Social EngineeringGovernmentGovernmentPhishingCustomer Data InvolvedEmployee Data InvolvedTargetedIdentity (basic)Government IDMediumContained

Chester County, Pennsylvania

bd_09bc89854cfe476d · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 29, 2019

Filed

Nov 20, 2019

To disclose

12 weeks

Affected · nationwide

51 in this filing

Confidence

66%

Full breach record for Chester County, Pennsylvania →

Chester County, Pennsylvania, notified the New Hampshire Attorney General of a phishing incident affecting five county employee email accounts. Unauthorized access occurred between August 3 and September 5, 2019. The breach exposed names, Social Security numbers, and driver's license numbers of one New Hampshire resident. The County disabled accounts, reset passwords, and offered one year of identity theft protection services.

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Incident timeline

undetected · 26 days

discovery → filing · 12 weeks / 83 days

Aug 3, 2019

Begins

Aug 29, 2019

Discovered

Nov 20, 2019

Filed

vs. sector median

+1 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed5 affectedView incident

Name: Chester County, Pennsylvania
norm: chester county pennsylvania

Name: Chester County, Pennsylvania
norm: chester county pennsylvania
Industry: Governmentllm

Discovered: Aug 29, 2019
Breach occurred: Aug 3, 2019 – Sep 5, 2019
Undetected for: 26 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 13, 2019
Affected individuals: 5state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General's Consumer Protection Bureau
Initial access: phishing_link

During the incident: Disabled the affected email accounts
Had the users reset their passwords
Scanned its email system to detect and neutralize any potentially dangerous emails or unauthorized activity
Changes made: Closely monitoring and restricting outside access to its systems
Increasing password complexity requirements
Adding two factor authentication for remote access
Strengthening its filtering to help block dangerous emails
Updating its response procedures to more quickly and effectively respond to incidents
Enhancing its cyber training and providing regular communications in order to increase cyber awareness
Regularly reviewing email boxes to remove or archive outdated information that the County no longer needs
Offering one (1) year of identity theft protection services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(83 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/chester-county-pennsylvania-20192011.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 20, 2019
Raw hash: 7a5ae29468f853ddd047a25153f39c1331e4fe3e2f20924ff32151130ba353fa

Reporting entityChester County, Pennsylvania

Victim entityChester County, Pennsylvania

Incidentdiscovered Aug 29, 2019

Stated responseDisabled the affected email accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov