HackingTransportation & LogisticsTransportationStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Overseas Shipholding Group, Inc.

bd_6a3b10a50aac2654 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 28, 2024

Filed

Dec 2, 2024

To disclose

5 weeks

Affected

13state residents only

Linked

9 records

Confidence

66%

Full breach record for Overseas Shipholding Group, Inc. →

Overseas Shipholding Group, Inc. notified Montana residents of a data breach where an unauthorized actor accessed systems containing names, SSNs, passport numbers, and merchant mariner credentials. The company secured systems, investigated, and offered one year of credit monitoring.

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Leak gap clock⏱ Leak >90d5 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 5 weeks / 35 days

Oct 28, 2024

Discovered

Dec 2, 2024

Filed

This filing is one of 9 records about the same incident.View merged incident

A leak claim by ransomhub about this victim was first seen 105 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteransomhubbd_a666c19b8e023ed12024-08-19 · +104dVerified by operator

Regulatory filings (7) · sorted by filing gap

Maine State AGbd_0e1d268849e71eef2024-12-02Verified by operator
Vermont State AGbd_4572f9d6af857ada2024-12-02Verified by operator
Massachusetts State AGbd_517c65309ffc4f472024-12-02Verified by operator
California State AGbd_700f147321d34c862024-12-02Verified by operator

Show 3 more filings ↓

Washington State AGbd_ab04de904f82bc8a2024-12-02Verified by operator
Indiana State AGbd_c0ea9d11d663ec592024-12-02Verified by operator
New Hampshire State AGbd_f56f78da8d95bfa42024-12-02Verified by operator

Name: Overseas Shipholding Group, Inc.
norm: overseas shipholding
Domain: osg.com

Name: Overseas Shipholding Group, Inc.
norm: overseas shipholding
Domain: osg.com
Industry: Transportation & Logisticsllm

Discovered: Oct 28, 2024
Materiality determined: —
Notification sent: —
Affected individuals: 13state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Secured the involved systems
Launched an investigation
Arranged for complimentary one-year membership to credit monitoring services
Implemented additional security measures to enhance the security of our network
Changes made: Implemented additional security measures to enhance the security of our network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(35 days from discovery to filing)
Compliance flags: Leak >90d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

Maine State AGDec 2 · first

Vermont State AGDec 2 · first

Massachusetts State AGDec 2 · first

California State AGDec 2 · first

Washington State AGDec 2 · first

Indiana State AGDec 2 · first

New Hampshire State AGDec 2 · first

Montana State AGDec 2 · first · this page

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/2025/03/Consumer-notification-letter-2.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 2, 2024
Raw hash: 897031586be341ce8d6dc9c75ca7919334638057a3581eb948cf0492f269829e

Linked disclosures

Ransomware claims (1)

Regulatory filings (7) · sorted by filing gap

Reporting entityOverseas Shipholding Group, Inc.

Victim entityOverseas Shipholding Group, Inc.

Incidentdiscovered Oct 28, 2024

Stated responseSecured the involved systems

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancedojmt.gov