MalwareProfessional ServicesProfessional ServicesRansomwareRansom DemandedData ExfiltratedPIIIdentity (basic)Government IDFinancial accountCredentialsMediumContained

Poulsen & Stowell, PLLC

bd_cbcf2ea5d1dc3c01 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 1, 2020

Filed

Aug 25, 2020

To disclose

12 weeks

Affected

2state residents only

Linked

4 filings

Confidence

66%

Full breach record for Poulsen & Stowell, PLLC →

Poulsen & Stowell, PLLC notified clients in August 2020 of a June 2020 data incident involving fraudulent tax filings. Malware was found on a corporate computer, potentially exposing client tax return information including SSNs and bank account numbers. The firm engaged forensic investigators, removed malware, reset passwords, and offered 12 months of credit monitoring.

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Incident timeline

discovery → filing · 12 weeks / 85 days

Jun 1, 2020

Discovered

Aug 25, 2020

Filed

vs. sector median

6 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

Indiana State AGbd_226e5b2435bdd11c2020-09-02 · +8dVerified
New Hampshire State AGbd_9f3b7ee5e8d76fbb2020-09-02 · +8dVerified
Massachusetts State AGbd_da295368317c15932020-09-09 · +15dVerified

Name: Poulsen & Stowell, PLLC
norm: poulsen stowell

Name: Poulsen & Stowell, PLLC
norm: poulsen stowell
Industry: Professional Servicesllm

Discovered: Jun 1, 2020
Materiality determined: —
Notification sent: Aug 25, 2020
Affected individuals: 2state-resident count only
Data types: PIIIdentity (basic)Government IDFinancial accountCredentials
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified the IRS of this incident
Initial access: valid_credentials

During the incident: Hired an independent computer forensic firm to investigate our network and systems
Removed the malicious software from the infected computer
Changed all passwords
Conducted additional anti-virus scanning on all systems
Notified the IRS of this incident
Changes made: Working with investigators to identify additional security measures to further enhance the security of our systems
Offering complimentary credit monitoring and identity protection services for 12 months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(85 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 ↗

Montana State AGAug 25 · first · this page

Indiana State AG+8d

New Hampshire State AG+8d

Massachusetts State AG+15d

Pattern: first filing Aug 25 (MT), last Sep 9 (MA) — a 15-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/ps-sample.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 25, 2020
Raw hash: 3ecc63fa570f816f5701a41df24e1b175ee2c3ec6ff6edbcbd34193c9a2d45ea

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityPoulsen & Stowell, PLLC

Victim entityPoulsen & Stowell, PLLC

Incidentdiscovered Jun 1, 2020

Stated responseHired an independent computer forensic firm to investigate our network and systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov