tinkoff-boxy-mobile-documentsnpm
tinkoff-boxy-mobile-documents is a confirmed malicious npm package (MAL-2026-12234) that typosquats a legitimate package to trick installs (malicious version 20.1.7). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in tinkoff-boxy-mobile-documents (npm)
What this malware does
On require of the package, index.js loads./platform.js, which selects a per-platform payload path, fetches an unsigned binary over HTTPS from string-split Cloudflare Workers subdomains (oob-worker.cf103-070.workers.dev, cf102-baf.workers.dev, cf101-adf.workers.dev, cf100-416.workers.dev) assembled via array joins, with a DNS TXT covert-channel fallback under *.dl.well1.site (also string-split). The fetched bytes are written to /tmp or %TEMP% under decoy names (analytics_state, dotnet_diag,.cache_), chmodded to 0755, and spawned detached via /bin/sh -c or cmd /c start. Hostnames and resolver domains are obfuscated by array joins and child_process is referenced as require('child_' + 'process'), and the loader is framed with 'analytics/telemetry' comments and DISABLE_TELEMETRY / ANALYTICS_OPT_OUT opt-out gates as cover. lib/telemetry.js contains a duplicate dropper implementation (base64 chunk assembly, cp.spawn('/bin/sh', ['-c', filePath + ' &']), chmod 0755 via computed property) bundled as an alternate loader. The package name impersonates a Tinkoff-branded mobile-documents component.
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
TyposquatFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tinkoff-boxy-mobile-documents (version 20.1.7). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tinkoff-boxy-mobile-documents across your stack and pipelines.
If you installed it — respond
tinkoff-boxy-mobile-documents is a typosquat — you almost certainly intended a legitimately-named package. Remove tinkoff-boxy-mobile-documents, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If tinkoff-boxy-mobile-documents 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 tinkoff-boxy-mobile-documents 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 tinkoff-boxy-mobile-documents-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.