Social EngineeringGovernmentGovernmentPhishingTargetedPIIIdentity (basic)LowContained

City of Osceola

bd_4121793fc859a4be · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 17, 2021

Filed

Jun 3, 2021

To disclose

11 weeks

Affected

1state residents only

Confidence

64%

Full breach record for City of Osceola →

The City of Osceola, Iowa notified individuals of a phishing incident where an employee's email account was compromised between Feb 24 and Mar 17, 2021. The investigation could not determine which specific emails were accessed, but some recipients had their PII in the compromised account. The City secured the account, engaged a cybersecurity firm, and offered one year of Kroll identity monitoring.

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Incident timeline

undetected · 21 days

discovery → filing · 11 weeks / 78 days

Feb 24, 2021

Begins

Mar 17, 2021

Discovered

Jun 3, 2021

Filed

vs. sector median

on median

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

Name: City of Osceola
norm: city of osceola

Name: City of Osceola
norm: city of osceola
Industry: Governmentllm

Discovered: Mar 17, 2021
Breach occurred: Feb 24, 2021 – Mar 17, 2021
Undetected for: 21 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 31, 2021
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Initial access: phishing_link

During the incident: Secured the email account
Commenced an investigation with the assistance of a cybersecurity firm
Offering a complimentary one-year membership of Kroll’s identity monitoring services
Changes made: Implemented additional safeguards to further protect personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(78 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://dojmt.gov/wp-content/uploads/OScy-notif.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 3, 2021
Raw hash: 59741f941067dab567913545f968fc36d24a70ecafe96bf4d094b22b98be758d

Reporting entityCity of Osceola

Victim entityCity of Osceola

Incidentdiscovered Mar 17, 2021

Stated responseSecured the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov