Cyber Threat Intelligence
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Ransomware Victim Government & Defense

City of Mitchell

Ransomware attack by Storm · Disclosed August 24, 2026 · 🇺🇸 United States

cityofmitchellsd.gov

Date Disclosed
Aug 24, 2026
2026
Threat Group
Storm
49 total victims
Country
🇺🇸 United States
Industry
Government & Defense

ThreatAI Analysis

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

City of Mitchell was listed on dark web leak site Storm's database on 24 August 2026; the city, based in United States, operates in Government & Defense sector with headquarters at 612 N Main Street, Mitchell, SD 57301.

About City of Mitchell

Mitchell is a city in and the county seat of Davison County, South Dakota, United States. Mitchell is the principal city of the Mitchell Micropolitan Statistical Area, which includes all of Davison and Hanson counties. The company headquarters is located in 612 N Main Street, Mitchell, SD 57301, United States. 51-200 Employees

Source record: ransomware.live

About the Storm group

Storm has listed 9 victims since August 2026.

Incident Analysis

City of Mitchell was targeted by Storm ransomware, one of the most active ransomware groups in our database with 49 confirmed victims globally. The attack was disclosed on August 24, 2026, when City of Mitchell appeared on the group's dark web leak site.

City of Mitchell is based in United States , operating in the Government & Defense sector. United States ranks #1 globally for ransomware attacks, with 9,434 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.

Storm 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 7, 2026 20:00 UTC.

Frequently Asked Questions

Was City of Mitchell attacked by ransomware?

Yes. City of Mitchell was listed as a victim of the Storm ransomware group on August 24, 2026. The organisation is based in United States and operates in the Government & Defense sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked City of Mitchell?

City of Mitchell was attacked by Storm ransomware. Storm is one of the most active ransomware groups, having claimed 49 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the City of Mitchell ransomware attack occur?

The ransomware attack on City of Mitchell was disclosed on August 24, 2026. 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 City of Mitchell ransomware attack?

The specific data stolen from City of Mitchell 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 Government & Defense organisation, City of Mitchell likely held sensitive business data, client information, and operational records.

How can organisations protect against Storm attacks?

To defend against Storm 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.