Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
WI
Ransomware Victim Business Services

Williams, Kastner & Gibbs PLLC

Ransomware attack by Silentransomgroup · Disclosed May 6, 2025 · 🇺🇸 United States

williamskastner.com

Date Disclosed
May 6, 2025
2025
Threat Group
Silentransomgroup
118 total victims
Country
🇺🇸 United States
Industry
Business Services

Incident Analysis

Williams, Kastner & Gibbs PLLC was targeted by Silentransomgroup ransomware, one of the most active ransomware groups in our database with 118 confirmed victims globally. The attack was disclosed on May 6, 2025, when Williams, Kastner & Gibbs PLLC appeared on the group's dark web leak site.

Williams, Kastner & Gibbs PLLC is based in United States , operating in the Business Services sector. United States ranks #1 globally for ransomware attacks, with 9,028 victims in our database.

Sector context: Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

Silentransomgroup 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: Aug 5, 2026 20:00 UTC.

Frequently Asked Questions

Was Williams, Kastner & Gibbs PLLC attacked by ransomware?

Yes. Williams, Kastner & Gibbs PLLC was listed as a victim of the Silentransomgroup ransomware group on May 6, 2025. The organisation is based in United States and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Williams, Kastner & Gibbs PLLC?

Williams, Kastner & Gibbs PLLC was attacked by Silentransomgroup ransomware. Silentransomgroup is one of the most active ransomware groups, having claimed 118 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Williams, Kastner & Gibbs PLLC ransomware attack occur?

The ransomware attack on Williams, Kastner & Gibbs PLLC was disclosed on May 6, 2025. 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 Williams, Kastner & Gibbs PLLC ransomware attack?

The specific data stolen from Williams, Kastner & Gibbs PLLC 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 Business Services organisation, Williams, Kastner & Gibbs PLLC likely held sensitive business data, client information, and operational records.

How can organisations protect against Silentransomgroup attacks?

To defend against Silentransomgroup 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.