This has apparently been a thing since at least 16.04
Install a clean version of Ubuntu, install chkrootkit, run a check.
tcpd will report as infected.
ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: chkrootkit 0.52-1 ProcVersionSignature: Ubuntu 4.15.0-42.45-lowlatency 4.15.18 Uname: Linux 4.15.0-42-lowlatency x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 CurrentDesktop: MATE Date: Mon Dec 17 18:30:29 2018 InstallationDate: Installed on 2018-12-05 (12 days ago) InstallationMedia: Ubuntu-MATE 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: chkrootkit UpgradeStatus: No upgrade log present (probably fresh install)
This has apparently been a thing since at least 16.04
Install a clean version of Ubuntu, install chkrootkit, run a check.
tcpd will report as infected.
ProblemType: Bug ature: Ubuntu 4.15.0- 42.45-lowlatenc y 4.15.18 42-lowlatency x86_64 dules: nvidia_modeset nvidia
DistroRelease: Ubuntu 18.04
Package: chkrootkit 0.52-1
ProcVersionSign
Uname: Linux 4.15.0-
NonfreeKernelMo
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: MATE
Date: Mon Dec 17 18:30:29 2018
InstallationDate: Installed on 2018-12-05 (12 days ago)
InstallationMedia: Ubuntu-MATE 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: chkrootkit
UpgradeStatus: No upgrade log present (probably fresh install)