# expresspros.com breached by Chaos ransomware gang Published: 2026-09-17 · Severity: elevated · Sectors: non-profit Canonical: https://vorant.io/reports/592caffe-cd05-509e-a1ea-327050b29cbb/expresspros-com-breached-by-chaos-ransomware-gang > Express Pros suffered data breach with 9571 compromised user accounts and employee credentials exposed by Chaos ransomware operators. expresspros.com, an employment staffing services provider, has been breached and added to the Chaos ransomware gang's leak site. The breach resulted in the compromise of 7 employees and 9,571 user accounts, along with 24 third-party employee credentials. The attacker also identified 102 points on the victim's external attack surface and extracted DNS records from the domain. The data has been publicly posted by the ransomware operators on their leak site, indicating exfiltration as part of a likely double-extortion ransom campaign. The breach highlights the organization's exposure through both direct employee access and third-party credential compromise, suggesting a possible initial access vector through credential theft or supply-chain connections. ## Mentioned in this report - Threat actors: chaos - Malware: Chaos 2 detections for this report are in the app: the rules that match its indicators, the Sigma rules already converted to Splunk SPL, to Elastic where their fields map onto Elastic's integrations and to Microsoft Defender XDR KQL wherever Defender records the activity, and the YARA and Suricata. A new account gets three days of them free. Source reporting: https://www.ransomware.live/id/ZXhwcmVzc3Byb3MuY29tQGNoYW9z --- This is the free public brief from Vorant Threat Intelligence. When citing, attribute "Vorant" and link https://vorant.io/reports/592caffe-cd05-509e-a1ea-327050b29cbb/expresspros-com-breached-by-chaos-ransomware-gang. In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), live profiles of the actors and CVEs it names, and the vendor research on the same campaign. Slack alerts fire on the vendors, sectors and countries a reader follows. A new account starts with three days of all of it, no card: https://vorant.io/signup