SigmaHQ/rules/windows/process_creation/win_susp_whoami.yml

title: Whoami Execution
status: experimental
description: Detects the execution of whoami, which is often used by attackers after exloitation / privilege escalation but rarely used by administrators
references:
    - https://brica.de/alerts/alert/public/1247926/agent-tesla-keylogger-delivered-inside-a-power-iso-daa-archive/
    - https://app.any.run/tasks/7eaba74e-c1ea-400f-9c17-5e30eee89906/
author: Florian Roth
date: 2018/08/13
tags:
    - attack.discovery
    - attack.t1033
    - car.2016-03-001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image: '*\whoami.exe'
    selection2:
        OriginalFileName: 'whoami.exe'
    condition: selection or selection2
falsepositives:
    - Admin activity
    - Scripts and administrative tools used in the monitored environment
level: high
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`title: Whoami Execution`
			`status: experimental`
			`description: Detects the execution of whoami, which is often used by attackers after exloitation / privilege escalation but rarely used by administrators`
			`references:`
docs: minor changes 2019-08-22 12:22:45 +00:00			`- https://brica.de/alerts/alert/public/1247926/agent-tesla-keylogger-delivered-inside-a-power-iso-daa-archive/`
			`- https://app.any.run/tasks/7eaba74e-c1ea-400f-9c17-5e30eee89906/`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`author: Florian Roth`
docs: minor changes 2019-08-22 12:22:45 +00:00			`date: 2018/08/13`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`tags:`
Increased indentation to 4 * Converted (to generic sigma) rules * Converter outputs by default with indentation 4 2019-03-01 23:14:20 +00:00			`- attack.discovery`
			`- attack.t1033`
First Pass 2019-06-14 04:15:38 +00:00			`- car.2016-03-001`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`logsource:`
Increased indentation to 4 * Converted (to generic sigma) rules * Converter outputs by default with indentation 4 2019-03-01 23:14:20 +00:00			`category: process_creation`
			`product: windows`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`detection:`
Increased indentation to 4 * Converted (to generic sigma) rules * Converter outputs by default with indentation 4 2019-03-01 23:14:20 +00:00			`selection:`
add/modify powershell Empire rules 2019-09-02 09:04:44 +00:00			`Image: '*\whoami.exe'`
			`selection2:`
			`OriginalFileName: 'whoami.exe'`
			`condition: selection or selection2`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`falsepositives:`
Increased indentation to 4 * Converted (to generic sigma) rules * Converter outputs by default with indentation 4 2019-03-01 23:14:20 +00:00			`- Admin activity`
			`- Scripts and administrative tools used in the monitored environment`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 22:36:31 +00:00			`level: high`