Bash Shell Profile Modification
Elastic Stack Serverless Security
Both ~/.bash_profile and ~/.bashrc are files containing shell commands that are run when Bash is invoked. These files are executed in a user’s context, either interactively or non-interactively, when a user logs in so that their environment is set correctly. Adversaries may abuse this to establish persistence by executing malicious content triggered by a user’s shell.
Rule type: query
Rule indices:
- logs-endpoint.events.*
- auditbeat-*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- macOS
- Linux
- Threat Detection
- Persistence
Version: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
event.category:file and event.type:change and
process.name:(* and not (sudo or
vim or
zsh or
env or
nano or
bash or
Terminal or
xpcproxy or
login or
cat or
cp or
launchctl or
java)) and
not process.executable:(/Applications/* or /private/var/folders/* or /usr/local/*) and
file.path:(/private/etc/rc.local or
/etc/rc.local or
/home/*/.profile or
/home/*/.profile1 or
/home/*/.bash_profile or
/home/*/.bash_profile1 or
/home/*/.bashrc or
/Users/*/.bash_profile or
/Users/*/.zshenv)
Framework: MITRE ATT&CKTM
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Event Triggered Execution
- ID: T1546
- Reference URL: https://attack.mitre.org/techniques/T1546/
Sub-technique:
- Name: Unix Shell Configuration Modification
- ID: T1546.004
- Reference URL: https://attack.mitre.org/techniques/T1546/004/