bigops-chat-transfernpm
bigops-chat-transfer is a confirmed malicious npm package (MAL-2026-12156) that executes malicious code on install (malicious version 35.3.6). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in bigops-chat-transfer (npm)
What this malware does
On require() of bigops-chat-transfer, platform.js reconstructs one of three Cloudflare workers.dev hostnames from split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), downloads a platform-specific native binary over HTTPS, and — if HTTPS fails — falls back to a DNS-TXT covert channel under *.dl.wel1.ru that reconstructs a base64-encoded binary from sequentially numbered TXT records. The downloaded bytes are written to /var/tmp/.cache<uid> on Unix or %TEMP%/dotnet_diag_<uid>.exe on Windows, chmod 0755'd, and spawned detached via /bin/sh -c or cmd /c start. A.analytics_state lock file provides rate-limit persistence, and the naming (dotnet_diag, analytics_state) is a cover story masquerading as.NET diagnostics telemetry. Destination hosts are not the package publisher's infrastructure, the fetched executable is opaque and unverified, and execution is triggered by ordinary import of the module.
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-transfer (version 35.3.6). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging bigops-chat-transfer across your stack and pipelines.
If you installed it — respond
Remove bigops-chat-transfer 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-transfer 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-transfer 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-transfer-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.