Was Black Hills Bentonite hit by ransomware?

Black Hills Bentonite was listed by the WALLSTREET ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the WALLSTREET ransomware group?

WALLSTREET is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Black Hills Bentonite breach?

WALLSTREET published data attributed to Black Hills Bentonite. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Black Hills Bentonite

Claimed by Wallstreet · listed 21 days ago

20d

Age

since listed · data leaked

Status timeline

ListedAug 10, 2026
Data leakeddate unknown

At a glance

Group: Wallstreet
Status: Data leaked
Country: United States
Sector: Manufacturing
Listed on leak site: Aug 10, 2026

About the victim

AI dossier — public-source company profile

Black Hills Bentonite LLC is a Wyoming-based producer of sodium bentonite and lignite-related products. They supply industrial and commercial markets including drilling fluids, environmental sealing, absorbents, and metal casting applications.

Industry: Mining & Mineral Processing

Attack summary

Severity: medium — Data has been published by the threat actor, confirming exfiltration. However, no specific sensitive data categories (PII at scale, financial records, trade secrets) are explicitly identified in the post excerpt, and no proof files/screenshots are quantified.

The Wallstreet group claims to have compromised Black Hills Bentonite and published exfiltrated data. Specific details about encryption, data types, or volume are not provided in the available post excerpt.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Business records
Customer data
Industrial specifications

What the group claims

Black Hills Bentonite LLC (bhbentonite.com) is a Wyoming-based producer of high-quality sodium bentonite, along with lignite-related products, supplying global industrial and commercial uses such as drilling fluids, environmental/civil engineering sealing, absorbents (including cat litter), and metal casting/foundry applications

Source

Indexed 21 days ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About WALLSTREET

WALLSTREET has claimed 5 victims and remains active as of July 2026, operating a single onion mirror. The group's limited victim count makes sector or geographic patterns unclear at this stage. The group has been linked to 8 public disclosures across our corpus. The operation is currently active.

Timeline of this disclosure

August 10, 2026Black Hills Bentonite listed by WALLSTREETon the group's public leak site

Other recent disclosures by WALLSTREET

WALLSTREET has been linked to 8 public victims on Darkfield. A sample of the most recent:

See the full WALLSTREET dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,695 disclosures indexed across all operators we track. Geographically, Black Hills Bentonite is reported in United States, a country with 3,165 ransomware disclosures in our corpus.

If your organisation is affected

A listing by WALLSTREET means Black Hills Bentonite appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on WALLSTREET's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.