HackingProfessional ServicesProfessional ServicesDelayed DiscoveryIdentity (basic)Government IDFinancial accountMediumContained

Donlen Corporation

bd_035cf9fbb49a2e07 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 4, 2021

Filed

Sep 8, 2022

To disclose

18 months

Affected

19state residents only

Linked

3 filings

Confidence

66%

Full breach record for Donlen Corporation →3 incidents on file

Donlen Corporation (aka Sellerco Corporation) notified the NH AG of unauthorized network access between Feb 24 and Mar 4, 2021. Discovered Mar 4, 2021. 19 NH residents affected. Data included names, SSNs, and financial account info. Response included law enforcement notification and 12 months credit monitoring.

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Incident timeline

undetected · 8 days

discovery → filing · 18 months / 553 days

Feb 24, 2021

Begins

Mar 4, 2021

Discovered

Sep 8, 2022

Filed

vs. sector median

+60 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

New Hampshire State AGbd_d11b738c5bfd04ee2022-10-07 · +29dVerified
Montana State AGbd_087f420172088bed2022-10-28 · +50dVerified

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Donlen Corporation
norm: donlen
Domain: donlen.com
Industry: Professional Servicesllm

Discovered: Mar 4, 2021
Breach occurred: Feb 24, 2021 – Mar 4, 2021
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 29, 2022
Affected individuals: 19state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified Federal law enforcementProviding written notice of this event to relevant state regulatorsProviding notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion

During the incident: Moved quickly to investigate and respond to the event
Assessed the security of Donlen Corporation systems
Identified potentially affected individuals
Notified Federal law enforcement regarding the event
Resetting relevant account passwords
Reviewing the contents of the impacted systems
Reviewing internal systems to identify contact information
Changes made: Providing access to credit monitoring services for twelve (12) months through IDX
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing information on how to place a fraud alert and a credit freeze on their credit files
Providing information on how to obtain a free credit report
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 months(553 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 · 2 states

View merged incident ↗

New Hampshire State AGSep 8 · first · this page

New Hampshire State AG+29d

Montana State AG+50d

Pattern: first filing Sep 8 (NH), last Oct 28 (MT) — a 50-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/donlen-aka-sellerco-20220908.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 8, 2022
Raw hash: 7f69dde6bc122aeb7e8ac2da7c7b9a90ae1f3e298665b04ac5729e50ac153d28

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityDonlen Corporation

Incidentdiscovered Mar 4, 2021

Stated responseMoved quickly to investigate and respond to the event

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov