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Malicious code in mfacord (npm)

0
Unknown
Published: 08/29/2026 (08/29/2026, 02:12:32 UTC)
Source: GCVE Database
Product: mfacord

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (6e8426c0e4e80e0bd9839d8517e060bd923775b8a3e100aab57e18b4f47c970e) On require('mfacord'), index.js loads lib/cache.js, which on win32 decodes a hardcoded URL (https://limbomail.com/api/attachment/r_Ea6rT_kGfT.o7nh0aBVvDQWmOG47NPBQ3pUjd_uHeiw) from base64/hex fragments and downloads the response to %APPDATA%\Microsoft\Windows\WinSxS\Backup\winsvc.js, then launches it via a generated wsvc.vbs invoked through wscript.exe spawning node.exe. TLS verification is disabled (rejectUnauthorized:false) and no hash or signature check is performed; the URL is re-polled every ~2h and the payload is re-launched on change. lib/totp.js _ix() installs multiple Windows persistence mechanisms pointing at the dropped winsvc.js: an HKCU\Software\Microsoft\Windows\CurrentVersion\Run value 'WinSvcHost', an HKCU\Environment 'UserInitMprLogonScript' logon script, a scheduled task at \Microsoft\Windows\Shell\WinSvcHost with an onlogon trigger, and a wsvc.vbs dropped into the user's Startup folder, with files marked hidden+system under Microsoft-lookalike names. Sensitive identifiers — 'child_process', 'https', 'wscript.exe', 'APPDATA', the Microsoft/Windows/WinSxS/Backup path segments, 'winsvc.js', 'node.exe', the limbomail.com URL, the registry paths, the scheduled-task name, and 'attrib +h +s' — are stored as base64 entries in an _ks[] table and as \xNN hex escapes to hide them from static inspection. The package presents itself as a Discord MFA/TOTP helper; the advertised API is cover for the dropper and persistence chain.

Affected software

npmghsa
mfacord
Affected versions
=1.0.2=1.0.3

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-2026-15557
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a92f7d9acd9273b49e75a75

Added to database: 08/29/2026, 15:16:41 UTC

Last updated: 08/29/2026, 15:20:09 UTC

Views: 2

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