HackingFinancial ServicesTechnologyFinanceVulnerability ExploitCapture Stored DataZero-DayData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Financial Institution Service Corporation

bd_f0522e8399768dcd · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 31, 2023

Filed

Sep 22, 2023

To disclose

16 weeks

Affected

272state residents only

Linked

4 filings

Confidence

65%

Full breach record for Financial Institution Service Corporation →10 incidents on file

Financial Institution Service Corporation (FISC) notified Montana residents of a data breach involving the MOVEit Transfer tool. An unknown actor exploited zero-day vulnerabilities to access the server between May 30-31, 2023, exfiltrating names, SSNs, driver's licenses, and financial account data. FISC engaged forensic specialists, reported to law enforcement, and provided 12 months of Kroll identity monitoring.

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Incident timeline

undetected · 1 days

discovery → filing · 16 weeks / 114 days

May 30, 2023

Begins

May 31, 2023

Discovered

Sep 22, 2023

Filed

vs. sector median

+8 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecl0pbd_868874c89834e55b2023-07-07 · +77dVerified by operator

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_ee6604ed129e9a642023-09-22Verified
South Carolina State AGbd_6c9e179c96a550ba2023-09-29 · +7dVerified by operator

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

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

Discovered: May 31, 2023
Breach occurred: May 30, 2023 – May 31, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 272state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 ChannelT1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: promptly reported the event to federal law enforcement
Initial access: exploit_public_facing

During the incident: Moved quickly to apply available patching and undertook recommended mitigation steps
Launched an investigation, with the assistance of third-party cybersecurity specialists
Promptly reported the event to federal law enforcement
Providing you with access to twelve (12) months of identity monitoring services provided by Kroll
Changes made: Reviewing and enhancing our existing policies and procedures related to data privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(114 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 AGSep 22 · first

Montana State AGSep 22 · first · this page

South Carolina State AG+7d

Pattern: first filing Sep 22 (MA), last Sep 29 (SC) — a 7-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-710.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 22, 2023
Raw hash: b2cd2a6b54a6fc4f69e9dff09d1406f1bb297e1951eefa8bf91eb150da2acfb6

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityFinancial Institution Service Corporation

Victim entityFinancial Institution Service Corporation

Incidentdiscovered May 31, 2023

Stated responseMoved quickly to apply available patching and undertook recommended mitigation steps

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov