Malicious code in @nasddatax/common (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1cf5662d7c8759acd7a9a541baddd3bf4787594fafcd38f8a4eaf27bbe57d558) build/index.js appends an eval(atob(...)) trailer after legitimate re-exports. On require, the decoded loader queries public Ethereum JSON-RPC endpoints for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, decodes the 20-byte tx.to value into two IPv4 addresses, fetches an XOR-obfuscated JavaScript payload from http://<ip>:443/0x/cls and http://<ip>:443/0x/ls, decodes an x-payload-b64 response header, and executes the result via eval and a detached spawn('node', ['-e', payload]). Security-relevant identifiers (http, child_process, spawn, method and header strings) are written as \u00XX unicode escapes to hide the behavior. Any application that requires this package runs attacker-controlled code on the installer's machine, and the C2 destination can be rotated on-chain without republishing the package. Package metadata (empty author, empty description, scoped `<scope>/common` name) is consistent with an impostor common-utilities package. ## Source: ghsa-malware (db85c2c336b7b7965deef4783c3eddd656dbaf384c2c73b5d50167ef308fa5e9) 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.
AI Analysis
Technical Summary
The @nasddatax/common npm package version 1.0.21 includes a malicious loader appended to its legitimate exports. Upon requiring the package, the loader decodes an Ethereum transaction's recipient address to obtain two IPv4 addresses. It then fetches XOR-obfuscated JavaScript payloads from these IPs over HTTPS, decodes a custom base64 payload header, and executes the payload via eval and a detached Node.js process. The code uses Unicode escapes to hide key strings related to HTTP requests and process spawning. This design enables attacker-controlled code execution on the installer's machine, with command-and-control endpoints dynamically updated on-chain without republishing the package. The package metadata suggests it is an impostor common-utilities package.
Potential Impact
Any application that installs or requires @nasddatax/common version 1.0.21 will execute attacker-controlled code on the host machine. This leads to full remote code execution capabilities for the attacker, potentially compromising the system, stealing data, or performing other malicious actions. The dynamic C2 server resolution via Ethereum transactions complicates detection and takedown efforts.
Mitigation Recommendations
No official patch or remediation is currently available. Users should immediately remove and avoid installing @nasddatax/common version 1.0.21. Verify dependencies to ensure this package is not included transitively. Monitor for suspicious network connections to unknown IP addresses, especially those resolved from Ethereum blockchain data. Consider using package integrity verification and trusted sources for npm packages to prevent installation of impostor or malicious packages.
Malicious code in @nasddatax/common (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1cf5662d7c8759acd7a9a541baddd3bf4787594fafcd38f8a4eaf27bbe57d558) build/index.js appends an eval(atob(...)) trailer after legitimate re-exports. On require, the decoded loader queries public Ethereum JSON-RPC endpoints for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, decodes the 20-byte tx.to value into two IPv4 addresses, fetches an XOR-obfuscated JavaScript payload from http://<ip>:443/0x/cls and http://<ip>:443/0x/ls, decodes an x-payload-b64 response header, and executes the result via eval and a detached spawn('node', ['-e', payload]). Security-relevant identifiers (http, child_process, spawn, method and header strings) are written as \u00XX unicode escapes to hide the behavior. Any application that requires this package runs attacker-controlled code on the installer's machine, and the C2 destination can be rotated on-chain without republishing the package. Package metadata (empty author, empty description, scoped `<scope>/common` name) is consistent with an impostor common-utilities package. ## Source: ghsa-malware (db85c2c336b7b7965deef4783c3eddd656dbaf384c2c73b5d50167ef308fa5e9) 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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The @nasddatax/common npm package version 1.0.21 includes a malicious loader appended to its legitimate exports. Upon requiring the package, the loader decodes an Ethereum transaction's recipient address to obtain two IPv4 addresses. It then fetches XOR-obfuscated JavaScript payloads from these IPs over HTTPS, decodes a custom base64 payload header, and executes the payload via eval and a detached Node.js process. The code uses Unicode escapes to hide key strings related to HTTP requests and process spawning. This design enables attacker-controlled code execution on the installer's machine, with command-and-control endpoints dynamically updated on-chain without republishing the package. The package metadata suggests it is an impostor common-utilities package.
Potential Impact
Any application that installs or requires @nasddatax/common version 1.0.21 will execute attacker-controlled code on the host machine. This leads to full remote code execution capabilities for the attacker, potentially compromising the system, stealing data, or performing other malicious actions. The dynamic C2 server resolution via Ethereum transactions complicates detection and takedown efforts.
Mitigation Recommendations
No official patch or remediation is currently available. Users should immediately remove and avoid installing @nasddatax/common version 1.0.21. Verify dependencies to ensure this package is not included transitively. Monitor for suspicious network connections to unknown IP addresses, especially those resolved from Ethereum blockchain data. Consider using package integrity verification and trusted sources for npm packages to prevent installation of impostor or malicious packages.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12323
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735747bf8831d53915a0db
Added to database: 08/05/2026, 15:31:19 UTC
Last enriched: 08/05/2026, 17:39:22 UTC
Last updated: 09/15/2026, 08:28:28 UTC
Views: 23
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