HackingHealthcareTechnologyHealthcareStolen CredentialsCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDFinancial accountMediumContained

GUARDANT HEALTH, INC.

bd_060849c244e32601 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 23, 2018

Filed

Oct 25, 2018

To disclose

9 weeks

Affected

1state residents only

Linked

2 filings

Confidence

66%

Full breach record for GUARDANT HEALTH, INC. →4 incidents on file

Guardant Health, Inc. notified the NH Attorney General of unauthorized access to shared email accounts occurring between Feb 24 and Aug 14, 2018. Discovered Aug 23, 2018. One NH resident affected. Data included names, SSNs, DOBs, and bank info. Response included forensic investigation, firewall updates, password resets, and 24 months of credit monitoring.

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Incident timeline

undetected · 180 days

discovery → filing · 9 weeks / 63 days

Feb 24, 2018

Begins

Aug 23, 2018

Discovered

Oct 25, 2018

Filed

vs. sector median

3 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_f78ca01896863e902018-10-25Verified

Name: GUARDANT HEALTH, INC.
norm: guardant health
Domain: guardanthealth.com

Name: GUARDANT HEALTH, INC.
norm: guardant health
Domain: guardanthealth.com
Industry: HealthcarellmTechnologyllm

Discovered: Aug 23, 2018
Breach occurred: Feb 24, 2018 – Aug 14, 2018
Undetected for: 180 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 24, 2018
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Notified NH Department of Justice pursuant to N.H. Rev. Stat. § 359-C:20
Initial access: valid_credentials

During the incident: Took immediate steps to stop the unauthorized access to email accounts
Began an investigation with a leading cyber forensics firm
Improved our firewall to block intruder attempts
Updated employee passwords to be more complex
Trained our employees on security awareness
Offered 24 months of complimentary credit monitoring and identity protection through AllClear ID
Changes made: Improved firewall to block intruder attempts
Updated employee passwords to be more complex
Trained employees on security awareness
Implementing additional measures to strengthen the security of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(63 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGOct 25 · first

New Hampshire State AGOct 25 · first · this page

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/guardant-20181025.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 25, 2018
Raw hash: e7928ac7cc5eac76171db264da3e6e1b0835a1471f35c2880c5777b2d80312ae

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityGUARDANT HEALTH, INC.

Victim entityGUARDANT HEALTH, INC.

Incidentdiscovered Aug 23, 2018

Stated responseTook immediate steps to stop the unauthorized access to email accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov