HackingEducationEducationStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Substitute Teacher Service

bd_111021992bf6f556 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 9, 2025

Filed

Mar 12, 2025

To disclose

9 weeks

Affected

138state residents only

Linked

8 filings

Confidence

66%

Full breach record for Substitute Teacher Service →

Substitute Teacher Service, Inc. notified the Maryland AG that an unauthorized actor acquired database files containing names, SSNs, driver's license numbers, and financial account info from 138 Maryland residents. The incident was discovered on Jan 9, 2025, with unauthorized access occurring on Dec 22, 2024. Notifications were sent on March 3, 2025, offering 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Maryland clock⏱ MD AG >30d9 weeks discovery → filing

Incident timeline

undetected · 18 days

discovery → filing · 9 weeks / 62 days

Dec 22, 2024

Begins

Jan 9, 2025

Discovered

Mar 12, 2025

Filed

vs. sector median

+2 wks slower

This filing is one of 8 about the same incident.View merged incident

A leak claim by cicada3301 about this victim predates this filing by 32 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecicada3301bd_5c5d2147a4a876d82025-02-08 · +32dVerified by operator

Regulatory filings (6) · sorted by filing gap

Montana State AGbd_30de5097ad118e4d2025-03-12Candidate
New Hampshire State AGbd_96fd64d242721c772025-03-12Verified
Massachusetts State AGbd_1e246deb0cae191f2025-03-14 · +2dVerified by operator
Delaware State AGbd_05ca8d0db65cf27c2025-03-03 · +9dVerified by operator

Show 2 more filings ↓up to 29d gap

Indiana State AGbd_5e41e7fee095d80b2025-03-03 · +9dVerified by operator
Delaware State AGbd_126e3a2896b552682025-04-10 · +29dVerified by operator

Name: Substitute Teacher Service
norm: substitute teacher service
Domain: thesubservice.com

Name: Substitute Teacher Service
norm: substitute teacher service
Domain: thesubservice.com
Industry: Educationllm

Discovered: Jan 9, 2025
Breach occurred: Dec 22, 2024
Undetected for: 18 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 3, 2025
Affected individuals: 138state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated CollectionT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified Maryland Attorney General
Initial access: valid_credentials

During the incident: Retained outside experts and investigated the matter to determine the source and scope of the potential compromise
Implemented additional security measures to further harden their defenses
Sent notification letters to affected individuals
Established a toll-free call center through Epiq
Changes made: Implemented additional security measures to further harden their defenses
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(62 days from discovery to filing)
Compliance flags: MD AG >30dLeak >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 6 states

View merged incident ↗

Delaware State AGMar 3 · first

Indiana State AGMar 3 · first

Montana State AG+9d

New Hampshire State AG+9d

Maryland State AG+9d · this page

Massachusetts State AG+11d

Delaware State AG+38d

Pattern: first filing Mar 3 (DE), last Apr 10 (DE) — a 38-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://oag.maryland.gov/resources-info/SBN%20Documents/2025/ITU-376538.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 12, 2025
Raw hash: 28bcce162868db79057dac7843c3a5e90975696b254a0d48a5871e7d79382763

Linked disclosures

Ransomware claims (1)

Regulatory filings (6) · sorted by filing gap

Reporting entitySubstitute Teacher Service

Victim entitySubstitute Teacher Service

Incidentdiscovered Jan 9, 2025

Stated responseRetained outside experts and investigated the matter to determine the source and scope of the potential compromise

ComplianceMD AG >30d

Extraction provenanceno artifact recorded

Source provenanceoag.maryland.gov