MalwareEnergy & UtilitiesTechnologyUtilitiesRansomwareRansom DemandedData ExfiltratedData EncryptedTargetedIdentity (basic)Government IDFinancial accountMediumContained

EB Archbald & Associates, Inc.

bd_3958bbbaf620f66e · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 23, 2025

Filed

May 14, 2025

To disclose

7 weeks

Affected

117state residents only

Linked

8 filings

Confidence

66%

Full breach record for EB Archbald & Associates, Inc. →

EB Archbald & Associates, Inc. notified Montana residents of a ransomware attack discovered on March 23, 2025. Attackers encrypted servers and demanded ransom. Potential data exposure includes names, addresses, SSNs/TINs, and bank account/routing numbers. FBI was notified; ransom was refused. Forensic investigation and system upgrades (MFA, software updates) are underway.

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Incident timeline

undetected · 5 days

discovery → filing · 7 weeks / 52 days

Mar 18, 2025

Begins

Mar 23, 2025

Discovered

May 14, 2025

Filed

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

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Massachusetts State AGbd_132978a4b6696c132025-05-14Verified
Maine State AGbd_6521be5edc1246672025-05-14Verified
California State AGbd_ddaad36df642bd8a2025-05-13 · +1dVerified
Indiana State AGbd_196a79446ee9a3762025-05-20 · +6dVerified

Show 3 more filings ↓up to 23d gap

Delaware State AGbd_a9c188028cc5a8202025-05-20 · +6dVerified
Nebraska State AGbd_2ac0580cdb755adb2025-05-21 · +7dVerified
Texas State AGbd_6ac3bf8d232736102025-06-06 · +23dVerified

Name: EB Archbald & Associates, Inc.
norm: eb archbald associates

Name: EB Archbald & Associates, Inc.
norm: eb archbald associates
Industry: Energy & UtilitiesllmTechnologyllm

Discovered: Mar 23, 2025
Breach occurred: Mar 18, 2025 – Mar 23, 2025
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 117state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 ChannelT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Notified the Federal Bureau of Investigation
Initial access: exploit_public_facing

During the incident: Contacted the local office of the Federal Bureau of Investigation
Refused to meet the attackers’ extortion demands
Launched an investigation with the assistance of cybersecurity experts, law enforcement and outside lawyers
Partnered with IDX to answer questions and provide valuable information
Changes made: Upgrades to web server infrastructure to improve date security
Utilization of multi-factor authentication
Utilization of the very latest in cybersecurity software
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(52 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

California State AGMay 13 · first

Massachusetts State AG+1d

Maine State AG+1d

Montana State AG+1d · this page

Indiana State AG+7d

Delaware State AG+7d

Nebraska State AG+8d

Texas State AG+24d

Pattern: first filing May 13 (CA), last Jun 6 (TX) — a 24-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/2025/05/Consumer-notification-letter-4.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 14, 2025
Raw hash: 08e92096fa73e308070a379bf983ec96f093e318aea1216d33fbcab718c64422

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityEB Archbald & Associates, Inc.

Victim entityEB Archbald & Associates, Inc.

Incidentdiscovered Mar 23, 2025

Stated responseContacted the local office of the Federal Bureau of Investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov