bigops-chat-messagesnpm
bigops-chat-messages is a confirmed malicious npm package (MAL-2026-11511) that executes malicious code on install (malicious version 19.9.8). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in bigops-chat-messages (npm)
What this malware does
On require() of bigops-chat-messages, helpers.js selects a platform-specific remote path, fetches an opaque binary over HTTPS from *.workers.dev hosts whose names are reconstructed at runtime from split string arrays joined with.join(''), with a DNS-TXT base64 fallback resolved against tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site and win.dl.well1.site. The fetched bytes are written to /tmp or %TEMP% under disguised names (.cache<hex>, dotnet_diag_<hex>.exe), chmodded 0755, and spawned detached via spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}).unref() or the Windows cmd equivalent so the child process survives the parent. The package is advertised as a chat-messages interface and has no legitimate need to fetch and execute a platform-specific binary from anonymized hosts at load time. The string-split obfuscation of the destination hostnames, the diagnostics-masquerading filenames, and the detached spawn are consistent with a hostile import-time dropper.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for bigops-chat-messages (version 19.9.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging bigops-chat-messages across your stack and pipelines.
If you installed it — respond
Remove bigops-chat-messages 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 bigops-chat-messages was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks bigops-chat-messages before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks bigops-chat-messages-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.