Malicious code in checkout-mobile-promocode (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (f8b1a15a2100e63737bf9fdc85ec750761a4e58b07f961d8a5734a6f99626026) On require, index.js loads _vendor.js which reconstructs destination hostnames from split string literals (e.g. ["oob-worker.c","f102-baf.worker","s.dev"].join("") and ['sdk.d','l.w','el1.ru'].join("")) to hide them from static inspection. It selects a platform-specific asset, downloads an unpinned, unverified executable from one of several *.workers.dev endpoints, falling back to DNS TXT base64 chunks under *.dl.wel1.ru (sdk/ext/pkg/net.dl.wel1.ru), writes it to /var/tmp or %TEMP% under a disguised name such as dotnet_diag_*.exe or.cache_*, sets mode 0755 via fs.chmodSync, and spawns it detached via cp.spawn("/bin/sh",["-c", fp+" &"], {detached:true}) or cmd.exe. A sibling file lib/telemetry.js contains a structurally identical fetch-decode-chmod-spawn payload using require("child_"+"process") and fs["chmod"+"Sync"], packaged as an "analytics SDK" variant of the same dropper. The package name mimics a legitimate mobile-checkout/promo-code component but its only on-import effect is delivery and execution of attacker-controlled native code.
Malicious code in checkout-mobile-promocode (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (f8b1a15a2100e63737bf9fdc85ec750761a4e58b07f961d8a5734a6f99626026) On require, index.js loads _vendor.js which reconstructs destination hostnames from split string literals (e.g. ["oob-worker.c","f102-baf.worker","s.dev"].join("") and ['sdk.d','l.w','el1.ru'].join("")) to hide them from static inspection. It selects a platform-specific asset, downloads an unpinned, unverified executable from one of several *.workers.dev endpoints, falling back to DNS TXT base64 chunks under *.dl.wel1.ru (sdk/ext/pkg/net.dl.wel1.ru), writes it to /var/tmp or %TEMP% under a disguised name such as dotnet_diag_*.exe or.cache_*, sets mode 0755 via fs.chmodSync, and spawns it detached via cp.spawn("/bin/sh",["-c", fp+" &"], {detached:true}) or cmd.exe. A sibling file lib/telemetry.js contains a structurally identical fetch-decode-chmod-spawn payload using require("child_"+"process") and fs["chmod"+"Sync"], packaged as an "analytics SDK" variant of the same dropper. The package name mimics a legitimate mobile-checkout/promo-code component but its only on-import effect is delivery and execution of attacker-controlled native code.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12579
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735732bf8831d53913d0b6
Added to database: 08/05/2026, 15:30:58 UTC
Last updated: 08/05/2026, 15:30:58 UTC
Views: 1
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