Planungsgruppe M+M AG
Planungsgruppe M+M AG is a German Aktiengesellschaft headquartered in Böblingen, Baden-Württemberg, with approximately 432 employees across 10 offices (Böblingen, Stuttgart, München, Nürnberg, Regensburg, Ingolstadt, Augsburg, Esslingen, Mannheim, Frankfurt). Annual revenue: approximately €52 million. The firm provides architecture, urban planning, structural engineering, building physics, fire protection, BIM, landscape planning, and interior design services. Over 5,200 projects completed across decades of operation. The exfiltrated dataset spans two complete file servers (MMBB04, MMBB05), plus the DATEV financial processing archives, SFirm banking software databases, the ELO document management system, Outlook email archives (PSTs), and payroll/HR data — a total of 268 GB across approximately 124,000 files, covering 2006 to 2026.
Incident Details
- Threat Group
- aurora
- Victim / Organization
- Planungsgruppe M+M AG
- Website / Domain
- dieplanungsgruppe.de
- Industry Sector
- Professional Services
- Country / Region
- 🇩🇪 DE
- Date Discovered
- Monday, August 17, 2026
What This Listing Means
Posting on aurora's ransomware leak site typically signals that the threat actor claims to have:
- ▸Gained unauthorized access to the organization's network via phishing, exposed credentials, or an unpatched vulnerability
- ▸Exfiltrated sensitive data — potentially including financial records, PII, customer data, or trade secrets
- ▸Deployed ransomware to encrypt systems and disrupt operations
- ▸Issued a ransom demand with a deadline to publish all stolen data publicly if unpaid
Open Source Investigation
Is This Your Organization?
Security Arsenal provides 24/7 ransomware incident response. We contain active attacks, support ransom negotiation decisions, perform forensic analysis, and recover your data.
Get Emergency ResponseIR Services OverviewProtect Your Organization
- AlertMonitor
Dark web & ransomware monitoring for your domains
- Managed SOC & MDR
24/7 threat detection and response
- Penetration Testing
Find ransomware entry points before attackers do