Full Stack / 4 min read
Your Application Could Be Compromised If You Use This npm Package
A simple breakdown of the Axios supply chain attack — and what every developer must check right now
Your Application Could Be Compromised If You Use This npm Package
A simple breakdown of the Axios supply chain attack — and what every developer must check right now
Modern applications rely heavily on open-source libraries. One such popular tool is Axios, widely used for handling API requests. But a recent security incident has shown how even trusted dependencies can turn into a serious risk.
Let’s understand what happened, why it matters, and what actions you should take — explained in a clear and beginner-friendly way.
What is Axios and Why Do Developers Use It?
Axios is a promise-based HTTP client used in JavaScript applications. It helps apps communicate with servers without writing complex networking code.
Common use cases include:
- Fetching data from APIs
- Sending form submissions
- Handling backend communication
Axios works in both browsers and Node.js, which makes it a common choice across modern projects.
You Might Be Using It Without Realising
Even if you didn’t install Axios directly, it can still be part of your project through:
- Frontend frameworks like React, Vue, or Angular
- Mobile apps built with React Native
- Desktop apps using Electron
- Internal tools or SaaS platforms
It works quietly in the background — until something goes wrong.
What Happened in This Attack?
Attackers gained access to the credentials of a key Axios maintainer. Using that access, they published compromised versions of Axios to npm.
Affected Versions:
- axios@1.14.1
- axios@0.30.4
These versions included a suspicious dependency:
- plain-crypto-js@4.2.1
This dependency wasn’t even used in the actual code, which made it highly unusual.
The Hidden Danger: Remote Access Trojan (RAT)
The compromised packages executed a script automatically during installation (npm install). This script downloaded and installed a Remote Access Trojan (RAT).
What Can a RAT Do?
- Give attackers remote control of your system
- Steal sensitive data like API keys and tokens
- Access private repositories or deployment systems
- Inject malicious code into your applications
👉 Important: This attack happens during installation — not when your app runs.
Why This Is Serious
These Axios versions are downloaded up to 100 million times per week, meaning the potential impact is very large.
Who Is at Risk?
- Developers installing dependencies
- CI/CD pipelines
- Build and deployment environments
If your system installed these versions with scripts enabled, sensitive data may have been exposed.
Who Is Not Directly Affected?
End users of applications are generally safe because:
- The malicious code does not run in the browser
- It only executes during the install/build phase
Why It’s Hard to Detect
This attack is particularly dangerous because it hides itself well.
After execution, the malware:
- Removes its own traces
- Leaves no suspicious files behind
- Appears clean in dependency folders
Even tools like npm audit won’t detect it.
Indicators of Compromise (IOCs)
If you suspect exposure, look for these signs:
Suspicious Network Activity
- Domain: sfrclak[.]com
- IP: 142.11.206.73
Temporary Files
- macOS:
/Library/Caches/com.apple.act.mond - Linux:
/tmp/ld.py - Windows:
%PROGRAMDATA%\wt%TEMP%\6202033.vbsor.ps1
These files may disappear quickly after execution.
Real-World Example
Consider this scenario:
- Your project runs
npm installin a CI pipeline - It installs a compromised Axios version
- A hidden script executes silently
- Your environment variables (API keys, secrets) are exposed
This could allow attackers to:
- Access your cloud systems
- Modify your codebase
- Compromise your users
All without obvious signs.
What Should You Do Immediately?
If there’s any chance your system installed the affected versions:
Take Action Now:
- Treat the system as potentially compromised
- Rotate all secrets (API keys, tokens, SSH keys)
- Revoke and regenerate credentials
- Review recent deployments and access logs
Prevent Future Risks:
- Lock dependency versions using
package-lock.json - Avoid blindly installing latest versions
- Monitor install-time scripts
- Use secure CI/CD practices
Key Takeaways
- A supply chain attack targeted Axios, a widely used npm package
- Malicious versions installed a hidden dependency that executed a RAT
- The attack occurs during
npm install, not during runtime - Developers and build systems are the main targets
- The malware removes traces, making detection difficult
- Immediate security actions are necessary if affected