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Malicious code in pfp-block-mobile-vacancy-description (npm)

0
Critical
Published: 08/05/2026 (08/05/2026, 12:50:00 UTC)
Source: GCVE Database
Product: pfp-block-mobile-vacancy-description

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (29681869c5fcf5be10eebd7b614f602f3232d1f4645b028d817436b5dfabeae5) On require() of the package, index.js loads _loader.js which unconditionally executes init(). init() selects an OS-specific payload path, downloads an opaque binary via HTTPS from author-controlled Cloudflare Workers hosts (oob-worker.cf10x-*.workers.dev) with a base64-over-DNS-TXT fallback under *.dl.well1.site, writes the bytes to a disguised temp file (dotnet_diag_<hex>.exe on Windows or.cache_<hex> under /var/tmp), chmods 0755, and spawns it detached via spawn("/bin/sh") / spawn("cmd"). Destination hostnames are assembled at runtime from small string fragments joined with Array.join to defeat naive string scans. A cache-lock file at /tmp/.analytics_state (or %TEMP%\analytics_state) with a ~6-hour TTL rate-limits re-execution across imports, and DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env-var checks serve as a telemetry cover story while the actual behavior is remote-binary drop-and-execute. The fetched bytes are attacker-controlled and unpinned (no hash, no signature, no vendor-matching publisher domain), so any consumer that requires this package runs whatever the operators serve at the moment of install/import. ## Source: ghsa-malware (aa6d80458d94fbe93b9d1ff8ae43781e1b07bd33ba06cf0c8269fcc79500d839) 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

npmghsa
pfp-block-mobile-vacancy-description
Affected versions
=20.4.1

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/05/2026, 17:23:59 UTC

Technical Analysis

The pfp-block-mobile-vacancy-description npm package version 20.4.1 contains malicious code that triggers on require(). It loads a loader script that downloads an opaque binary payload from attacker-controlled Cloudflare Workers domains and a DNS TXT record fallback. The binary is saved to a disguised temporary file with executable permissions and spawned detached via shell commands. The payload hostnames are dynamically assembled to evade string scanning. A cache-lock file limits execution frequency, and environment variables are checked to provide a false telemetry cover story. The downloaded payload is unpinned with no hash or signature verification, allowing arbitrary code execution controlled by the attacker at the time of import or install.

Potential Impact

Any system that installs or imports version 20.4.1 of this package will execute arbitrary attacker-controlled code with the privileges of the importing process. This can lead to full system compromise, data theft, persistence, or further malicious activity. The lack of integrity checks on the downloaded payload means the attacker can change the payload at any time without detection.

Mitigation Recommendations

No official patch or remediation is currently documented. Users should immediately remove and avoid using version 20.4.1 of the pfp-block-mobile-vacancy-description package. Audit dependencies for this package and replace it with a trusted alternative. Monitor for any unexpected network activity or execution of unknown binaries related to this package. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for updates.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-12411
Osv Schema Version
1.7.4
Ecosystems
["npm"]

Threat ID: 6a735745bf8831d539159efb

Added to database: 08/05/2026, 15:31:17 UTC

Last enriched: 08/05/2026, 17:23:59 UTC

Last updated: 09/10/2026, 00:28:22 UTC

Views: 17

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