RAYAB Consulting Engineers Listed by medusa Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On February 22, 2023, RAYAB Consulting Engineers was listed by the medusa ransomware group, which claimed the firm had suffered a ransomware attack involving the exfiltration of internal files. The number of people affected remains unknown, and public detail on the incident is limited to that listing and the description of internal files as the material taken.

For an engineering consultancy that works on water infrastructure and related public services across Iran, any confirmed exposure of internal files would carry practical consequences for the organisation and potentially for partners or individuals whose information appears in project records. What is established so far is the group's claim and the reported nature of the data; much else has not been disclosed.

Breaking down the breach

Public reporting on the incident centres on a leak-site listing by medusa dated February 22, 2023. According to that claim, RAYAB Consulting Engineers experienced a ransomware attack in which internal files were exfiltrated. No confirmed figure for the volume of data, no technical description of the initial access method, and no independent verification of the listing have been supplied in the available facts. The number of individuals affected is recorded as unknown.

Ransomware incidents of this type typically involve both encryption of systems and theft of data for leverage, but the precise sequence, duration, or containment steps in this case are undisclosed. The only concrete characterisation of the exposed material is “internal files exfiltrated in ransomware attack.” Beyond the date of the listing and the organisation named, further operational detail has not been made public.

Inside medusa

Medusa is a known ransomware operation that has appeared in public reporting as a group using double-extortion tactics: encrypting victim systems while also copying data and threatening to publish it if a ransom is not paid. The group has maintained a leak site on which it names organisations and, in some cases, releases sample files or larger archives to pressure payment. Its activity has been documented against a range of sectors internationally.

Listings on such sites are claims by the actors themselves. In this instance, medusa’s appearance of RAYAB Consulting Engineers on its site is treated as an unverified claim that internal files were taken; the facts do not state that the claim has been independently confirmed by the victim or by outside investigators. No statements attributed to medusa beyond the fact of the listing and the general description of exfiltrated internal files are included in the available record.

About RAYAB Consulting Engineers

RAYAB Consulting Engineers was founded in 1984. Public description of the firm states that it draws on the cooperation of experienced specialists to study, design and supervise water and water-transmission infrastructure projects. Its work has included consulting and study services for potable, agricultural and industrial water use, urban and industrial water distribution, wastewater collection and disposal networks, water and wastewater treatment plants, environmental and health services, and water-resources conservation, covering both large and small projects throughout Iran.

Organisations of this kind sit at the intersection of engineering, public infrastructure and environmental management. They routinely hold project documentation, technical designs, contractual records, correspondence with clients and authorities, and internal administrative material. A breach affecting such a firm is consequential because the data can touch critical infrastructure planning, regulatory compliance, and the personal or commercial details of staff, contractors and partner entities.

The information in question

The facts name the exposed material only as internal files exfiltrated in a ransomware attack. No inventory of file types, no count of records, and no confirmation of whether personal data, credentials, financial documents or technical drawings were included has been provided. Exact contents therefore remain unconfirmed.

Consulting engineers working on water and wastewater infrastructure typically maintain design files, survey data, client and supplier records, employee information, and project correspondence. Any of those categories could in principle appear among “internal files,” but that possibility is not the same as confirmed exposure. Until more specific disclosure occurs, the scope of what left the organisation cannot be stated as fact.

Why it matters

For people whose details may sit inside project or administrative files, risks include unwanted contact, social-engineering attempts that reference real project names or relationships, and longer-term misuse of identity or employment data if such material was present. For the organisation, consequences can include operational disruption, contractual or regulatory follow-up, and the need to review access controls and incident-response readiness. Because the scale and precise contents are unknown, the practical impact cannot be quantified from public information alone; the listing itself, however, places the firm and anyone connected to its records in a position where vigilance is warranted.

If your data was in this claimed breach

If you have worked with, been employed by, or otherwise shared information with RAYAB Consulting Engineers, treat the possibility of exposure seriously even while exact contents remain unconfirmed. Practical first steps include:

• Monitor financial and email accounts for unexpected activity or password-reset attempts.
• Enable multi-factor authentication on important accounts where it is not already in use.
• Be cautious of unsolicited messages that reference water-infrastructure projects, Iranian engineering work, or the company by name.
• Change passwords on any accounts that may have reused credentials connected to work email or internal systems.
• Run a free exposure scan of your email address to check whether your information has already surfaced in known breach data sets.

Public detail on this incident is limited. Further confirmed information, if it emerges, should be weighed against official notices from the organisation itself rather than solely against actor claims.

AICompiled with AI assistance from public sources and published under our editorial standards.