HackingOtherStolen CredentialsCapture Stored DataData ExfiltratedDelayed DiscoveryIdentity (basic)Government IDMediumContained

ESSEX PROPERTY TRUST, INC.

bd_1bbd733567704847 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 29, 2014

Filed

Apr 1, 2015

To disclose

26 weeks

Affected

1state residents only

Confidence

66%

Full breach record for ESSEX PROPERTY TRUST, INC. →4 incidents on file

Essex Property Trust, Inc. notified the NH AG of a cyber intrusion affecting systems holding personal info of 1 NH resident. Unauthorized access occurred Aug 2013–Sep 2014; detected Sep 2014. Data exfiltrated included names and SSNs. Notice sent March 2015. Credit monitoring offered.

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Incident timeline

undetected · 412 days

discovery → filing · 26 weeks / 184 days

Aug 13, 2013

Begins

Sep 29, 2014

Discovered

Apr 1, 2015

Filed

vs. sector median

+18 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: ESSEX PROPERTY TRUST, INC.
norm: essex property
Domain: essexproperty.com

Name: ESSEX PROPERTY TRUST, INC.
norm: essex property
Domain: essexproperty.com
Industry: Otherllm

Discovered: Sep 29, 2014
Breach occurred: Aug 13, 2013 – Sep 25, 2014
Undetected for: 412 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 19, 2015
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 ChannelT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Office of the Attorney General
Initial access: valid_credentials

During the incident: Took immediate steps to contain the intrusion and secure its systems
Retained independent forensic computer experts to analyze the impacted data systems
Consulted with law enforcement
Changes made: Provided notice and credit-monitoring services to its current residents and employees
Offering complimentary identity theft protection services from AllClear ID for 12 months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 weeks(184 days from discovery to filing)
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://mm.nh.gov/files/uploads/doj/remote-docs/essex-property-trust-20150401.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 1, 2015
Raw hash: 854d81dce1e2a23d27339cc309ce80ac3f695c11d50044fe63b0eb7c432a17fc

Reporting entityESSEX PROPERTY TRUST, INC.

Victim entityESSEX PROPERTY TRUST, INC.

Incidentdiscovered Sep 29, 2014

Stated responseTook immediate steps to contain the intrusion and secure its systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov