HackingFinancial ServicesFinanceVulnerability ExploitZero-DayData ExfiltratedCustomer Data InvolvedGovernment IDIdentity (basic)MediumContained

Crescent Bank

bd_255e1264a38fcb37 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 31, 2023

Filed

Sep 28, 2023

To disclose

17 weeks

Affected

251state residents only

Confidence

66%

Full breach record for Crescent Bank →

Financial Institution Service Corporation (FISC) notified New Hampshire residents that an unknown actor exploited zero-day vulnerabilities in the MOVEit Transfer server between May 30 and May 31, 2023, to exfiltrate data belonging to Crescent Bank members. Approximately 251 New Hampshire residents were affected. FISC reported the incident to federal law enforcement, provided credit monitoring via Kroll, and established a call center for affected individuals.

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Incident timeline

undetected · 1 days

discovery → filing · 17 weeks / 120 days

May 30, 2023

Begins

May 31, 2023

Discovered

Sep 28, 2023

Filed

vs. sector median

+9 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed251 affectedView incident

Name: Financial Institution Service Corporation
norm: financial institution service
Domain: fiscdp.com

Name: Crescent Bank
norm: crescent bank
Industry: Financial Servicesllm

Discovered: May 31, 2023
Breach occurred: May 30, 2023 – May 31, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Sep 22, 2023
Affected individuals: 251state-resident count only
Data types: Government IDIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: promptly reported the event to federal law enforcement and its primary federal regulators
Initial access: exploit_public_facing

During the incident: Moved quickly to investigate and respond
Assess the security of FISC’s systems, including its MOVEit Transfer server
Notify potentially affected member financial institutions
Promptly reported the event to federal law enforcement and its primary federal regulators
Providing access to credit monitoring services for 12 months, through Kroll
Established a toll-free call center for notified individuals
Changes made: Reviewing and enhancing our existing policies and procedures related to data privacy
Apply available patching and undertook recommended mitigation steps
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(120 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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://mm.nh.gov/files/uploads/doj/remote-docs/financial-institution-service-corporation-20230928.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 28, 2023
Raw hash: 47d56f3189894a2611296f3e61618cf0cc274e4c6a6284403267b0302524febc

Reporting entityFinancial Institution Service Corporation

Victim entityCrescent Bank

Incidentdiscovered May 31, 2023

Stated responseMoved quickly to investigate and respond

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov