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Cyber Threat
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Ransomware victim Manufacturing

Chemtron RiverBend

Listed by Weyhro on · organisation based in United States

crbwater.com

Disclosed
Aug 11, 2025
Leak-site listing date
Threat group
Weyhro
14 victims listed
Country
United States
#1 most targeted
Sector
Manufacturing

ThreatAI analysis

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

About the Weyhro group

Weyhro is a data-extortion group (relying on data theft and leak threats without file encryption) that launched a Tor leak site in March 2025, focusing on manufacturing, financial services, and real estate sectors with victims in the US, Italy, and Canada. Weyhro has listed 14 victims since December 2024.

Incident analysis

Chemtron RiverBend was listed by Weyhro ransomware, a group with 14 victims recorded in this database. The listing appeared on the group's leak site on August 11, 2025.

Chemtron RiverBend is based in United States and operates in the Manufacturing sector. United States ranks #1 worldwide for ransomware disclosures, with 9,972 victims in this database.

Sector context. Manufacturing companies are frequently targeted because production downtime directly translates to financial loss. Ransomware operators exploit this time-sensitivity to demand higher ransoms and faster payment.

Weyhro typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Chemtron RiverBend attacked by ransomware?

Yes. Chemtron RiverBend was listed as a victim of the Weyhro ransomware group on August 11, 2025. The organisation is based in United States and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Chemtron RiverBend?

Chemtron RiverBend was attacked by Weyhro ransomware. Weyhro is one of the most active ransomware groups, having claimed 14 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Chemtron RiverBend ransomware attack occur?

The ransomware attack on Chemtron RiverBend was disclosed on August 11, 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 Chemtron RiverBend ransomware attack?

The specific data stolen from Chemtron RiverBend 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 Manufacturing organisation, Chemtron RiverBend likely held sensitive business data, client information, and operational records.

How can organisations protect against Weyhro attacks?

To defend against Weyhro 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.