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 filings

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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Incident timeline

discovery → filing · 5 weeks / 35 days

Oct 28, 2024

Discovered

Dec 2, 2024

Filed

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

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: — (clock not assessable for this source)

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov