HackingStolen CredentialsCapture App DataData ExfiltratedEmployee Data InvolvedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDPHIHealth (basic)MediumContained

STEEL PARTNERS HOLDINGS L.P.

bd_d56f926d012676aa · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Nov 23, 2020

To disclose

—

Affected

Not disclosed

Confidence

78%

Full breach record for STEEL PARTNERS HOLDINGS L.P. →2 incidents on file

Steel Partners Holdings L.P. discovered unauthorized access to one employee email account. The incident occurred between April 18–29, 2020, with a determination of personal information involvement made on May 29, 2020. The mailbox was downloaded by the unauthorized actor. Affected data included names, SSNs, dates of birth, and health information related to disability or workers compensation claims. The letter was sent November 18, 2020.

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Incident timeline

Apr 18, 2020

Begins

Nov 23, 2020

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: STEEL PARTNERS HOLDINGS L.P.
norm: steel partners

Name: STEEL PARTNERS HOLDINGS L.P.
norm: steel partners

Discovered: —
Breach occurred: Apr 18, 2020 – Apr 29, 2020
Materiality determined: —
Notification sent: Nov 18, 2020
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDPHIHealth (basic)
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: valid_credentials

During the incident: Immediately initiated an investigation
Locked the compromised email account
Engaged a forensic security firm to assist
Conducted a broader review of systems to confirm only one email account was impacted
Required a password reset for employees
Offering complimentary two-year subscription to Experian IdentityWorks credit monitoring and identity theft protection service
Changes made: Implemented changes to login process
Implemented stricter multi-factor authentication rules
Continuing to work with the forensic security firm to further strengthen existing security measures
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/sb24-196400
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 23, 2020
Raw hash: c0e71ddc9d5fb178f66dde9bec6dab099d1172116ac57f905f7ebb1db603d8c9

Reporting entitySTEEL PARTNERS HOLDINGS L.P.

Victim entitySTEEL PARTNERS HOLDINGS L.P.

IncidentUnauthorized Access

Stated responseImmediately initiated an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov