HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDFinancialMediumContained

ADP

bd_0b42389df0393bfa · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 10, 2020

Filed

Feb 19, 2020

To disclose

9 days

Affected

2state residents only

Linked

5 filings

Confidence

66%

ADP disclosed that between Jan 24 and Feb 11, 2020, an unauthorized user accessed self-service accounts using valid credentials, potentially downloading 2019 tax info. ADP discovered the incident on Feb 10, 2020. Affected data includes names, addresses, wages, and SSNs. ADP offered 12 months of Experian IdentityWorks and notified the IRS.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 17 days

discovery → filing · 9 days

Jan 24, 2020

Begins

Feb 10, 2020

Discovered

Feb 19, 2020

Filed

vs. sector median

16 wks faster

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Massachusetts State AGbd_e7c4f084936463942020-02-19Verified
South Carolina State AGbd_f858bde2a26681382020-02-20 · +1dVerified
Indiana State AGbd_88d532d4c7eba3642020-02-18 · +1dVerified
New Hampshire State AGbd_507576f884070fb12020-02-21 · +2dVerified

Name: ADP
norm: adp
Domain: adp.com

Name: ADP
norm: adp
Domain: adp.com
Industry: Professional Servicesllm

Discovered: Feb 10, 2020
Breach occurred: Jan 24, 2020 – Feb 11, 2020
Undetected for: 17 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government IDFinancial
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Reported the incident to the Internal Revenue Service (IRS)
Initial access: valid_credentials

During the incident: Offering complimentary 12-month membership of Experian IdentityWorks identity theft protection
Reported the incident to the Internal Revenue Service (IRS)
Changes made: Taking steps to protect affected individuals
Updating security controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 days(9 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Indiana State AGFeb 18 · first

Massachusetts State AG+1d

Montana State AG+1d · this page

South Carolina State AG+2d

New Hampshire State AG+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://dojmt.gov/wp-content/uploads/OCP/Breach-NotificationDetails-119.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 19, 2020
Raw hash: 5e765138cf58dc2ee657cded5d58e94d41a61aa7e35406266cefde7120b1ed96

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityADP

Victim entityADP

Incidentdiscovered Feb 10, 2020

Stated responseOffering complimentary 12-month membership of Experian IdentityWorks identity theft protection

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov