HackingManufacturingManufacturingData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDPIIMediumContained

CHEMICAL SERVICES GROUP, INC.

bd_9be016d931c5c304 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 3, 2026

Filed

Mar 30, 2026

To disclose

27 days

Affected

3state residents only

Linked

4 filings

Confidence

66%

Full breach record for CHEMICAL SERVICES GROUP, INC. →

Chemical Services Group (dba Royal Chemical) notified the NH AG that an unauthorized party accessed its internal network between April 11 and April 26, 2025. The breach potentially exposed names, driver's licenses, and SSNs of 3 NH residents. Royal Chemical engaged cybersecurity experts, contained the incident, and began notifying affected individuals on March 24, 2026, offering credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 326 days

discovery → filing · 27 days

Apr 11, 2025

Begins

Mar 3, 2026

Discovered

Mar 30, 2026

Filed

vs. sector median

7 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Texas State AGbd_7e47aeb8ad90fc082026-03-25 · +5dVerified by operator
Indiana State AGbd_73c263e1f4efee602026-03-24 · +6dCandidate
Massachusetts State AGbd_877aad6742eb74582026-03-24 · +6dVerified

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: CHEMICAL SERVICES GROUP, INC.
norm: chemical services
Also named: Chemical Services Group, Inc.dba oflegal entity
Royal Chemical Companydba oftrade name
Industry: Manufacturingllm

Discovered: Mar 3, 2026
Breach occurred: Apr 11, 2025 – Apr 26, 2025
Undetected for: 326 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 24, 2026
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government IDPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General's Consumer Protection Bureau
Initial access: exploit_public_facing

During the incident: Engaged leading cybersecurity experts to identify what personal information, if any, was involved
Conducted a thorough investigation
Performed extensive forensic investigation and manual document review
Provided the affected residents with notification of this incident
Offered complimentary one-year membership with a credit monitoring service upon request
Changes made: Continually evaluates and modifies its practices to enhance the security and privacy of the personal information it maintains
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 days(27 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Indiana State AGMar 24 · first

Massachusetts State AGMar 24 · first

Texas State AG+1d

New Hampshire State AG+6d · this page

Pattern: first filing Mar 24 (IN), last Mar 30 (NH) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/chemical-services-group-royal-chemical-20260330.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 30, 2026
Raw hash: 53412227eee959c5954231ecf9e01f5df3ee4b0f0bb60467c5e6517f19a87a49

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityMCDONALD HOPKINS LLC

Victim entityCHEMICAL SERVICES GROUP, INC.

Incidentdiscovered Mar 3, 2026

Stated responseEngaged leading cybersecurity experts to identify what personal information, if any, was involved

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov