On March 31, the cybersecurity community faced a major scare when two malicious versions of Axios, a wildly popular JavaScript library, were briefly published to the npm registry.
These compromised versions contained a hidden threat that installed a remote access trojan on macOS, Windows, and Linux systems.
Now, the project’s lead maintainer has revealed exactly how the attackers pulled it off. Rather than finding a flaw in the code, the hackers targeted the human element through a highly sophisticated social engineering campaign.
How The Attack Unfolded
Jason Saayman, the lead maintainer for Axios, recently shared the details of the breach on GitHub. He explained that hackers disguised themselves as a well-known, legitimate company looking to collaborate. They built a convincing trap to establish trust over time.
The attacker’s coordinated campaign included:
- Cloned corporate identities to appear legitimate.
- A fake Slack workspace for professional communication.
- Staged virtual meetings to build a personal connection.
- A malicious installation file disguised as a necessary tool.
Once Saayman installed the malicious file, the attackers gained remote access to his machine. From there, they hijacked his active web browser sessions and stole his cookies. This gave them direct control over his npm and GitHub accounts.
Because the hackers were operating within an already authenticated session, standard security measures such as two-factor authentication (2FA) could not stop them.
The Open-Source Burden
This incident highlights a dangerous trend in software supply chain attacks. Axios is downloaded millions of times a week and is deeply embedded in the infrastructure of countless corporate applications and developer tools.
Despite its massive footprint, it relies on a very small team of dedicated individuals.
When hackers realize a software package is too secure to break into directly, they shift their focus to the people who manage it. This mirrors the long-game tactics seen in the recent xz utils backdoor incident.
According to Socket research, maintaining critical open-source software takes a heavy personal toll.
Solo developers are constantly expected to manage releases, review code, fix bugs, and defend against advanced threats. They usually carry this burden without corporate funding or dedicated security teams to support them.
As Saayman noted after the incident, it is disheartening that developers cannot simply focus on building useful tools without constantly guarding against exploitation.
The Axios breach serves as a stark reminder that securing our software supply chain requires more than just good code. It requires protecting and supporting the human maintainers who keep the infrastructure running.
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