Crimson Collective

Also known as: Crimson Collective

The Crimson Collective is a cybercrime group that claimed to have compromised Red Hat’s private GitHub repositories in September 2025. The group asserted it had stolen 570GB of data from Red Hat’s private GitHub repositories, including 28,000 projects and approximately 800 Customer Engagement Reports (CERs) containing sensitive network data. CERs often contain sensitive information including infrastructure details, configurations, and tokens that attackers could exploit to target customers’ networks. The group shared proof of the breach on a Telegram channel, including a full file tree, CER list, and screenshots. The U.S.-based multinational software company confirmed the data breach but did not verify the Crimson Collective’s claims. The group also claimed to have gained access to some of Red Hat’s client infrastructure and stated they had warned the company but were ignored.

Technology

Introduction

The Crimson Collective is a cybercrime group that claimed to have compromised Red Hat’s private GitHub repositories in September 2025. The group asserted it had stolen 570GB of data from Red Hat’s private GitHub repositories, including 28,000 projects and approximately 800 Customer Engagement Reports (CERs) containing sensitive network data. CERs often contain sensitive information including infrastructure details, configurations, and tokens that attackers could exploit to target customers’ networks. The group shared proof of the breach on a Telegram channel, including a full file tree, CER list, and screenshots. The U.S.-based multinational software company confirmed the data breach but did not verify the Crimson Collective’s claims. The group also claimed to have gained access to some of Red Hat’s client infrastructure and stated they had warned the company but were ignored.

Activities and Tactics

Targeted Sectors: Technology

Notable Campaigns

Information pending cataloguing.

Tactics, Techniques, and Procedures (TTPs)

Information pending cataloguing.

Notable Indicators of Compromise (IOCs)

No curated IOCs are currently published for this actor. This section will be updated when stable, attributable indicators are available.

Malware and Tools

  • Crimson
  • ClientMesh
  • CyberGate
  • Cyber Eye RAT
  • Xploit
  • Client Maximus

Attribution and Evidence

Information pending cataloguing.

References

References pending cataloguing.