HackingFinancial ServicesFinanceStolen CredentialsTargetedIdentity (basic)Government IDMediumContained

CO-OP Credit Union

bd_9691da1bb598b7a7 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 10, 2020

Filed

Dec 14, 2020

To disclose

5 weeks

Affected

1state residents only

Confidence

64%

Full breach record for CO-OP Credit Union →2 incidents on file

Co-op Credit Union notified Montana, Iowa, and Maryland residents of unauthorized access to employee email accounts containing names and SSNs. Access occurred Sept 22-29, 2020; discovered Nov 10, 2020. Forensic firm engaged; accounts secured. No fraud detected. One-year Experian IdentityWorks offered.

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Incident timeline

undetected · 49 days

discovery → filing · 5 weeks / 34 days

Sep 22, 2020

Begins

Nov 10, 2020

Discovered

Dec 14, 2020

Filed

vs. sector median

4 wks faster

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

Name: CO-OP Credit Union
norm: co op credit union

Name: CO-OP Credit Union
norm: co op credit union
Industry: Financial Servicesllm

Discovered: Nov 10, 2020
Breach occurred: Sep 22, 2020 – Sep 29, 2020
Undetected for: 49 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 14, 2020
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Secured the email accounts to prevent any further access
Engaged a leading forensic security firm to investigate and confirm the security of our email and computer systems
Offering you a complimentary one-year membership to Experian IdentityWorks SM Credit 3B
Changes made: Enhancing our technical security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(34 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/coopSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 14, 2020
Raw hash: cfa0a1504972ab7447d27a226e418f5e3474539b355b8b12ec06cb1934c02060

Reporting entityCO-OP Credit Union

Victim entityCO-OP Credit Union

Incidentdiscovered Nov 10, 2020

Stated responseSecured the email accounts to prevent any further access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov