registry / tinkoff-volna-zustate / 20.9.2

tinkoff-volna-zustate@20.9.2

Internal tinkoff volna zustate module for platform services

AI Security Review

scanned 12d ago · by lpm-firewall-ai

Importing the package automatically triggers a remote payload downloader. The payload is persisted briefly in a temp directory and executed detached.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Any runtime require/import of the package entrypoint.

Impact

Arbitrary code execution under the importing process's user account.

Mechanism

remote binary download, DNS fallback, and detached execution

Attack narrative

Requiring index.js silently loads _bridge.js. Its top-level run() downloads a platform-specific executable from rotating remote hosts, or reconstructs one from DNS TXT records, saves it in a temporary directory, marks it executable on Unix, and starts it detached through /bin/sh or cmd.exe. This is an unconsented remote-code-execution chain.

Rationale

The package's normal import path executes a concealed downloader and launches its unverified remote response. Absence of an install hook does not mitigate the import-time RCE.

Evidence

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

Network endpoints7

oob-worker.cf99-9b3.workers.devoob-worker.cf102-baf.workers.dev

On require('tinkoff-volna-zustate'), index.js loads _bridge.js which downloads a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS-TXT covert-channel fallback that reassembles base64 chunks from subdomains under dl.well1.site. The fetched payload is written to /var/tmp/.cache_<rnd> or %TEMP%/dotnet_diag_<rnd>.exe, chmod 0755, and executed detached via /bin/sh -c or cmd.exe /c start. Destination hostnames are assembled from split string fragments via.join("") to evade static string scanning. Package name and description impersonate the Tinkoff brand ('Internal tinkoff volna zustate module for platform services') to encourage dependency-confusion installs. Import-time execution of attacker-controlled bytes against the installer's host with disguised filenames, hidden staging paths, obfuscated destinations, and a DNS-TXT fallback channel is the fingerprint of a supply-chain dropper. ## Source: ghsa-malware (3d43104d92e5d6480fae470d0dc14fbd9ed57922916b0a54dea0c8911f8bf74b) 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.

tinkoff-volna-zustate@20.9.2

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code