Findings

MAL-2026-17793

Malicious code in perp-funding-rates (RubyGems)

Published Oct 11, 2026 · updated Oct 13, 2026

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (123418539e0264e9d58c8b51976723aff3eceec10520c231d7bc847edd51d691) The gem's native-extension script ext/perp_funding_rates/extconf.rb contains no real build logic: it declares create_makefile('bitcoin_rpc_lite_native') but ships no C/C++/Rust sources, and the gemspec/library name (perp-funding-rates / PerpFundingRates) does not match the README (bitcoin-rpc-lite) — the extension exists solely to execute code at install time. During , extconf.rb base64-decodes a Ruby payload and eval()s it inside a double-forked, detached, delayed child process. The decoded payload opens a TCP socket to the hardcoded bare-IP C2 at 45.138.12.177:8089 and bridges it to /bin/sh, giving the operator an interactive shell on the installer's machine. Execution is gated by sandbox/CI/user/path/uptime heuristics and only triggers when developer-signal files such as ~/.ssh, ~/.gem/credentials, ~/.gitconfig, ~/.npmrc, or ~/.bundle are present on the host, targeting developer workstations and build systems. The base64+eval obfuscation, 20-40 minute sleep before dial-out, double-fork detachment, and cloned-identity cover story are consistent with a targeted developer-compromise dropper, not a legitimate native build. ## Source: ossf-package-analysis (0ce92e6f21307b92f509ec9ac926330b908f989a4fef9078a51f3557790c8167) The OpenSSF Package Analysis project identified 'perp-funding-rates' @ 0.9.1 (rubygems) as malicious. It is considered malicious because: - The package executes one or more commands associated with malicious behavior.