Guacamole Two Users Sharing Session Anomaly

Status: test
Severity: high
Log source: product linux, service guacamole
Author: Florian Roth (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects suspicious session with two users present

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1212` Exploitation for Credential Access

Rule body

title: Guacamole Two Users Sharing Session Anomaly
id: 1edd77db-0669-4fef-9598-165bda82826d
status: test
description: Detects suspicious session with two users present
references:
    - https://research.checkpoint.com/2020/apache-guacamole-rce/
author: Florian Roth (Nextron Systems)
date: 2020-07-03
modified: 2021-11-27
tags:
    - attack.credential-access
    - attack.t1212
logsource:
    product: linux
    service: guacamole
detection:
    selection:
        - '(2 users now present)'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    - '(2 users now present)'

Guacamole Two Users Sharing Session Anomaly

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Stage 0: `condition`

Stage 1: `selection`