MalwareProfessional ServicesProfessional ServicesRansomwareData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDMediumContained

Bansley and Kiener, LLP

bd_d8742baa54ae80c0 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 10, 2020

Filed

Nov 30, 2021

To disclose

51 weeks

Affected

Not disclosed

Linked

6 filings

Confidence

65%

Full breach record for Bansley and Kiener, LLP →3 incidents on file

Bansley and Kiener, L.L.P., an accounting firm, experienced a ransomware incident resulting in system encryption in December 2020. In May 2021, the firm discovered that data had been exfiltrated. The investigation confirmed that full names and Social Security numbers of clients were accessed. The firm engaged a cybersecurity firm, restored systems, deployed EDR, and offered one year of identity monitoring via Kroll.

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Incident timeline

undetected · 112 days

discovery → filing · 51 weeks / 355 days

Aug 20, 2020

Begins

Dec 10, 2020

Discovered

Nov 30, 2021

Filed

vs. sector median

+33 wks slower

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Montana State AGbd_77b244465609bf862021-11-30Verified by operator
New Hampshire State AGbd_911585320be84e192021-11-30Verified by operator
HHS OCRbd_4bae8a61184e543c2021-12-03 · +3dVerified
HHS OCRbd_604e6a41f2e4e9722021-12-03 · +3dCandidate

Show 1 more filing ↓up to 3d gap

HHS OCRbd_cda0a2da4eccbe3a2021-12-03 · +3dVerified by operator

Name: Bansley and Kiener, LLP
norm: bansley and kiener
Domain: bk-cpa.com

Name: Bansley and Kiener, LLP
norm: bansley and kiener
Domain: bk-cpa.com
Industry: Professional Servicesllm

Discovered: Dec 10, 2020
Breach occurred: Aug 20, 2020 – Dec 1, 2020
Undetected for: 112 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: External

During the incident: Addressed the incident
Made upgrades to certain aspects of our computer security
Restored the impacted systems from recent backups
Resumed normal operation
Launched an investigation
Engaged a cyber security firm to assist
Deployed SentinelOne Endpoint Detection & Response software on the computers in our environment
Upgraded our filtering capabilities to block traffic from malicious sources
Establishing and reviewing permissions for secure file share portals
Resetting user passwords
Transferring sensitive data to cloud storage
Educate our employees on cyber security best practices
Secured the services of Kroll to provide identity monitoring services at no cost to you for one (1) year
Changes made: Deployed SentinelOne Endpoint Detection & Response software on the computers in our environment
Upgraded our filtering capabilities to block traffic from malicious sources
Establishing and reviewing permissions for secure file share portals
Resetting user passwords
Transferring sensitive data to cloud storage
Educate our employees on cyber security best practices
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 51 weeks(355 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 4 states

View merged incident ↗

Montana State AGNov 30 · first

New Hampshire State AGNov 30 · first

California State AGNov 30 · first · this page

HHS OCR+3d

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://oag.ca.gov/ecrime/databreach/reports/sb24-548063
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 30, 2021
Raw hash: a8089e96014f8dc18594afd532e181ec8d692af5eee779cf4efb8666e0ae0504

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityBansley and Kiener, LLP

Victim entityBansley and Kiener, LLP

Incidentdiscovered Dec 10, 2020

Stated responseAddressed the incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov