MalwareOtherRansomwareData EncryptedData ExfiltratedGovernment IDIdentity (basic)HighContained

Great Northern Corporation

bd_012fcfcd4fcb7b34 · schema v1 · pii pii-v1

Severity

High

Discovered

Dec 21, 2020

Filed

Feb 9, 2021

To disclose

7 weeks

Affected · nationwide

5,0971 in this filing

Linked

3 filings

Confidence

66%

Full breach record for Great Northern Corporation →2 incidents on file

Great Northern Corporation, a commercial entity based in Appleton, WI, reported a ransomware incident on September 5, 2020, discovered on December 21, 2020. The breach affected 5,097 individuals, including one Maine resident. Personal information, specifically Social Security Numbers, was compromised. The company provided 12 months of credit monitoring through TransUnion.

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Incident timeline

undetected · 107 days

discovery → filing · 7 weeks / 50 days

Sep 5, 2020

Begins

Dec 21, 2020

Discovered

Feb 9, 2021

Filed

vs. sector median

1 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_24c25d4bf466e54f2021-02-09Verified
Indiana State AGbd_afed8c1c3000916d2021-02-09Verified

Name: Great Northern Corporation
norm: great northern
Domain: greatnortherncorp.com

Name: Great Northern Corporation
norm: great northern
Domain: greatnortherncorp.com
Industry: Otherllm

Discovered: Dec 21, 2020
Breach occurred: Sep 5, 2020
Undetected for: 107 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 9, 2020
Affected individuals: 5,097state + nationwide
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Filed data breach notice with Maine Attorney General
Initial access: exploit_public_facing

During the incident: Sent written notification to affected consumers
Offered 12 months of identity and credit monitoring services through TransUnion via Epiq
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(50 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGFeb 9 · first

Indiana State AGFeb 9 · first

Maine State AGFeb 9 · first · this page

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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/1acf1e4c-b3e2-43f8-9837-b144ac91a655.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 9, 2021
Raw hash: 6a58ff2bbab12274e5aead876cb3c747cd7e9ee49f56b095ce102808edf27dd6

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityGreat Northern Corporation

Victim entityGreat Northern Corporation

Incidentdiscovered Dec 21, 2020

Stated responseSent written notification to affected consumers

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov