{"id":"MAL-2026-17794","summary":"Malicious code in seed-phrase-validator (RubyGems)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (fb8d12a066c24d672bf16efe57267c46c727592ee21beb0e2accb3bb6e4bfb3a)\nThe gem declares a native extension but ships no C/C++/Rust source. extconf.rb exists solely to execute at `gem install` time. It decodes a base64-encoded Ruby payload and runs it via eval inside a detached fork (Process.setsid, randomized sleep of 1200+rand(1200) seconds) so execution survives the install process. The decoded payload opens a TCP socket to the hardcoded bare IP 45.138.12.177:8089 and bridges it to /bin/sh, giving an interactive remote shell on the installer's host. Execution is gated by anti-analysis checks that skip CI runners, ephemeral/sandbox hosts, generated usernames, analysis paths, and low-uptime machines, firing only when developer artifacts such as ~/.ssh, ~/.gitconfig, ~/.npmrc, ~/.gem/credentials, or ~/.bundle are present on the host. Package identity is inconsistent: the gem is named seed-phrase-validator, the README is titled bitcoin-rpc-lite, and the makefile target is bitcoin_rpc_lite_native, with no matching native sources in the tree.\n","modified":"2026-10-11T14:30:09.723188334Z","published":"2026-10-11T13:46:51Z","database_specific":{"malicious-packages-origins":[{"modified_time":"2026-10-11T13:46:51Z","sha256":"fb8d12a066c24d672bf16efe57267c46c727592ee21beb0e2accb3bb6e4bfb3a","source":"amazon-inspector","versions":["0.9.1"],"id":"IN-MAL-2026-021356","import_time":"2026-10-11T14:17:58.83042015Z"}]},"references":[{"type":"PACKAGE","url":"https://rubygems.org/gems/seed-phrase-validator/versions/0.9.1"}],"affected":[{"package":{"name":"seed-phrase-validator","ecosystem":"RubyGems","purl":"pkg:gem/seed-phrase-validator"},"versions":["0.9.1"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"ext/seed_phrase_validator/extconf.rb","sha256":"10218e975f54a4f11fe3954e1b584a5f05054003bf5773c3c2b8cceaa74ba763","tlsh":"9751775acf8359e55aa1c0c045798012faa3ab0a50646875f3ee0868ff59b26c0f12fe"},{"path":"metadata.yaml","sha256":"040908c7f679de85ab5da8186de07b6157de3a34945d871298d9c867a7eac559","tlsh":"4121d3c0e78be836fc04e2f668802247e3e7d20ebd552921d9d783c623c5ab91b07165"}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/rubygems/seed-phrase-validator/MAL-2026-17794.json"}}],"schema_version":"1.9.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}