Great Plains Bank Corporation

Great Plains Bank Corporation fell victim to a ransomware attack on November 21, 2024, compromising the personal information of 7,767 individuals, including at least one Maine resident. The breach exposed sensitive data, prompting the bank to offer identity theft protection services to affected individuals as a mitigating measure. While the exact nature of the stolen data (e.g., financial records, Social Security numbers, or other personally identifiable information) was not explicitly detailed, the scale of the incident—affecting thousands—suggests a significant operational and reputational risk. The attack disrupted trust in the bank’s cybersecurity posture and necessitated regulatory disclosure under data breach notification laws. The provision of credit monitoring indicates the potential for fraud or financial harm to customers, though no immediate evidence of large-scale exploitation (e.g., mass fraud or systemic outages) was reported. The incident underscores the growing threat of ransomware targeting financial institutions, where customer data integrity is critical to business continuity.

Source: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/2c82f29f-8ded-4cce-80bc-d2eaaf6d799b.html

TPRM report: https://www.rankiteo.com/company/great-plains-national-bank

"id": "gre505091625",
"linkid": "great-plains-national-bank",
"type": "Ransomware",
"date": "11/2024",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"

{'affected_entities': [{'customers_affected': 7767,
                        'industry': 'financial services',
                        'name': 'Great Plains Bank Corporation',
                        'type': 'bank'}],
 'customer_advisories': {'identity_theft_protection_offered': True},
 'data_breach': {'number_of_records_exposed': 7767,
                 'personally_identifiable_information': True,
                 'type_of_data_compromised': ['personal information']},
 'date_detected': '2024-11-21',
 'description': 'The Maine Office of the Attorney General reported that Great '
                'Plains Bank Corporation experienced a ransomware attack on '
                'November 21, 2024, potentially affecting the personal '
                'information of one Maine resident. The total number of '
                'individuals affected is 7,767, and identity theft protection '
                'services are being offered to those potentially impacted.',
 'impact': {'data_compromised': True, 'identity_theft_risk': True},
 'references': [{'source': 'Maine Office of the Attorney General'}],
 'regulatory_compliance': {'regulatory_notifications': {'maine_attorney_general': True}},
 'response': {'remediation_measures': {'identity_theft_protection_services': True}},
 'title': 'Ransomware Attack on Great Plains Bank Corporation',
 'type': 'ransomware'}