Cyber Threat Intelligence
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Ransomware Victim Public Sector

cityofpleasantonca.gov

Ransomware attack by Valencialeaks · Disclosed September 10, 2024 · 🇺🇸 United States

cityofpleasantonca.gov

Date Disclosed
Sep 10, 2024
2024
Threat Group
Valencialeaks
5 total victims
Country
🇺🇸 United States
Industry
Public Sector

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Valencialeaks. Figures and technique mappings are quoted from the source data, not inferred.

About the Valencialeaks group

ValenciaLeaks is a data-extortion group that surfaced in August–September 2024, focused on exfiltrating large volumes of data and publishing it on a dedicated leak site, with documented victims including the City of Pleasanton, CA (283 GB exfiltrated) and pharmaceutical firm Duo Pharma Biotech. Valencialeaks has listed 5 victims since September 2024.

Incident Analysis

cityofpleasantonca.gov was targeted by Valencialeaks ransomware, one of the most active ransomware groups in our database with 5 confirmed victims globally. The attack was disclosed on September 10, 2024, when cityofpleasantonca.gov appeared on the group's dark web leak site.

cityofpleasantonca.gov is based in United States , operating in the Public Sector sector. United States ranks #1 globally for ransomware attacks, with 9,534 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Valencialeaks typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 19, 2026 04:00 UTC.

Frequently Asked Questions

Was cityofpleasantonca.gov attacked by ransomware?

Yes. cityofpleasantonca.gov was listed as a victim of the Valencialeaks ransomware group on September 10, 2024. The organisation is based in United States and operates in the Public Sector sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked cityofpleasantonca.gov?

cityofpleasantonca.gov was attacked by Valencialeaks ransomware. Valencialeaks is one of the most active ransomware groups, having claimed 5 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the cityofpleasantonca.gov ransomware attack occur?

The ransomware attack on cityofpleasantonca.gov was disclosed on September 10, 2024. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the cityofpleasantonca.gov ransomware attack?

The specific data stolen from cityofpleasantonca.gov has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Public Sector organisation, cityofpleasantonca.gov likely held sensitive business data, client information, and operational records.

How can organisations protect against Valencialeaks attacks?

To defend against Valencialeaks and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.