Which versions of envpack-conf are malicious?

The following npm versions of envpack-conf are flagged malicious: 1.0.1. Treat any of these as compromised.

How do I remediate envpack-conf if I installed it?

envpack-conf establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

I already installed envpack-conf — how do I know if it already compromised me?

If envpack-conf 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.

Is envpack-conf part of a known attack campaign?

Yes — envpack-conf is associated with the IN-MAL-2026-017609, IN-MAL-2026-017617 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find envpack-conf across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for envpack-conf (version 1.0.1).

Malicious package

envpack-confnpm

Advisory published Aug 12, 2026Updated Aug 12, 2026

envpack-conf is a confirmed malicious npm package (MAL-2026-13921) that opens a backdoor for remote access (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in envpack-conf (npm)

MAL-2026-13921

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall envpack-conf

What this malware does

envpack-conf 1.0.1 is a trojanized copy of the pkg-conf utility. index.js appends a top-level async IIFE that runs whenever the module is imported. The IIFE queries public Ethereum RPC endpoints (eth.blockscout.com/api, 1rpc.io/eth, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) for transactions sent from the attacker address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, decodes the to field of those transactions into two IPv4 addresses, fetches an XOR-encrypted second-stage payload from those hosts at path /0x/cls, and executes the decrypted payload with both eval() and spawn('node',['-e',<payload>],{detached:true,stdio:'ignore'}).unref(), giving a detached child process on the installer's host. Every sensitive identifier (module names http/https/zlib/child_process, hostnames, HTTP methods, header names, the attacker address, the RPC URLs, request paths, and global variable names) is written as \uXXXX-escaped literals to evade static analysis. The package name and README (devpack-conf) impersonate Sindre Sorhus's pkg-conf; package.json lists the author as 'Sinde Sorus' [email protected], a typosquat of the real maintainer. The legitimate pkg-conf source is preserved above the injected block as cover.

Malicious versions

1 flagged

1.0.1

Indicators of compromise (SHA-256)

a061ac72b9e392fee182ad4873aab0cc9a64694a11228438a7838343b96d338f

df4b13486d2134e1bec02ca3519e60d721da2d320c37ad7c8ffe96f29799eb20

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for envpack-conf (version 1.0.1).
If you installed it — respond
envpack-conf establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If envpack-conf 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. envpack-conf on npm has been identified as a malicious package (version 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-017609IN-MAL-2026-017617

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks envpack-conf-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

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