🛡️ MAL-2026-13228 — bigops-offers

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in bigops-offers (npm)

Source: amazon-inspector

[email protected] executes a binary dropper at require time. index.js loads./_init on import; _init.js assembles C2 hostnames from split string arrays (workers.dev subdomains oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) and fetches a platform-specific binary via https.get. A DNS TXT-record fallback assembles base64 payload chunks from c.dl.wel1.ru and 0..N.dl.wel1.ru (sdk/ext/pkg/net subdomains). The retrieved bytes are written to a disguised path (dotnet_diag_<rand>.exe on Windows,.cache_<rand> on Unix), chmod 0o755, and spawned detached via /bin/sh or cmd. A.analytics_state lock file and DISABLE_TELEMETRY/DO_NOT_TRACK env checks provide a telemetry cover story. Destinations, filenames, and delivery channels are string-split to evade static detection.

Affected software

MAL-2026-13228 is recorded against 1 package.

  • bigops-offers

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
bigops-offers — —

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