fabtoolkit

Source: amazon-inspector (e55333b9d934a04c029943e0e6fbf34fff7c1344e0d1964b6860bc02d322855d)
fabtoolkit 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.

Source: kam193 (2bf19474223c7d4ca639f13835ca22395443b92a5418d226733dfe81b3a25d5e)
Package hides code that starts malicious actions: it downloads a C2 configuration and executes commands from it. It supports exfiltrating files, running commands, and starting a reverse shell.

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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-11-fabtoolkit

Reasons (based on the campaign):

- The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.

- exfiltration-generic

- The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

- The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.