MalwarePublished 5 Aug 2026

bigops-telephony-client (npm) · Malicious Code

Affects bigops-telephony-clientSource GCVE Database

Malicious package : remove bigops-telephony-client and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 19:35 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12841

What to do

Remove bigops-telephony-client from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmbigops-telephony-client	Affected =35.7.6	Fixed in–

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Description

The bigops-telephony-client npm package version 35.7.6 contains malicious code that downloads and executes attacker-controlled binaries on affected systems. It uses obfuscated domain names and DNS TXT record channels to deliver payloads, disguises dropped files as legitimate system tools, and executes them detached from the main process. This supply-chain dropper compromises any system running the package, potentially allowing full attacker control.

Impact

Any system with bigops-telephony-client version 35.7.6 installed or running is considered fully compromised. The attacker can execute arbitrary code with the privileges of the affected process, potentially gaining full control over the system. All secrets and keys stored on the compromised system should be considered exposed and must be rotated immediately from a secure environment. Removing the package alone may not eliminate all malicious components due to the detached execution and persistence mechanisms.

Defensive guidance

Immediate removal of the bigops-telephony-client package version 35.7.6 is recommended. All secrets and credentials stored on affected systems should be rotated from a separate, uncompromised environment. Due to the nature of the compromise, a full system investigation and remediation may be necessary.

Summary

The bigops-telephony-client package (version 35.7.6) includes code that, upon requiring the package, downloads platform-specific binaries from obfuscated Cloudflare Workers domains. These binaries are saved to temporary locations with names mimicking legitimate .NET diagnostic tools, given executable permissions, and executed detached from the main process. A fallback delivery mechanism uses DNS TXT records from specific domains to reconstruct a base64-encoded payload. Additionally, a parallel drop-and-execute implementation exists in the telemetry.js module, currently unreferenced by the main entry point. This combination of techniques constitutes a supply-chain dropper that delivers arbitrary attacker-controlled code to all consumers of this package.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:35 UTC

Technical details

References

Community reviews