FEDERALItem 1.05 · mandatoryHackingTechnologyInformationComputer HardwareMidnight Blizzard (Cozy Bear)Data ExfiltratedActor NamedNation State SuspectedTargetedEmployee Data InvolvedDelayed DiscoveryMulti-Stage ChainLowContained

HEWLETT PACKARD ENTERPRISE COMPANY

bd_cdd41d4da6447050 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 12, 2023

Filed

Jan 24, 2024

To disclose

6 weeks

Affected

Not disclosed

Confidence

87%

Full breach record for HEWLETT PACKARD ENTERPRISE COMPANY →2 incidents on file

HPE disclosed an Item 1.05 material cybersecurity incident: on December 12, 2023, HPE was notified that suspected nation-state actor Midnight Blizzard (Cozy Bear) gained unauthorized access to its cloud-based email environment, exfiltrating data from a small percentage of mailboxes beginning May 2023. The incident is believed related to a separately-noticed June 2023 SharePoint exfiltration. HPE engaged external experts, contained and eradicated the activity, and notified law enforcement. No material impact determined as of filing.

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SEC clockMateriality determined Jan 19, 2024 → Filed Jan 24, 20245d ✓ SEC 4-day OK6 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 225 days

discovery → filing · 6 weeks / 43 days

May 1, 2023

Begins

Dec 12, 2023

Discovered

Jan 19, 2024

Scope determined

Jan 24, 2024

Filed

vs. sector median

5 wks faster

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

Name: HEWLETT PACKARD ENTERPRISE COMPANY
norm: hewlett packard enterprise
SEC CIK: 0001645590
Domain: hpe.com

Name: HEWLETT PACKARD ENTERPRISE COMPANY
norm: hewlett packard enterprise
SEC CIK: 0001645590
Domain: hpe.com
Industry: Technologyllm
NAICS 334118 · Computer Terminal and Other Computer Peripheral Equipment Manufacturing

Discovered: Dec 12, 2023
Breach occurred: May 1, 2023
Undetected for: 225 daysoccurrence → discovery
Materiality determined: Jan 19, 2024
Notification sent: —
Affected individuals: Not disclosed
Data types: —
Attack vector: Unauthorized Access· Midnight Blizzard (Cozy Bear)
MITRE ATT&CK: T1078.004 Cloud AccountsT1114 Email CollectionT1041 Exfiltration Over C2 Channel
Threat actor: Midnight Blizzard (Cozy Bear)ExternalEspionage
Regulator citations: Notified and cooperating with law enforcementAssessing regulatory notification obligations

During the incident: Activated our response process to investigate, contain, and remediate the incident
Engaged external cybersecurity experts
Eradicated the threat actor activity
Notified and are cooperating with law enforcement
Changes made: Took containment and remediation measures intended to eradicate the activity
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(43 days from discovery to filing)
Compliance flags: SEC 4-day OK · 5d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
SEC
Materiality determined: Jan 19, 2024
→ Filed: Jan 24, 2024
5d cal. 4 business days SEC 4-day OK

Statute	Window	Elapsed	Threshold	Status
SEC	Materiality determined: Jan 19, 2024 → Filed: Jan 24, 2024	5d cal.	4 business days	SEC 4-day OK

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 filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/1645590/000164559024000009/hpe-20240119.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Jan 24, 2024
Raw hash: 95d6bb40548991ac32b6de2f4eba9b0adf1e0bbe2526cff7ebf1708e6787eb45

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Reporting entityHEWLETT PACKARD ENTERPRISE COMPANY

Victim entityHEWLETT PACKARD ENTERPRISE COMPANY

Incidentdiscovered Dec 12, 2023

Stated responseActivated our response process to investigate, contain, and remediate the incident

ComplianceSEC 4-day OK

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing