MalwareOtherRansomwareCapture Stored DataData ExfiltratedData EncryptedIdentity (basic)Government IDPHIMediumContained

TEP Holdings LLC

bd_c057bceb02b2d728 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 15, 2021

Filed

Jun 28, 2021

To disclose

15 weeks

Affected

3state residents only

Linked

3 filings

Confidence

66%

Full breach record for TEP Holdings LLC →

TEP Holdings, LLC notified Montana regulators of a March 15, 2021 ransomware incident. The attack encrypted files and led to the exfiltration of personal information including names, SSNs, DOBs, and health insurance policy numbers. TEP contained the threat, restored data, and engaged forensic investigators. Affected individuals were offered one year of Experian IdentityWorks credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 15 weeks / 105 days

Mar 15, 2021

Discovered

Jun 28, 2021

Filed

vs. sector median

+7 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_229591a119f04c0e2021-07-01 · +3dVerified
Indiana State AGbd_61d9fb89837804f42021-06-25 · +3dVerified

Name: TEP Holdings LLC
norm: tep holdings

Name: TEP Holdings LLC
norm: tep holdings
Industry: Otherllm

Discovered: Mar 15, 2021
Materiality determined: —
Notification sent: —
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government IDPHI
Data elements: Social Security numberDate of birth
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial

During the incident: Contained the threat by disabling all unauthorized access to our network
Restored all encrypted data
Commenced a prompt and thorough investigation
Working very closely with external cybersecurity professionals
Offering a complimentary one-year membership of Experian IdentityWorksSM Credit 3B
Changes made: Continually evaluate and modify our practices to enhance the security and privacy of your information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(105 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 ↗

Indiana State AGJun 25 · first

Montana State AG+3d · this page

Massachusetts State AG+6d

Pattern: first filing Jun 25 (IN), last Jul 1 (MA) — 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://dojmt.gov/wp-content/uploads/OCP/a-notif-29.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 28, 2021
Raw hash: 020665bb296ec8f0a58297e24f900d04af6bef5d16acc7d0b9282f7a35d440d7

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityTEP Holdings LLC

Victim entityTEP Holdings LLC

Incidentdiscovered Mar 15, 2021

Stated responseContained the threat by disabling all unauthorized access to our network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov