HackingProfessional ServicesProfessional ServicesStolen CredentialsTargetedPIIIdentity (basic)LowContained

Overseas Service Corporation

bd_e8cf1be8f85a61ca · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 3, 2020

Filed

Mar 10, 2021

To disclose

18 weeks

Affected

1state residents only

Linked

3 filings

Confidence

66%

Full breach record for Overseas Service Corporation →

Overseas Service Corporation notified Montana residents of unauthorized access to employee email accounts between Jan 4 and July 1, 2020. The incident involved the potential viewing of personal information. OSC secured accounts, engaged forensic investigators, and provided one year of Kroll identity monitoring services.

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Incident timeline

undetected · 304 days

discovery → filing · 18 weeks / 127 days

Jan 4, 2020

Begins

Nov 3, 2020

Discovered

Mar 10, 2021

Filed

vs. sector median

1 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_e03a3105c28771772021-03-10Verified
New Hampshire State AGbd_6f30495d3d01111a2021-03-11 · +1dVerified

Name: Overseas Service Corporation
norm: overseas service

Name: Overseas Service Corporation
norm: overseas service
Industry: Professional Servicesllm

Discovered: Nov 3, 2020
Breach occurred: Jan 4, 2020 – Jul 1, 2020
Undetected for: 304 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: valid_credentials

During the incident: Secured the employees’ email accounts
Engaged a cybersecurity forensics firm
Searched the contents of the accounts to identify documents containing personal information
Provided identity monitoring services through Kroll for one year
Changes made: Enhancing existing security protocols
Re-educating staff for awareness on these types of incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(127 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 AGMar 10 · first

Montana State AGMar 10 · first · this page

New Hampshire State AG+1d

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/oscSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 10, 2021
Raw hash: ae4c67989a02c63e8f4eaf201a87222b22e191af308d8b8a63ab96cd0be514f2

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityOverseas Service Corporation

Victim entityOverseas Service Corporation

Incidentdiscovered Nov 3, 2020

Stated responseSecured the employees’ email accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov