Promepla Data Breach

Promepla, a manufacturing company based in Argentina, has been listed as a victim on the RansomHouse ransomware group’s dark web portal, published on June 16, 2026. SOCRadar’s Dark Web Monitoring service identified the listing. Promepla operates in the manufacturing sector, which is a frequent target for RansomHouse. This marks the company as the first Argentine victim listed by the group in this period. RansomHouse has claimed 7 other victims in the 60 days preceding this listing. The group’s recent activity targets manufacturing and technology sectors, with agriculture and food production also represented. Geographically, victims are spread across the United States, Argentina, and Hong Kong. Other manufacturers targeted by RansomHouse include Jiangsu Zenergy Battery Technologies, Ma Pak Leung Company Limited, Aegle Aviation, and Karl Chevrolet.

SOCRadar’s stealer-log telemetry revealed a severe exposure for the promepla.com domain, with 12 corporate credentials for Microsoft Entra ID, 2 for the company’s web property, and 4 for a third-party consumer service. This indicates a risk of compromised employee endpoints. The Microsoft Entra ID single-sign-on surface and the company’s own domain are considered high-value targets. The data suggests corporate intrusion risk with credentials potentially unrotated or persistently infected endpoints from August 2025 through mid-June 2026. Stealer-harvested credentials are a common initial access vector for ransomware groups like RansomHouse. They source logs from underground marketplaces, validate credentials, and use them to gain access to systems before deploying ransomware. While not confirmed, the observed credential exposure aligns with the typical kill chain for such incidents, involving corporate identities from infected endpoints within the leak site listing timeframe. CTI teams are advised to prioritize forced password resets and phishing-resistant MFA for affected Entra ID accounts and hunt for stealer artifacts within the manufacturing environment.