Was lstaff.com / atworksprofessional / atworks.com hit by ransomware?

lstaff.com / atworksprofessional / atworks.com was listed by the Revil 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 Revil ransomware group?

Revil 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 lstaff.com / atworksprofessional / atworks.com breach?

Revil published data attributed to lstaff.com / atworksprofessional / atworks.com. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

LStaff / AtWorks Professional Staffing

listed as lstaff.com / atworksprofessional / atworks.com · Claimed by Revil · listed 5 years ago

58m

Age

since listed · data leaked

Status timeline

ListedSep 9, 2021
Data leakeddate unknown

At a glance

Group: Revil
Status: Data leaked
Country: United States
Sector: Business Services
Listed on leak site: Sep 9, 2021

About the victim

AI dossier — public-source company profile

LStaff.com and AtWorks Professional Staffing (atworksprofessional.com / atworks.com) appear to be related staffing and workforce solutions entities operating in the United States, providing temporary and permanent placement services to businesses. The combined branding suggests a professional staffing operation serving employers and job seekers across multiple sectors. No further detail is available from the captured site content.

Industry: Staffing & Workforce Solutions

Attack summary

Severity: high — A staffing firm holds significant volumes of PII for both job candidates and client employees (names, SSNs, employment history, financial data); REvil reaching the data_published stage confirms exfiltration, making this high severity. Insufficient evidence to elevate to critical without confirmed regulated-data (e.g., medical or government) exposure at scale.

REvil ransomware group claimed an attack on the victim and has progressed to the data_published stage, indicating exfiltration and likely publication of stolen data. No specific data volume or ransom demand was captured in the available post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Employee records
Client business data
Candidate personal information
HR and payroll data

Sources

Victim sitelstaff.com

Source

Indexed 5 years 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 Revil

REvil, also known as Sodinokibi, was a highly sophisticated ransomware-as-a-service operation that emerged in April 2019 and quickly became one of the most prolific and financially successful cybercriminal organizations, primarily motivated by financial gain. The group is believed to have originated from Russia, operating as a RaaS model where core developers rented their ransomware tools to affiliate criminals, and maintained connections to the now-defunct GandCrab ransomware operation with some researchers suggesting personnel overlap. REvil primarily gained initial access through exploiting vulnerabilities in remote desktop protocol implementations, phishing campaigns, and supply chain attacks, employing double extortion tactics where they exfiltrated sensitive data before encryption and threatened to publish it on their "Happy Blog" leak site if ransoms were not paid, using advanced encryption methods that made file recovery nearly impossible without payment. The group conducted several high-profile attacks including the devastating supply chain attack against Kaseya in July 2021 that affected thousands of downstream customers, attacks on major corporations like JBS Foods, and demanded ransoms reaching up to $70 million, ultimately leading to increased law enforcement attention and pressure from international authorities. Following coordinated law enforcement actions and mounting pressure from the U.S. and Russian governments in late 2021, REvil's infrastructure was taken down and the group ceased operations, with several suspected members reportedly arrested by Russian authorities. The group has been linked to 96 public disclosures across our corpus. First observed on a leak site on August 26, 2019; most recent post November 28, 2022. The operation is currently inactive.

Also tracked as: Sodinokibi.

Timeline of this disclosure

September 9, 2021lstaff.com / atworksprofessional / atworks.com listed by Revilon the group's public leak site

Other recent disclosures by Revil

Revil has been linked to 96 public victims on Darkfield. A sample of the most recent:

See the full Revil dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, lstaff.com / atworksprofessional / atworks.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Revil means lstaff.com / atworksprofessional / atworks.com 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 Revil'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.