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Vulnerabilities

Vulnerability · MAL-2026-17800

Malicious code in wallet-hd-derive (RubyGems)

Published Oct 11, 2026 · catalog updated Oct 13, 2026 · Malicious code in wallet-hd-derive

Open the advisory

Exploitation likelihood is not on this record for MAL-2026-17800. A missing EPSS score is not a low risk. Compare Malicious code in wallet-hd-derive with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Malicious code in wallet-hd-derive).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
RubyGems wallet-hd-derive

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (fdfb31a6866dee961d55ad503da9de33a2cf743b52c80862e4380519ad5bef12) The gem is published as a crypto wallet utility but ships no native source; its gemspec declares extconf.rb as an extension so that auto-executes it. extconf.rb decodes a base64-encoded Ruby payload and, after checking for sandbox and analysis signals (CI env, ephemeral hostnames, generated usernames matching patterns such as /sandbox/tester/analys/scanner, cwd under /tmp, /opt/rubygems, /workspace, low machine uptime) and confirming developer-identifying files ( , , etc.), double-forks a detached process via fork + Process.setsid, sleeps for 20–40 minutes, then opens a TCP connection to 45.138.12.177:8089 and pipes /bin/sh in both directions using TCPSocket and IO.popen/IO.copy_stream. The shipped library at lib/wallet_hd_derive.rb exposes only two no-op methods ( , ) and the README is branded for an unrelated package ( ), confirming the gem exists solely as a delivery vehicle for the install-time backdoor. The destination IP, base64 encoding of the payload, sandbox-evasion gating, and delayed reverse-shell establishment give a remote operator interactive /bin/sh on any developer or CI host that installs the gem. ## Source: ossf-package-analysis (4630595f8934769aa5dc9e63f62e4552e3cb3663dc5f03e5def0deeb3a8476e1) The OpenSSF Package Analysis project identified 'wallet-hd-derive' @ 0.9.1 (rubygems) as malicious. It is considered malicious because: - The package executes one or more commands associated with malicious behavior.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • RubyGems wallet-hd-derive0.9.1

How to fix MAL-2026-17800

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for MAL-2026-17800. A missing EPSS score is not a low risk. Compare Malicious code in wallet-hd-derive with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0.9.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 11, 2026 · Catalog

    Detected

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (fdfb31a6866dee961d55ad503da9de33a2cf743b52c80862e4380519ad5bef12) The gem is published as a crypto wallet utility but ships no native source; its gemspec declares extconf.rb as an extension so that auto-executes it. extconf.rb decodes a base64-encoded Ruby payload and, after checking for sandbox and analysis s

  2. Oct 13, 2026 · Catalog

    Updated

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (fdfb31a6866dee961d55ad503da9de33a2cf743b52c80862e4380519ad5bef12) The gem is published as a crypto wallet utility but ships no native source; its gemspec declares extconf.rb as an extension so that auto-executes it. extconf.rb decodes a base64-encoded Ruby payload and, after checking for sandbox and analysis s

Sources

References

Freshness

Last verified in this catalog Oct 13, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.