Pluggable Authentication Module (PAM) Source Download
editPluggable Authentication Module (PAM) Source Download
editThis rule detects the usage of curl or wget to download the source code of a Pluggable Authentication Module (PAM) shared object file. Attackers may download the source code of a PAM shared object file to create a backdoor in the authentication process.
Rule type: eql
Rule indices:
- logs-endpoint.events.process*
- endgame-*
Severity: low
Risk score: 21
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Domain: Endpoint
- OS: Linux
- Use Case: Threat Detection
- Tactic: Credential Access
- Tactic: Persistence
- Data Source: Elastic Defend
- Data Source: Elastic Endgame
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editprocess where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and
process.name in ("curl", "wget") and
process.args like~ "https://github.com/linux-pam/linux-pam/releases/download/v*/Linux-PAM-*.tar.xz"
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
-
Technique:
- Name: Create or Modify System Process
- ID: T1543
- Reference URL: https://attack.mitre.org/techniques/T1543/
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: Modify Authentication Process
- ID: T1556
- Reference URL: https://attack.mitre.org/techniques/T1556/