macs-shoaibs-pro17RubyGems
Advisory published Updated
macs-shoaibs-pro17 is a confirmed malicious RubyGems package (MAL-2026-18436) that executes malicious code on install (malicious version 90002.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in macs-shoaibs-pro17 (RubyGems)
What this malware does
The gem declares ext/mkrf_conf.rb as a native extension, which RubyGems auto-executes during gem install. The script contains no mkmf/rake build logic (no create_makefile, have_header, or compiler invocation). Instead it reads /etc/passwd, /etc/hosts, /etc/resolv.conf, the hostname, the current user, and the working directory, opens a TLS connection via TCPSocket to d5jjaycuhgtrskqh1n53qo70ur0kobc0.oastify.com:443 (a Burp Collaborator subdomain), and POSTs the collected data to that host before writing a.installed marker. The gemspec summary ("A simple gem for demonstration purposes") does not correspond to any functionality present in the package.
The OpenSSF Package Analysis project identified 'macs-shoaibs-pro17' @ 90002.1 (rubygems) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for macs-shoaibs-pro17 (version 90002.1).
If you installed it — respond
Remove macs-shoaibs-pro17 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If macs-shoaibs-pro17 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks macs-shoaibs-pro17-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.