In late March 2026open on a new tab, Anthropic inadvertently released the internal Claude Code source material as part of an npm package that included a large internal source map file. Although the incident stemmed from a simple packaging mistake, threat actors were quick to capitalize on the resulting attention. Only 24 hours after the leak, they were able to create fake GitHub repositories to distribute credential-stealing malware disguised as “leaked” Claude Code downloads.
This incident demonstrates that security compromise is not limited to software vulnerabilities: human factors and organizational control gaps often serve as catalyst for threats and are primary drivers of material impact. In this blog entry, we will talk about our analysis of the threats capitalizing on this incident, the downstream risks of the leaked source code, and the actions organizations should take next.
Read more…
Source: Trend Micro
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- QR codes sent in attachments are the new favorite for phishers
April 3, 2025
Recently Malwarebytes Labs researchers have been seeing quite a few phishing campaigns using QR codes in email attachments. The lure and the targets are varied, but the use of a QR code to get someone to visit the phishing site is fast becoming a preferred method for cybercriminals. There are several reasons why cybercriminals might want ...
- Australian superannuation funds targeted in suspected cyber attacks
April 3, 2025
Multiple large superannuation funds have been targeted in suspected cyber attacks that led to some members losing several thousand dollars in retirements savings. Hostplus, Rest, AustralianSuper and Australian Retirement Trust are among the providers targeted. The attacks were discovered over the weekend, and follow rising reports of online security threats in Australia with a cyber ...
- RolandSkimmer: Silent Credit Card Thief Uncovered
April 2, 2025
Web-based credit card skimming remains a widespread and persistent threat, known for its ability to adapt and evolve over time. FortiGuard Labs recently observed a sophisticated campaign dubbed “RolandSkimmer,” named after the unique string “Rol@and4You” found embedded in its payload. This threat actor targets users in Bulgaria and represents a new wave of credit card skimming ...
- A Rebirth of a Cursed Existence? Examining ‘Babuk Locker 2.0’ Ransomware
April 2, 2025
Ransomware remains a major threat, causing significant disruption and financial losses to organizations across various sectors. Cybercriminal groups behind these attacks constantly adapt their methods to maximize damage and profit. In early 2025, Rapid7 researchers came across a channel promoting itself as Babuk Locker. Since the original group had shut down in 2021, they decided to ...
- Criminal Actors Steal US Taxpayer Identity to File False Tax Returns and Claim Refunds
April 2, 2025
The FBI is warning the public about criminal actors stealing US taxpayer identities to file false tax returns and fraudulently claim refunds. The FBI’s Internet Crime Complaint Center (IC3) has received over 1,000 complaints about identity theft in connection with tax returns within the past year representing a 26% increase from the previous year. Stolen ...
- Palo Alto Networks gateways facing huge number of possible security attacks
April 2, 2025
Someone may be getting ready to attack Palo Alto Network devices, security researchers are warning after spotting a rise in activity. Analysts from GreyNoise said they observed a “significant surge” in login scanning activity against the company’s PAN-OS GlobalProtect portals, with almost 24,000 unique IP addresses attempting to access these portals in March 2025. “The pattern ...