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ARM

Claimed by D1R · listed 2 days ago

1d
Age
since listed · data leaked

Status timeline

  1. ListedJul 13, 2026
  2. Data leakeddate unknown

At a glance

Group
D1R
Status
Data leaked
Country
United Kingdom
Sector
Technology
Listed on leak site
Jul 13, 2026

About the victim

AI dossier — public-source company profile

Arm is a global semiconductor and intellectual property (IP) licensing company headquartered in the United Kingdom. It designs processor architectures and tools used across cloud computing, AI, mobile devices, automotive, and embedded systems, operating under a licensing business model rather than manufacturing.

Industry
Semiconductor & IP Licensing

Attack summary

Severity: high — Confirmed exfiltration of internal tools and certificates that enable bypass of multi-factor authentication on Arm's primary distribution infrastructure. This compromises the integrity of software supply chains for multiple downstream companies relying on Arm IP and tools. The attack undermines security controls protecting sensitive IP licensing and deployment workflows.

D1R claims access to an Arm facility via credentials obtained from a Synopsys data breach. The group extracted the 'Athena Download Manager' tool, which uses an SSL certificate to bypass Arm's multi-factor authentication (email/SMS 2FA) controls on file downloads from arm.com.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Athena Download Manager tool
  • SSL certificates for Arm product companies
  • Internal deployment/access tooling

What the group claims

Thanks to leaked database by Synopsys, a roadmap was provided Many other group leaks were cross-referenced and thoroughly analyzed One of the leaked companies gave our team access to ARM center Severely incapacitated by 2FA email/sms-code required by ARM on every step, we were still able to download an interesting tool: Athena Download Manager That requires an SSL certificate of a company that owns ARM products, and downloading by means of Athena allows to bypass multiple 2FA checks that are required when downloading same files from www.arm.com This is now free for download to any reverse engineer on Earth and beyond, thanks to Synopsys company data negligence:

Sources

Source

Indexed 2 days 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 D1R

D1R is a ransomware group first observed in July 2026 with an apparent primary motivation of financial gain, though limited public documentation exists given the group's recent emergence and relatively small operational footprint. The group has claimed or been attributed to three known victims to date, with targeting concentrated in the United States, Great Britain, and Germany, suggesting a focus on English- and German-speaking Western economies. Based on available victim telemetry, D1R has demonstrated a preference for the Technology and Manufacturing sectors, which are commonly targeted by financially motivated ransomware actors due to the operational disruption leverage these industries present and their historically higher propensity to pay ransoms. No authoritative public reporting from CISA, FBI, Mandiant, or equivalent reputable security research organizations has been published at this time confirming D1R's specific initial access vectors, tooling, encryption methods, or affiliation with known ransomware-as-a-service ecosystems, and it remains unclear whether the group operates independently or as part of a broader affiliate network. Given the group's July 2026 first observation date and minimal victim count, D1R should be considered an emerging or nascent threat actor warranting continued monitoring, as early-stage ransomware groups frequently escalate in tempo and sophistication as they mature their operations and, potentially, affiliate with established RaaS platforms. Current status cannot be definitively assessed pending further public attribution and reporting from law enforcement or security research communities. The group has been linked to 3 public disclosures across our corpus. First observed on a leak site on July 13, 2026. The operation is currently active.

Timeline of this disclosure

  • July 13, 2026ARM listed by D1Ron the group's public leak site

Other recent disclosures by D1R

D1R has been linked to 3 public victims on Darkfield. A sample of the most recent:

See the full D1R dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, ARM is reported in United Kingdom, a country with 373 ransomware disclosures in our corpus.

If your organisation is affected

A listing by D1R means ARM 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 D1R'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.