HackingFinancial ServicesFinanceStolen CredentialsTargetedFinancial accountIdentity (basic)MediumContained

WASHINGTON STATE EMPLOYEES CREDIT UNION

bd_2810d1438511c4c5 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 27, 2023

Filed

Dec 1, 2023

To disclose

4 days

Affected

1,216state residents only

Confidence

72%

Full breach record for WASHINGTON STATE EMPLOYEES CREDIT UNION →2 incidents on file

Washington State Employees Credit Union (WSECU) reported an unauthorized access incident affecting 1,216 Washington residents. The breach occurred between October 28 and November 15, 2023, and was discovered on November 27, 2023. The cause was unauthorized access, likely involving credential compromise.

J jump to incidentP pin to compareR raw source

Washington clock✓ WA AG ≤30d4 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 30 days

discovery → filing · 4 days

Oct 28, 2023

Begins

Nov 27, 2023

Discovered

Dec 1, 2023

Filed

vs. sector median

8 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1,216 affectedView incident

Name: WASHINGTON STATE EMPLOYEES CREDIT UNION
norm: washington state employees credit union

Name: WASHINGTON STATE EMPLOYEES CREDIT UNION
norm: washington state employees credit union
Industry: Financial Servicesllm

Discovered: Nov 27, 2023
Breach occurred: Oct 28, 2023 – Nov 15, 2023
Undetected for: 30 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 1, 2023
Affected individuals: 1,216state-resident count only
Data types: —
Data elements: NameFinancial account number
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

Time to disclose: 4 days(4 days from discovery to filing)
Compliance flags: WA AG ≤30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA27154.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 1, 2023
Raw hash: 4eba5d3124add40220e933f5fe1b323e0d1ec64aa41e1db10a46992f071054f8

Reporting entityWASHINGTON STATE EMPLOYEES CREDIT UNION

Victim entityWASHINGTON STATE EMPLOYEES CREDIT UNION

Incidentdiscovered Nov 27, 2023

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com