SitusAMC, a financial service provider handling billions of loan-related documents annually for over 1,500 commercial and residential real-estate financiers, suffered a data breach on **12th November**. Hackers infiltrated its systems and stole **corporate data tied to banking customers' relationships**, including **accounting records and legal agreements**. Major US banks like **JPMorgan Chase, Citigroup, and Morgan Stanley** were notified of potential exposure, though the full scope of compromised data remains under investigation. The breach was **not a ransomware attack**, as no encrypting malware was detected—indicating a focused effort on **data exfiltration** rather than system disruption. SitusAMC contained the incident, reset credentials, disabled remote access tools, and cooperated with law enforcement (including the FBI). The breach highlights vulnerabilities in **third-party vendor dependencies**, risking cascading exposure across financial institutions. While no operational impact on banking services was reported, the stolen data could include **sensitive non-public information** from lenders, investors, and mortgage servicers, posing reputational and financial risks to affected clients.
SitusAMC cybersecurity rating report: https://www.rankiteo.com/company/situsamc
"id": "SIT1640716112525",
"linkid": "situsamc",
"type": "Breach",
"date": "11/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'industry': 'Financial Services / Real Estate '
'Financing',
'location': 'New York, USA',
'name': 'SitusAMC',
'size': '$1 billion annual revenue; serves 1,500+ '
'commercial/residential real-estate financiers',
'type': 'Financial Technology Provider'},
{'industry': 'Financial Services',
'location': 'USA',
'name': 'JPMorgan Chase',
'type': 'Bank'},
{'industry': 'Financial Services',
'location': 'USA',
'name': 'Citigroup (Citi)',
'type': 'Bank'},
{'industry': 'Financial Services',
'location': 'USA',
'name': 'Morgan Stanley',
'type': 'Bank'},
{'industry': 'Public Sector / Finance',
'location': 'USA',
'name': 'Unnamed pension funds and state governments',
'type': 'Government/Institutional'}],
'data_breach': {'data_exfiltration': True,
'sensitivity_of_data': 'High (non-public financial '
'information)',
'type_of_data_compromised': ['Corporate data (banking '
'customer relationships)',
'Accounting records',
'Legal agreements']},
'date_detected': '2023-11-12',
'date_publicly_disclosed': '2023-11-18',
'description': 'Financial service provider SitusAMC confirmed a data breach '
'on 12th November 2023, potentially exposing sensitive '
'corporate data tied to its banking customers, including '
'JPMorgan Chase, Citigroup, and Morgan Stanley. The attackers '
'stole accounting records and legal agreements, but no '
'encrypting malware was found, indicating a focus on data '
'exfiltration rather than ransomware. The breach highlights '
'risks in third-party vendor dependencies within the financial '
'sector.',
'impact': {'brand_reputation_impact': 'Potential reputational harm to '
'SitusAMC and affected banks (JPMorgan, '
'Citi, Morgan Stanley)',
'data_compromised': ["Corporate data tied to banking customers' "
'relationships',
'Accounting records',
'Legal agreements'],
'identity_theft_risk': 'High (sensitive financial data exposed)',
'operational_impact': 'None reported (systems fully operational)'},
'initial_access_broker': {'high_value_targets': ['Banking customer '
'relationships data',
'Accounting records',
'Legal agreements']},
'investigation_status': 'Ongoing (scope and nature under investigation)',
'lessons_learned': ['Third-party vendor risks can cascade across financial '
'sector partners.',
'Continuous validation of IT environments and supply '
'chain security is critical.',
'Assumptions about security controls must be verified, '
'not taken for granted.',
'Resilience requires collective responsibility across '
'interconnected systems.'],
'motivation': 'Data Theft / Espionage (presumed)',
'post_incident_analysis': {'corrective_actions': ['Credential resets',
'Disabled remote access '
'tools',
'Updated firewall rules',
'Strengthened security '
'settings']},
'ransomware': {'data_exfiltration': True},
'recommendations': ['Enforce multi-factor authentication (MFA) and single '
'sign-on (SSO) across all systems.',
'Regularly evaluate security posture of partners/vendors '
'with strong fundamentals.',
'Maintain procedures to prevent breaches from spreading '
'through vendor networks.',
'Implement continuous validation of IT controls and '
'response readiness.'],
'references': [{'source': 'CNN'},
{'source': 'Bloomberg'},
{'source': 'The New York Times'},
{'date_accessed': '2023-11-18',
'source': 'SitusAMC Public Statement'},
{'source': 'FBI Statement (Kash Patel)'},
{'source': 'TPO Group (Munish Walther-Puri)'},
{'source': 'ThreatAware (Jon Abbott)'}],
'regulatory_compliance': {'regulatory_notifications': ['FBI notified and '
'involved in '
'investigation']},
'response': {'communication_strategy': ['Public statement',
'Breach notifications to affected '
'institutions (JPMorgan, Citi, Morgan '
'Stanley)'],
'containment_measures': ['Credential resets',
'Disabled remote access tools',
'Updated firewall rules',
'Strengthened security settings'],
'incident_response_plan_activated': True,
'law_enforcement_notified': True,
'third_party_assistance': True},
'stakeholder_advisories': ['Breach notifications sent to JPMorgan Chase, '
'Citi, and Morgan Stanley'],
'title': 'SitusAMC Data Breach Exposes JPMorgan, Citi, and Morgan Stanley '
'Customer Data',
'type': 'Data Breach'}