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Malicious code in parallely (npm)

0
Unknown
Published: 07/28/2026 (07/28/2026, 13:33:43 UTC)
Source: GCVE Database
Product: parallely

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (2a862cdceb2998828aba8de0d4a672b86a2c22dff073356e5acd89e894aced56) The npm package name `parallely` typosquats `concurrently`: package.json advertises the concurrently repository, author, and funding while shipping different code. On library load, an IIFE inside `resolveShell` in dist/lib/spawn.js reconstructs a hidden download URL at runtime by AES-256-GCM decrypting a hardcoded ciphertext (key XOR'd from four base64 constants; IV and auth tag hardcoded), then downloads a platform-specific payload (linux/mac binary or win.js) into os.tmpdir()/ins-<euid>/, sha256-verifies it against a fetched `.meta`, chmods it executable, strips the macOS quarantine attribute via `xattr -c`, and spawns it detached and unref'd. The same block installs anti-analysis guards: it silences uncaughtException/warning handlers, reads /proc/self/status to check `TracerPid`, calls inspector.url(), and scans env/argv for `--inspect`/`--debug`, short-circuiting if any debugger signal is present. A self-relaunch guarded by environment-variable tags is used to survive being imported versus exec'd. The C2 host is not present in plaintext; it is reconstructed only at runtime specifically to defeat static inspection.

Affected software

npmghsa
parallely
Affected versions
=10.0.3=10.0.4

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-11143
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a735741bf8831d539156183

Added to database: 08/05/2026, 15:31:13 UTC

Last updated: 08/05/2026, 15:31:13 UTC

Views: 1

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