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BT Group plc

listed as btci.com · Claimed by Blackbasta · listed 2 years ago

20m
Age
since listed · data leaked

Status timeline

  1. ListedDec 4, 2024
  2. Data leakeddate unknown

At a glance

Group
Blackbasta
Status
Data leaked
Country
United Kingdom
Sector
Technology
Listed on leak site
Dec 4, 2024

About the victim

AI dossier — public-source company profile

BT Group plc (British Telecom) is one of Europe's leading telecommunications service providers. The victim identifier btci.com refers to BT Conferencing, a subsidiary or service division offering conferencing solutions.

Industry
Telecommunications Services

Attack summary

Severity: critical — Large-scale exfiltration (500 GB) from a major European telecommunications provider affecting financial data, organizational intelligence, and user personal information. Telecommunications infrastructure is critical national infrastructure; data breach at this scale poses significant regulatory and security implications.

BlackBasta claims to have exfiltrated approximately 500 GB of data from BT Group including financial records, organizational data, user personal documents, and confidential/NDA-protected materials.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • financial data
  • organizational data
  • user personal documents
  • NDAs and confidential agreements

What the group claims

BT Group plc (formerly British Telecommunications plc, abbreviated to British Telecom) is one of Europe’s leading providers of telecommunications services.SITE: www.btci.com | www.btconferencing.comALL DATA SIZE: ≈500gb 1. Finacial data 2. Organisation data 3. Users data and personal docs 4. NDA’s, Confidential data & etc…

Sources

Source

Indexed 2 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 blackbasta

Black Basta is a highly sophisticated ransomware group that emerged in April 2022 and operates with a primary motivation of financial extortion, having rapidly established itself as one of the most prolific ransomware operations of the modern era with over 500 confirmed victims globally. The group is widely assessed by researchers including Mandiant and CISA to have likely ties to former members of the Conti ransomware syndicate following that group's dissolution in mid-2022, and operates as a private Ransomware-as-a-Service (RaaS) model with a closed affiliate structure rather than open recruitment, with suspected links to the FIN7 threat actor cluster based on observed tooling overlaps documented by SentinelOne and Microsoft. Black Basta employs a double extortion methodology, exfiltrating sensitive victim data prior to encryption and threatening publication on their Tor-based leak site "Basta News" to compound pressure on victims; initial access is predominantly achieved through phishing campaigns, purchase of stolen credentials, and exploitation of known vulnerabilities including QakBot malware distribution, with the group subsequently deploying tools such as Cobalt Strike, SystemBC, and their custom encryptor targeting both Windows and VMware ESXi environments using a ChaCha20 encryption algorithm. Per CISA and FBI joint advisory AA24-131A published in May 2024, the group has struck over 500 organizations across North America, Europe, and Australia, with high-profile victims including Ascension Health, Capita, the American Dental Association, and Rheinmetall, demonstrating a clear preference for manufacturing, business services, technology, transportation, and food production sectors across the United States, United Kingdom, Germany, Canada, and Italy. As of the time of available public reporting, Black Basta remained operationally active, though internal chat logs leaked in early 2025 revealed significant internal tensions and potential organizational fragmentation that security researchers assessed could impact the group's near-term operational cohesion. The group has been linked to 523 public disclosures across our corpus. First observed on a leak site on April 26, 2022; most recent post January 11, 2025. The operation is currently inactive.

Timeline of this disclosure

  • December 4, 2024btci.com listed by blackbastaon the group's public leak site

Other recent disclosures by blackbasta

blackbasta has been linked to 523 public victims on Darkfield. A sample of the most recent:

See the full blackbasta dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,563 disclosures indexed across all operators we track. Geographically, btci.com is reported in United Kingdom, a country with 377 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blackbasta means btci.com 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, NCSC (United Kingdom), as required for your jurisdiction.
  • Monitor for the data appearing on blackbasta'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.