MalwareProfessional ServicesProfessional ServicesRansomwareData EncryptedRansom DemandedIdentity (basic)Government IDFinancial accountFinancialMediumContained

Poulsen & Stowell, PLLC

bd_9f3b7ee5e8d76fbb · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 1, 2020

Filed

Sep 2, 2020

To disclose

13 weeks

Affected

4state residents only

Linked

4 filings

Confidence

67%

Full breach record for Poulsen & Stowell, PLLC →

Poulsen & Stowell, PLLC, a CPA firm, notified the NH AG on Sept 2, 2020, of a June 2020 incident where malware was found on a corporate computer, leading to fraudulent tax filings by clients. 4 NH residents affected. Data included names, SSNs, and bank info. Response included forensic investigation, malware removal, password resets, and 12 months credit monitoring.

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Incident timeline

discovery → filing · 13 weeks / 93 days

Jun 1, 2020

Discovered

Sep 2, 2020

Filed

vs. sector median

4 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_226e5b2435bdd11c2020-09-02Verified
Massachusetts State AGbd_da295368317c15932020-09-09 · +7dVerified
Montana State AGbd_cbcf2ea5d1dc3c012020-08-25 · +8dCandidate

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: Sep 2, 2020
Affected individuals: 4state-resident count only
Data types: Identity (basic)Government IDFinancial accountFinancial
Data elements: Social Security number
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Notified the IRS of this incident

During the incident: Engaged independent computer forensic experts to investigate its 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
Offered 12 months of credit monitoring and identity protection services through ID Experts
Changes made: Working with investigators to identify additional security measures to further enhance the security of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(93 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

Indiana State AG+8d

New Hampshire State AG+8d · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/poulsen-stowell-20200902.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 2, 2020
Raw hash: 73ca5c56fc822e2daad4952c9c36f601473d25ba0b15f7f155d16edaa4e370a1

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityPoulsen & Stowell, PLLC

Victim entityPoulsen & Stowell, PLLC

Incidentdiscovered Jun 1, 2020

Stated responseEngaged independent computer forensic experts to investigate its network and systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov