Malicious code in simplipayng (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1cf21e1f6c1fc8a9e9caa3a8383da1b2fb4dd863fc531e17771209b14284e087) dist/cjs/index.js appends an eval(atob(...)) blob to what appears to be a React Button re-export. The decoded payload queries public Ethereum RPCs for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, extracts two IPv4 addresses encoded in the tx.to field, then fetches XOR-encoded next-stage JavaScript from those IPs over HTTP/HTTPS at the paths /0x/cls and /0x/ls and executes it via eval and spawn('node', ['-e',...], {detached:true}). Network and process sinks are hidden behind base64 wrapping and per-character \uXXXX unicode escapes for require('http'), require('https'), require('child_process'), and 'spawn'. Any project that require()s this package receives arbitrary remote code execution controlled by whoever writes to the on-chain dead-drop address, in a detached Node subprocess. ## Source: ghsa-malware (b4462e97d828e2448139b0e3f348c00cd4f9f5611b7886c6c199796f5895a5a8) 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 simplipayng npm package version 1.0.8 includes a malicious payload embedded in dist/cjs/index.js. This payload decodes a base64-encoded string that, when executed, queries public Ethereum RPC endpoints for the latest transaction from a hardcoded Ethereum address (0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a). It extracts two IPv4 addresses encoded in the transaction's 'to' field, then fetches XOR-encoded JavaScript from these IPs at specific paths (/0x/cls and /0x/ls). The fetched code is executed via eval and a detached Node.js subprocess using child_process.spawn. The code uses heavy obfuscation techniques, including base64 wrapping and Unicode escapes, to hide network and process operations. This design enables arbitrary remote code execution controlled by whoever can write transactions to the specified Ethereum address, effectively creating a blockchain-based dead-drop for malicious payloads.
Potential Impact
Any software project that includes simplipayng version 1.0.8 as a dependency is vulnerable to arbitrary remote code execution. An attacker controlling the Ethereum address can deliver and execute arbitrary JavaScript code on affected systems, potentially leading to full system compromise, data theft, or further malware deployment. This is a severe supply chain compromise risk.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately remove or replace simplipayng version 1.0.8 from their dependencies. Avoid using this package until a trusted, clean version is released. Monitor dependency sources carefully to prevent inclusion of malicious packages.
Malicious code in simplipayng (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1cf21e1f6c1fc8a9e9caa3a8383da1b2fb4dd863fc531e17771209b14284e087) dist/cjs/index.js appends an eval(atob(...)) blob to what appears to be a React Button re-export. The decoded payload queries public Ethereum RPCs for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, extracts two IPv4 addresses encoded in the tx.to field, then fetches XOR-encoded next-stage JavaScript from those IPs over HTTP/HTTPS at the paths /0x/cls and /0x/ls and executes it via eval and spawn('node', ['-e',...], {detached:true}). Network and process sinks are hidden behind base64 wrapping and per-character \uXXXX unicode escapes for require('http'), require('https'), require('child_process'), and 'spawn'. Any project that require()s this package receives arbitrary remote code execution controlled by whoever writes to the on-chain dead-drop address, in a detached Node subprocess. ## Source: ghsa-malware (b4462e97d828e2448139b0e3f348c00cd4f9f5611b7886c6c199796f5895a5a8) 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 simplipayng npm package version 1.0.8 includes a malicious payload embedded in dist/cjs/index.js. This payload decodes a base64-encoded string that, when executed, queries public Ethereum RPC endpoints for the latest transaction from a hardcoded Ethereum address (0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a). It extracts two IPv4 addresses encoded in the transaction's 'to' field, then fetches XOR-encoded JavaScript from these IPs at specific paths (/0x/cls and /0x/ls). The fetched code is executed via eval and a detached Node.js subprocess using child_process.spawn. The code uses heavy obfuscation techniques, including base64 wrapping and Unicode escapes, to hide network and process operations. This design enables arbitrary remote code execution controlled by whoever can write transactions to the specified Ethereum address, effectively creating a blockchain-based dead-drop for malicious payloads.
Potential Impact
Any software project that includes simplipayng version 1.0.8 as a dependency is vulnerable to arbitrary remote code execution. An attacker controlling the Ethereum address can deliver and execute arbitrary JavaScript code on affected systems, potentially leading to full system compromise, data theft, or further malware deployment. This is a severe supply chain compromise risk.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately remove or replace simplipayng version 1.0.8 from their dependencies. Avoid using this package until a trusted, clean version is released. Monitor dependency sources carefully to prevent inclusion of malicious packages.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12437
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735747bf8831d53915a0b5
Added to database: 08/05/2026, 15:31:19 UTC
Last enriched: 08/05/2026, 17:37:49 UTC
Last updated: 09/15/2026, 01:40:33 UTC
Views: 23
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