supply chain event / NVI-00009842 / Revision 1
Malicious code in hdkey-derive-helper (RubyGems)
GitHub lists this malware advisory for hdkey-derive-helper. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
hdkey-derive-helper
source listed= 1.0.0
## Source: amazon-inspector (04f5409730ece37713b6a8d3afddcce30744e213b80759f7ae89478731b0264a) The gem presents itself as a BIP32/mnemonic derivation helper but ships only a wordlist stub and a 56-byte empty C file (ext/hdkey-derive-helper/hdkey-derive-helper.c, body `void Init_HdkeyDeriveHelper(void) {}`) registered as a native extension. Because RubyGems auto-executes `extconf.rb` during `gem install`, the extension exists solely as an execution vehicle. extconf.rb contains no build logic; it base64-decodes a Ruby payload, reconstructs a destination URL by XOR-decoding a hex blob with a 4-byte key, and in a detached `fork` downloads a tarball with curl, extracts it to /tmp/.w1, and runs `bash wg_install.sh` on the extracted contents. The reconstructed destination is http://45.138.127.89:8092/wgkit.tar.gz — a bare-IP endpoint over plain HTTP, unrelated to any publisher. Execution is gated by anti-analysis checks that refuse to run under CI environment variables, ephemeral/sandbox hostnames, generated usernames matching patterns such as uA\d+/sandbox/tester/analys/scanner, temp or analysis cwd paths, or machine uptime under 30 minutes, and that require developer artifacts (~/.ssh,
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-q82p-2pwq-fvp4 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.