{"id":"MAL-2026-17927","title":"Malicious code in fabtoolkit (PyPI)","summary":"Malicious code in fabtoolkit (PyPI)","severity":"critical","exploited":true,"vendor":"fabtoolkit","product":"fabtoolkit","ecosystem":"pip","affected":["fabtoolkit"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T02:30:03.430743589Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2026-17927","references":[{"url":"https://pypi.org/project/fabtoolkit/0.1.2/"},{"url":"https://pypi.org/project/fabtoolkit/0.1.1/"},{"url":"https://pypi.org/project/fabtoolkit/0.1.0/"}],"tags":["osv","pip","malware"],"ingestedAt":"2026-10-19T11:52:05.984Z","slug":"MAL-2026-17927","body":"## Overview\n\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (e55333b9d934a04c029943e0e6fbf34fff7c1344e0d1964b6860bc02d322855d)\nfabtoolkit executes a payload (embedded as a CHILD string run via `subprocess.run([sys.executable,'-I','-c',CHILD],...)`) that fetches a JSON config from https://transfer.archivete.am/H2Uxm/fabdeploycheck-config.json with TLS verification disabled (`ssl._create_unverified_context()`) and dispatches on config-supplied `kind` values: `file` reads arbitrary filesystem paths, `run` executes attacker-supplied argv via subprocess, `http` issues attacker-chosen requests with Bearer tokens chained from previously-read files, `tcp` probes ports, and `revsh` forks a daemon that polls `base+'/'+ident+'-cmd.txt'` and pipes the returned bytes into `/bin/sh -c`, PUTting stdout/stderr back to the same host. Collected file contents, command output, HTTP responses, and probe results are packed into an in-memory zip and PUT to transfer.archivete.am under an attacker-chosen report name. Before daemonizing, the payload walks `/proc/*/cmdline` and SIGKILLs processes whose cmdlines contain `FABDRV3`, `fabdrv2`, or `connection ready`, enforcing single-instance persistence and clearing prior variants. The entry points `python -m fabtoolkit` and any import path reaching `selftest()`/`check()` trigger the payload. The destination is an anonymous public file-transfer host; config-controlled file reads enable harvesting of credentials such as `~/.aws/credentials` and `~/.ssh/*` along with cloud metadata via the `http` kind. The package has no legitimate functionality matching its naming.\n\n\n## Affected packages\n\n- `fabtoolkit`\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":[]}