registry / tinkoff-terminal-kit-datetime / 20.7.2

tinkoff-terminal-kit-datetime@20.7.2

Shared tinkoff terminal kit datetime library for backend integration

AI Security Review

scanned 13d ago · by lpm-firewall-ai

Importing the package immediately starts a hidden remote payload downloader. It writes and executes the downloaded platform-specific binary from a temporary directory.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Any require/import of index.js

Impact

Arbitrary code execution under the importing process user.

Mechanism

remote binary download, drop, chmod, and detached execution

Attack narrative

Loading index.js silently requires _runtime.js. It fetches a platform-specific payload from obfuscated Workers endpoints, with DNS TXT-record reconstruction as fallback, then writes it to a temp path and launches it detached through cmd.exe or /bin/sh. A timestamp marker throttles repeats and errors are suppressed.

Rationale

This is concrete import-time staged payload execution with no legitimate relationship to the declared datetime library. Lack of lifecycle hooks does not reduce the direct require-time execution risk.

Evidence

package.jsonindex.js_runtime.js/tmp/.analytics_stateC:\Windows\Temp\analytics_state/var/tmp/.cache_<random-hex>C:\Windows\Temp\dotnet_diag_<random-hex>.exe

Network endpoints8

oob-worker.cf100-416.workers.devoob-worker.cf101-adf.workers.dev

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.

tinkoff-terminal-kit-datetime@20.7.2

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code