Anderson Brothers Bank: Anderson Bank Data Breach Lawsuit Investigation

Anderson Brothers Bank: Anderson Bank Data Breach Lawsuit Investigation

Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Anderson Bancshares, Inc. data breach.

If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.

About Anderson Bancshares, Inc.

Anderson Bancshares Inc. is a privately held bank holding company based in Mullins, South Carolina. The company was established in 1986 and is the parent company of Anderson Brothers Bank, a community-oriented bank that has served South Carolina since 1933.

Anderson Brothers Bank operates 25 branches across 17 communities in the Pee Dee, coastal and Low Country regions of South Carolina. The bank offers a full range of personal and business banking services, including loans, deposit products and digital banking.

What Happened?

In October 2025, Anderson Bancshares Inc. learned that a third-party vendor, Marquis Software Solutions, experienced a data breach. An unauthorized third party gained access to personal information on Marquis systems as early as Aug. 14, 2025. Marquis notified Anderson Bancshares Inc. of the incident on Oct. 28, 2025.

The investigation revealed that the breach did not involve Anderson Brothers Bank’s internal systems but did impact customer information stored with the vendor. Written notice was sent to affected individuals on Dec. 5, 2025.

Information exposed:

Names

Dates of birth

Social Sec

Source: https://www.claimdepot.com/investigations/anderson-bank-data-breach-2025

TPRM report: https://www.rankiteo.com/company/anderson-brothers-bank

"id": "and1765079791",
"linkid": "anderson-brothers-bank",
"type": "Breach",
"date": "2025-12-05T00:00:00.000Z",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"
{'incident': {'affected_entities': [{'customers_affected': None,
                                     'industry': 'Banking/Financial Services',
                                     'location': 'Mullins, South Carolina, USA',
                                     'name': 'Anderson Bancshares, Inc.',
                                     'size': None,
                                     'type': 'Bank Holding Company'},
                                    {'customers_affected': None,
                                     'industry': 'Banking/Financial Services',
                                     'location': 'South Carolina, USA',
                                     'name': 'Anderson Brothers Bank',
                                     'size': None,
                                     'type': 'Community Bank'},
                                    {'customers_affected': None,
                                     'industry': 'Software/Technology',
                                     'location': None,
                                     'name': 'Marquis Software Solutions',
                                     'size': None,
                                     'type': 'Third-Party Vendor'}],
              'attack_vector': 'Third-Party Vendor Compromise',
              'customer_advisories': 'Written notice sent to affected '
                                     'individuals on Dec. 5, 2025',
              'data_breach': {'data_encryption': None,
                              'data_exfiltration': None,
                              'file_types_exposed': None,
                              'number_of_records_exposed': None,
                              'personally_identifiable_information': ['Names',
                                                                      'Dates '
                                                                      'of '
                                                                      'birth',
                                                                      'Social '
                                                                      'Security '
                                                                      'Numbers'],
                              'sensitivity_of_data': 'High',
                              'type_of_data_compromised': 'Personally '
                                                          'Identifiable '
                                                          'Information (PII)'},
              'date_detected': '2025-10',
              'date_publicly_disclosed': '2025-12-05',
              'description': 'Anderson Bancshares, Inc. experienced a data '
                             'breach through its third-party vendor, Marquis '
                             'Software Solutions. An unauthorized third party '
                             'gained access to personal information on Marquis '
                             'systems, impacting customer information stored '
                             'with the vendor.',
              'impact': {'brand_reputation_impact': None,
                         'conversion_rate_impact': None,
                         'customer_complaints': None,
                         'data_compromised': 'Sensitive personally '
                                             'identifiable information',
                         'downtime': None,
                         'financial_loss': None,
                         'identity_theft_risk': 'High',
                         'legal_liabilities': None,
                         'operational_impact': None,
                         'payment_information_risk': None,
                         'revenue_loss': None,
                         'systems_affected': 'Third-party vendor systems '
                                             '(Marquis Software Solutions)'},
              'initial_access_broker': {'backdoors_established': None,
                                        'data_sold_on_dark_web': None,
                                        'entry_point': None,
                                        'high_value_targets': None,
                                        'reconnaissance_period': None},
              'investigation_status': 'Ongoing',
              'post_incident_analysis': {'corrective_actions': None,
                                         'root_causes': 'Third-party vendor '
                                                        '(Marquis Software '
                                                        'Solutions) '
                                                        'compromise'},
              'ransomware': {'data_encryption': None,
                             'data_exfiltration': None,
                             'ransom_demanded': None,
                             'ransom_paid': None,
                             'ransomware_strain': None},
              'references': [{'date_accessed': None,
                              'source': 'Shamis & Gentile P.A.',
                              'url': None}],
              'regulatory_compliance': {'fines_imposed': None,
                                        'legal_actions': None,
                                        'regulations_violated': None,
                                        'regulatory_notifications': None},
              'response': {'adaptive_behavioral_waf': None,
                           'communication_strategy': 'Written notice sent to '
                                                     'affected individuals on '
                                                     'Dec. 5, 2025',
                           'containment_measures': None,
                           'enhanced_monitoring': None,
                           'incident_response_plan_activated': None,
                           'law_enforcement_notified': None,
                           'network_segmentation': None,
                           'on_demand_scrubbing_services': None,
                           'recovery_measures': None,
                           'remediation_measures': None,
                           'third_party_assistance': None},
              'title': 'Anderson Bancshares, Inc. Data Breach via Third-Party '
                       'Vendor',
              'type': 'Data Breach'}}
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