Malicious Process Detection: User Defined Malware Running (Linux)

critical Nessus Plugin ID 91223


Nessus detected potentially unwanted processes on the remote host.


The hash of one or more running processes on the remote Linux host matches one of the signatures provided using the 'Provide your own list of known bad hashes' preference (found under the 'Hash and Whitelist Files' section) in the scan policy.

Verify that the remote processes are legitimate and authorized in your environment.


Uninstall the remote software if it does not match your security policy, and investigate your network for further signs of a breach.

Plugin Details

Severity: Critical

ID: 91223

File Name: linux_user_md5s.nbin

Version: 1.56

Type: local

Agent: unix

Family: Backdoors

Published: 5/18/2016

Updated: 9/25/2023

Supported Sensors: Nessus Agent

Risk Information


Risk Factor: Critical

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C


Risk Factor: Critical

Base Score: 10

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Vulnerability Information

Required KB Items: malware/linux/custom