HackingGovernmentGovernmentStolen CredentialsTargetedGovernment IDPIIMediumContained

City of Arco, Idaho

bd_9fa071d6b921bbcb · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 8, 2021

Filed

Dec 3, 2021

To disclose

25 days

Affected

1state residents only

Confidence

67%

Full breach record for City of Arco, Idaho →

City of Arco notified Idaho AG of unauthorized access to an employee email account on Nov 8, 2021. One Idaho resident's driver's license number was compromised. City reset credentials, engaged forensics, and deployed EDR. Notification to the affected resident was pending at time of filing.

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Incident timeline

discovery → filing · 25 days

Nov 8, 2021

Begins

Nov 8, 2021

Discovered

Dec 3, 2021

Filed

vs. sector median

7 wks faster

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

Name: City of Arco, Idaho
norm: city of arco idaho

Name: City of Arco, Idaho
norm: city of arco idaho
Industry: Governmentllm

Discovered: Nov 8, 2021
Breach occurred: Nov 8, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: Government IDPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the Idaho ITS Chief Information Security Officer ("ITS CISO") of the incident on November 15, 2021The U.S. Department of Homeland Security is also aware of the situation
Initial access: valid_credentials

During the incident: Immediately reset the credentials for that account
Launched an investigation
Engaged legal counsel with an expertise in cybersecurity
Hired a nationally-recognized cyber security and digital forensics firm to assist with the investigation
Deployed Sentinel One, an endpoint detection and response tool to monitor system activity
Notified the Idaho ITS Chief Information Security Officer ("ITS CISO") of the incident
Provided weekly updates throughout the investigation
Changes made: Deployed Sentinel One, an endpoint detection and response tool to monitor system activity
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 25 days(25 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://ag.idaho.gov/content/uploads/2022/03/12-03-21-City-of-Arco-Idaho.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 3, 2021
Raw hash: 7e4a5e3036983f33e795a47c14046889442a8a7eeaecd85e0a683a23fe56b29c

Reporting entityCity of Arco, Idaho

Victim entityCity of Arco, Idaho

Incidentdiscovered Nov 8, 2021

Stated responseImmediately reset the credentials for that account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceag.idaho.gov