IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
UID Elevation from Previously Unknown Executable
editUID Elevation from Previously Unknown Executable
editMonitors for the elevation of regular user permissions to root permissions through a previously unknown executable. Attackers may attempt to evade detection by hijacking the execution flow and hooking certain functions/syscalls through a rootkit in order to provide easy access to root via a special modified command.
Rule type: new_terms
Rule indices:
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Linux
- Use Case: Threat Detection
- Tactic: Privilege Escalation
- Tactic: Defense Evasion
- Data Source: Elastic Defend
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
edithost.os.type:"linux" and event.category:"process" and event.action:"uid_change" and event.type:"change" and user.id:"0" and process.parent.name:("bash" or "dash" or "sh" or "tcsh" or "csh" or "zsh" or "ksh" or "fish") and not ( process.executable:( /bin/* or /usr/bin/* or /sbin/* or /usr/sbin/* or /snap/* or /tmp/newroot/* or /var/lib/docker/* or /usr/local/* ) or process.name:( "bash" or "dash" or "sh" or "tcsh" or "csh" or "zsh" or "ksh" or "fish" or "sudo" or "su" or "apt" or "apt-get" or "aptitude" or "squid" or "snap" or "fusermount" or "pkexec" or "umount" ) or process.args:/usr/bin/python* )
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Hijack Execution Flow
- ID: T1574
- Reference URL: https://attack.mitre.org/techniques/T1574/
-
Sub-technique:
- Name: KernelCallbackTable
- ID: T1574.013
- Reference URL: https://attack.mitre.org/techniques/T1574/013/
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Rootkit
- ID: T1014
- Reference URL: https://attack.mitre.org/techniques/T1014/