VYPR

gem · Malicious package advisory

Malware

zzhelloworld_socktest

MAL-2026-18126

Malicious code in zzhelloworld_socktest (RubyGems)

Details


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## Source: amazon-inspector (4344ab16d08a7e38ea2f32b406453f86d792c0fa17103125ad84ffd0e39c187f)
On `require "zzhelloworld_socktest"`, the library's top-level module body opens a TCP connection to the hardcoded remote endpoint 66.78.40.218:32768, reopens STDIN, STDOUT, and STDERR onto that socket, and execs `/bin/sh -i`. Loading the gem gives the operator of that remote host an interactive shell on the installing machine, with no authentication and full process privileges. The gem's stated purpose is a trivial test library, which does not match a remote-shell capability. The destination is a bare IPv4 address unrelated to any declared publisher infrastructure.

Compromised versions (7)

  • 0.1.9
  • 0.1.5
  • 0.1.6
  • 0.2.0
  • 0.1.7
  • 0.2.1
  • 0.1.8

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.