HackingTechnologyInformationStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDMediumContained

TaxSlayer

bd_40ae479f097ab3a4 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 13, 2016

Filed

Jan 29, 2016

To disclose

16 days

Affected

27state residents only

Linked

3 filings

Confidence

65%

Full breach record for TaxSlayer →

TaxSlayer notified Montana residents of unauthorized access to accounts between Oct 10 and Dec 21, 2015, discovered Jan 13, 2016. Attackers used stolen credentials from other services. Data accessed included names, addresses, and SSNs. TaxSlayer disabled access, required password resets and MFA, and offered credit monitoring.

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Incident timeline

undetected · 95 days

discovery → filing · 16 days

Oct 10, 2015

Begins

Jan 13, 2016

Discovered

Jan 29, 2016

Filed

vs. sector median

16 wks faster

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

California State AGbd_9f2d4f3a097040a12016-01-29Verified
Massachusetts State AGbd_b2c2b9a9308ffc582016-02-02 · +4dVerified

Name: TaxSlayer
norm: taxslayer

Name: TaxSlayer
norm: taxslayer
Industry: Technologyllm

Discovered: Jan 13, 2016
Breach occurred: Oct 10, 2015 – Dec 21, 2015
Undetected for: 95 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 27, 2016
Affected individuals: 27state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Temporarily disabled access
Offering free credit monitoring and restoration services through ID Experts
Changes made: Reset password via the “forgot password” utility
Authenticate yourself via multi-factor authentication
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 days(16 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 · 3 states

View merged incident ↗

California State AGJan 29 · first

Montana State AGJan 29 · first · this page

Massachusetts State AG+4d

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/TaxSlayer.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 29, 2016
Raw hash: 67cdc799707f84b85d1a5e10f77297e84ca5091382177e6ddea39d0dcb10c30d

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityTaxSlayer

Victim entityTaxSlayer

Incidentdiscovered Jan 13, 2016

Stated responseTemporarily disabled access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov