review of the impacted employee’s email account
Offering identity services through Kroll
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
Changes made: Offering identity services through Kroll including credit and identity theft monitoring and counseling
Conducted enhanced awareness outreach to all employees regarding security best practices
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(37 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 · this page

New Hampshire State AG+40d

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-20241004.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 4, 2024
Raw hash: 8a099893ed0fd1aba06a35ff95a35e91daef4d1a900765f30768fc2b2f0e70bc

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityApellis Pharmaceuticals, Inc.

Victim entityApellis Pharmaceuticals, Inc.

Incidentdiscovered Aug 28, 2024

Stated responsePerformed a comprehensive review of the impacted employee’s email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov