Social EngineeringGovernmentGovernmentPhishingMulti-Stage ChainCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountFinancial credentialsHealth (basic)PHIMediumContained

City of Philadelphia

bd_a694e4af814e7d2a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 31, 2020

Filed

Aug 13, 2021

To disclose

17 months

Affected

3state residents only

Confidence

66%

Full breach record for City of Philadelphia →9 incidents on file

Supplemental notice filed by the City of Philadelphia with the NH AG regarding a phishing incident affecting employee email accounts. Unauthorized access occurred intermittently between March 11, 2020, and January 14, 2021. The breach exposed PHI, SSNs, driver's licenses, and financial data of approximately 3 additional New Hampshire residents. Notices were sent on August 6, 2021.

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Incident timeline

undetected · 20 days

discovery → filing · 17 months / 500 days

Mar 11, 2020

Begins

Mar 31, 2020

Discovered

Aug 13, 2021

Filed

vs. sector median

+61 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3 affectedView incident

Name: City of Philadelphia
norm: city of philadelphia

Name: City of Philadelphia
norm: city of philadelphia
Industry: Governmentllm

Discovered: Mar 31, 2020
Breach occurred: Mar 11, 2020 – Jan 14, 2021
Undetected for: 20 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 6, 2021
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government IDFinancial accountFinancial credentialsHealth (basic)PHI
Data elements: Social Security numberDate of birthMedical information
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General Consumer Protection Bureau
Initial access: phishing_link

During the incident: Launched an internal investigation
Resetting impacted employees’ email account passwords
Increasing monitoring of network activity
Implementing tools to enhance email security
Began a thorough review of the contents of the accounts
Providing 12 months of complimentary access to identity monitoring services through Kroll
Changes made: Updated our policies and procedures to protect against similar incidents
Reviewing our existing policies and procedures to identify ways to better prevent similar incidents from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 months(500 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/city-philadelphia-20210813.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 13, 2021
Raw hash: cf02a24b37762b68ded42e3bc677bc6b64d7e85483417892c6dad80a3118b757

Reporting entityCity of Philadelphia

Victim entityCity of Philadelphia

Incidentdiscovered Mar 31, 2020

Stated responseLaunched an internal investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov