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Malicious package

tinkoff-terminal-kit-datetimenpm

Advisory published Updated

tinkoff-terminal-kit-datetime is a confirmed malicious npm package (MAL-2026-12280) that typosquats a legitimate package to trick installs (malicious version 20.7.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tinkoff-terminal-kit-datetime (npm)

MAL-2026-12280
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall tinkoff-terminal-kit-datetime

What this malware does

The package's main index.js unconditionally requires runtime.js, which on any require/import selects a platform-specific endpoint and downloads an opaque binary over HTTPS from author-controlled Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS TXT chunked-base64 fallback via tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The destination hostnames are assembled from split string fragments (e.g. "oob-worker.cf100-416.wor"+"ke"+"rs.de"+"v") and require is accessed indirectly (require("child"+"process")) to defeat static analysis. The downloaded bytes are written to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod 0755, and spawned detached via /bin/sh -c or cmd.exe with unref(). There is no version pinning, no hash or signature verification, and the package's declared purpose is a datetime library with no legitimate need for a native binary. A sibling lib/telemetry.js repeats the same child_process + base64 + chmod 755 pattern. The name resembles a Tinkoff-adjacent scope, consistent with a typosquat lure delivering an opaque second-stage payload.

Malicious versions

1 flagged
20.7.2

Indicators of compromise (SHA-256)

3ff5d079ddd6e9ef6bd552f3a33ec5d0c87dcad3dce14013cbf28cbaa37a1dc1

Detection & response playbook

Typosquat
  1. Find it

    Search your lockfiles and build artifacts for tinkoff-terminal-kit-datetime (version 20.7.2).

  2. If you installed it — respond

    tinkoff-terminal-kit-datetime is a typosquat — you almost certainly intended a legitimately-named package. Remove tinkoff-terminal-kit-datetime, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

  3. Did it already run?

    If tinkoff-terminal-kit-datetime 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

No. tinkoff-terminal-kit-datetime on npm has been identified as a malicious package (version 20.7.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-014495

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks tinkoff-terminal-kit-datetime-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.

Explore

tinkoff-terminal-kit-datetime (npm) malicious package — MAL-2026-12280 | O3 Security