MalwareTransportation & LogisticsTransportationRansomwareData ExfiltratedData EncryptedPIIIdentity (basic)LowContained

ATC Transportation

bd_8931f834dbba6b89 · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 22, 2021

Filed

May 7, 2021

To disclose

7 weeks

Affected

22state residents only

Linked

7 filings

Confidence

65%

ATC Transportation, a subsidiary of JHT Holdings, Inc., disclosed a ransomware attack discovered on March 22, 2021. Unauthorized actors accessed systems between March 4 and March 22, encrypting servers and potentially exfiltrating personal information including names. The company engaged forensic investigators, notified federal law enforcement, and provided one year of credit monitoring to affected individuals.

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Incident timeline

undetected · 18 days

discovery → filing · 7 weeks / 46 days

Mar 4, 2021

Begins

Mar 22, 2021

Discovered

May 7, 2021

Filed

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

New Hampshire State AGbd_235dfa7b2b169d612021-05-07Verified
Washington State AGbd_7b3cc16f5357fae02021-05-07Verified
Indiana State AGbd_93d4b4466a9a480e2021-05-07Verified
Maine State AGbd_b591316a7a98c05b2021-05-07Candidate

Show 2 more filings ↓

Oregon State AGbd_e535fd8ef86341f82021-05-07Verified
Massachusetts State AGbd_fdb623f4b9e242e32021-05-07Verified

Name: JHT Holdings, Inc.
norm: jht holdings

Name: ATC Transportation
norm: atc transportation
Also named: JHT Holdings, Inc.operating subsidiary ofholding company
Industry: Transportation & Logisticsllm

Discovered: Mar 22, 2021
Breach occurred: Mar 4, 2021 – Mar 22, 2021
Undetected for: 18 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 15, 2021
Affected individuals: 22state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Federal law enforcement was notified

During the incident: Took steps to secure our systems
Launched an investigation
Engaged a leading cybersecurity firm to assist
Federal law enforcement was notified
Changes made: Implemented additional security measures designed to enhance the security of our network, systems, and data
Arranged for you to enroll, at no cost to you, in online, three-bureau credit monitoring service (myTrueIdentity) for one year
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(46 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

New Hampshire State AGMay 7 · first

Washington State AGMay 7 · first

Indiana State AGMay 7 · first

Maine State AGMay 7 · first

Oregon State AGMay 7 · first

Massachusetts State AGMay 7 · first

Montana State AGMay 7 · 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/JHG-Notif.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 7, 2021
Raw hash: c52964799b1ba74f41b790149b831afd23dbb809a9a863fcddb57d34b8a73ba0

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityJHT Holdings, Inc.

Victim entityATC Transportation

Incidentdiscovered Mar 22, 2021

Stated responseTook steps to secure our systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov