Was TANI & ABE hit by ransomware?

TANI & ABE was listed by the blacknevas ransomware operation (Japan), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the blacknevas ransomware group?

blacknevas is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the TANI & ABE breach?

blacknevas published data attributed to TANI & ABE (~1.2 TB), around 145146 files records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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TANI & ABE

Claimed by Blacknevas · listed 1 year ago

1.2 TB

Data size

145146 files records

12m

Age

since listed · data leaked

Status timeline

ListedAug 6, 2025
Data leakeddate unknown

At a glance

Group: Blacknevas
Status: Data leaked
Country: Japan
Listed on leak site: Aug 6, 2025
Data size: 1.2 TB
Records: 145146 files

About the victim

AI dossier — public-source company profile

TANI & ABE is a Japanese patent and trademark law firm (弁理士法人) established in 1977 and headquartered in Tokyo. The firm provides services in patent applications, design and trademark registration, and licensing contracts.

Industry: Legal Services - Intellectual Property & Patent Law
Address: Tokyo, Japan
Founded: 1977

Attack summary

Severity: high — Law firm handling sensitive intellectual property and client confidential information; likely exposure of attorney-client privileged communications and trade secrets belonging to multiple clients, even though specific proof count and data inventory are not detailed in the post.

The blacknevas group claims to have attacked TANI & ABE and published data from the firm. No specific details are provided in the truncated leak post regarding what was encrypted, exfiltrated, or the nature of the data compromised.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client documents
Patent filings
Trademark registration records
Legal contracts

What the group claims

TANI & ABE is a patent and trademark law firm established in 1977 and headquartered in Tokyo, Japan.

The leak post

captured from the group's site

[ Speed Group (speedgroupe.com / speedfrance.fr) is a global leader in the manufacture of synthetic monofilament lines. The company was founded in France over 40 years ago. Today, Speed Group operates four manufacturing plants located in France, the USA, Chile, and South Africa. It specializes in the extrusion of high-quality monofilaments—particularly trimmer lines—and ranks among the world's leading players in this sector. The company also produces technical monofilaments for other industries. Since 2004, it has been part of the Italian Emak Group (Tecomec). Speed Group is renowned for its high product quality, rigorous production controls, and excellent service.Cyber Attack on Speed Group (speedgroupe.com)World leader in monofilament lines manufacturing — Speed Group — has been hit by a cyber attack. Hackers breached the company’s systems and stole confidential data.More than 1 terabytes of information were exfiltrated, including technical documentation, customer databases and production data from factories in France, USA, Chile, and South Africa.The company has not issued an official statement yet. #SpeedGroup #CyberAttack #DataBreach ](http://ctyfftrjgtwdjzlgqh4avbd35sqr…

Screenshot of the leak post

Sources

Source

Indexed 1 year 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 blacknevas

Blacknevas is an emerging ransomware group that was first observed in August 2025, appearing to be primarily financially motivated based on their targeting patterns and operational characteristics. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their diverse geographic targeting suggests either a distributed operation or broad opportunistic approach. Based on available victim data, Blacknevas has compromised at least 23 organizations across multiple countries, with the United States, Spain, India, Japan, and Thailand being the most frequently targeted nations, while their sector focus spans technology, manufacturing, energy, and consumer services industries, suggesting they employ opportunistic rather than sector-specific targeting methodologies. The group's attack vectors, specific tools, and whether they operate as a Ransomware-as-a-Service model or maintain independent operations have not been publicly documented by major cybersecurity firms or government agencies. Due to the group's recent emergence in August 2025, there is insufficient public reporting from established sources like CISA, FBI, or major threat intelligence providers to detail notable campaigns or significant attacks beyond the confirmed victim count. Given the recency of their first observed activity, Blacknevas appears to remain active as of late 2025, though comprehensive threat intelligence profiles from authoritative sources have yet to be published. The group has been linked to 47 public disclosures across our corpus. First observed on a leak site on August 6, 2025; most recent post August 14, 2026. The operation is currently active.

Also tracked as: black nevas.

Timeline of this disclosure

August 6, 2025TANI & ABE listed by blacknevason the group's public leak site

Data size: 1.2 TB
Records: 145146 files

Other recent disclosures by blacknevas

blacknevas has been linked to 47 public victims on Darkfield. A sample of the most recent:

See the full blacknevas dossier →

Sector and geography

Geographically, TANI & ABE is reported in Japan, a country with 220 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blacknevas means TANI & ABE 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, JPCERT/CC (Japan), as required for your jurisdiction.
Monitor for the data appearing on blacknevas'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.