HackingProfessional ServicesProfessional ServicesStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Thomas Chandler Thomas & Hinshaw, LLP

bd_b943d64951c8a4b2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 21, 2018

Filed

Jun 22, 2018

To disclose

17 weeks

Affected

3state residents only

Linked

3 filings

Confidence

65%

Full breach record for Thomas Chandler Thomas & Hinshaw, LLP →

Thomas Chandler Thomas & Hinshaw, LLP notified the NH Attorney General that an unauthorized user accessed its computer system between Feb 15-21, 2018. 3 NH residents affected; data included names, SSNs, and potentially bank account numbers. Notification sent June 22, 2018, with credit monitoring offered.

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Incident timeline

undetected · 6 days

discovery → filing · 17 weeks / 121 days

Feb 15, 2018

Begins

Feb 21, 2018

Discovered

Jun 22, 2018

Filed

vs. sector median

2 wks faster

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

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_68fe77ec99319e122018-06-25 · +3dVerified
South Carolina State AGbd_9eff95f2bb5f5f032018-06-26 · +4dCandidate

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: Thomas Chandler Thomas & Hinshaw, LLP
norm: thomas chandler thomas hinshaw
Domain: tcthllp.com
Industry: Professional Servicesllm

Discovered: Feb 21, 2018
Breach occurred: Feb 15, 2018 – Feb 21, 2018
Undetected for: 6 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 22, 2018
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified Attorney General Joseph Foster, Office of the Attorney General, Concord, NH
Initial access: valid_credentials

During the incident: Commenced a prompt and thorough investigation
Took steps to mitigate any risk to its clients' personal information
Worked very closely with external cybersecurity professionals experienced in handling these types of incidents
Provided the New Hampshire residents with written notice of this incident commencing on June 22, 2018
Offering the residents a complimentary membership with a credit monitoring and identity theft protection service
Changes made: Continually evaluates and modifies its practices and internal controls to enhance the security and privacy of personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(121 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 ↗

New Hampshire State AGJun 22 · first · this page

Massachusetts State AG+3d

South Carolina State AG+4d

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://mm.nh.gov/files/uploads/doj/remote-docs/thomas-chandler-20180622.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 22, 2018
Raw hash: a545612c3bacb7ea3683790a822e627b5ada3c7f6d6ed85f78d17242f7071260

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMCDONALD HOPKINS LLC

Victim entityThomas Chandler Thomas & Hinshaw, LLP

Incidentdiscovered Feb 21, 2018

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov