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Grande Stevens

Claimed by Blackbyte · listed 4 years ago

47m
Age
since listed · data leaked

Status timeline

  1. ListedAug 28, 2022
  2. Data leakeddate unknown

At a glance

Group
Blackbyte
Status
Data leaked
Country
Italy
Sector
Legal
Listed on leak site
Aug 28, 2022

About the victim

AI dossier — public-source company profile

Grande Stevens is an Italian law firm founded by Franzo Grande Stevens that has provided legal assistance for over fifty years. The firm covers civil, commercial, and corporate law, handling both transactional matters and litigation proceedings. It positions itself as trusted counsel operating under a defined firm-wide policy.

Industry
Legal Services & Law Firm

Attack summary

Severity: high — Data has been published by the group. A law firm holds privileged and confidential client information spanning civil, commercial, and corporate matters, representing significant sensitivity. Exfiltration and publication of such data constitutes a serious breach of attorney-client privilege and business confidentiality.

BlackByte claims to have compromised Grande Stevens and has published data (disclosed status: data_published), suggesting exfiltration of firm and client records, though the specific volume and nature of exfiltrated data are not detailed in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Client legal files
  • Transactional documents
  • Litigation records
  • Corporate law documentation
  • Internal firm communications

What the group claims

Grande Stevens Law Firm, which bears the name of its founder, Franzo Grande Stevens, has provided legal assistance, both transactional and in litigation proceedings, in the areas of civil, commercial and corporate law for over fifty years. The lawyers of the Firm operate on the basis of the principles set out in the Firm's Policy with the goal of being considered by the clients as trusted counsel.

Sources

Source

Indexed 4 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 Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

  • August 28, 2022Grande Stevens listed by Blackbyteon the group's public leak site

Other recent disclosures by Blackbyte

Blackbyte has been linked to 147 public victims on Darkfield. A sample of the most recent:

See the full Blackbyte dossier →

Sector and geography

This disclosure adds to ransomware activity in the Legal sector, which has 241 disclosures indexed across all operators we track. Geographically, Grande Stevens is reported in Italy, a country with 635 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blackbyte means Grande Stevens 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, CSIRT Italia (Italy), as required for your jurisdiction.
  • Monitor for the data appearing on Blackbyte'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.