Linux Malicious File Detection: User Defined Malware

critical Nessus Plugin ID 126259
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

Nessus detected potentially unwanted files on the remote host.

Description

The checksum of one or more files 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.

Note that Nessus has only scanned Linux executable binaries and libraries.

Solution

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: 126259

File Name: linux_malware_user_filescan.nbin

Version: 1.11

Type: local

Agent: unix

Family: Backdoors

Published: 6/26/2019

Updated: 7/12/2021

Dependencies: linux_malware_scan_filescan.nbin

Risk Information

CVSS Score Source: manual

CVSS Score Rationale: The detection is suspected as being malware.

CVSS v2

Risk Factor: Critical

Base Score: 10

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

CVSS v3

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