bnpl-blocks-desktop-bnpl-image-with-captionnpm
bnpl-blocks-desktop-bnpl-image-with-caption is a confirmed malicious npm package (MAL-2026-12929) that executes malicious code on install (malicious version 35.4.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in bnpl-blocks-desktop-bnpl-image-with-caption (npm)
What this malware does
On require of this package, index.js loads ext.js which selects a platform-specific asset name and downloads a native binary from obfuscated Cloudflare Workers hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev), assembled at runtime by joining split string fragments. If HTTPS delivery fails, the code falls back to a DNS TXT-record channel under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, concatenating and base64-decoding chunked TXT responses into a binary payload. The payload is written to /tmp or %TEMP% under disguised names such as dotnet_diag<tag>.exe and.cache_<tag>, chmodded 0755, and spawned detached via cp.spawn("/bin/sh", ["-c", fp+" &"], {detached:true}) or spawn("cmd",...). No hash or signature verification is performed. The 'child_process' module identifier is also reconstructed via string-splitting, and cover-story comments label the behavior as 'telemetry' and 'analytics' with a state file 'analytics_state'. The package's stated purpose (a reusable UI block) does not justify any binary fetch or execution.
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 bnpl-blocks-desktop-bnpl-image-with-caption (version 35.4.2). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging bnpl-blocks-desktop-bnpl-image-with-caption across your stack and pipelines.
If you installed it — respond
Remove bnpl-blocks-desktop-bnpl-image-with-caption 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 bnpl-blocks-desktop-bnpl-image-with-caption 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 bnpl-blocks-desktop-bnpl-image-with-caption 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 bnpl-blocks-desktop-bnpl-image-with-caption-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.