SigmaHQ/rules/windows/process_creation/win_hh_chm.yml

title: HH.exe Execution
id: 68c8acb4-1b60-4890-8e82-3ddf7a6dba84
description: Identifies usage of hh.exe executing recently modified .chm files.
status: experimental
author: E.M. Anhaus (orignally from Atomic Blue Detections, Dan Beavin), oscd.community
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1223/T1223.yaml
    - https://eqllib.readthedocs.io/en/latest/analytics/b25aa548-7937-11e9-8f5c-d46d6d62a49e.html
date: 2019/10/24
modified: 2019/11/11
tags:
    - attack.defense_evasion
    - attack.execution
    - attack.t1223
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\hh.exe'
        CommandLine|contains: '.chm'
    condition: selection
fields:
    - ComputerName
    - User
    - CommandLine
falsepositives:
    - unlike
level: high
Rule fixes Made tests pass the new CI tests. Added further allowed lower case words in rule test. 2020-02-20 22:00:16 +00:00			`title: HH.exe Execution`
UUIDs + moved unsupported logic * Added UUIDs to all contributed rules * Moved unsupported logic directory out of rules/ because this breaks CI testing. 2019-12-19 22:56:36 +00:00			`id: 68c8acb4-1b60-4890-8e82-3ddf7a6dba84`
Added Atomic Blue Detections Repo 2019-10-28 10:59:49 +00:00			`description: Identifies usage of hh.exe executing recently modified .chm files.`
			`status: experimental`
Update win_hh_chm.yml 2019-11-11 00:04:54 +00:00			`author: E.M. Anhaus (orignally from Atomic Blue Detections, Dan Beavin), oscd.community`
			`references:`
			`- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1223/T1223.yaml`
			`- https://eqllib.readthedocs.io/en/latest/analytics/b25aa548-7937-11e9-8f5c-d46d6d62a49e.html`
Added Atomic Blue Detections Repo 2019-10-28 10:59:49 +00:00			`date: 2019/10/24`
Update win_hh_chm.yml 2019-11-11 00:04:54 +00:00			`modified: 2019/11/11`
Added Atomic Blue Detections Repo 2019-10-28 10:59:49 +00:00			`tags:`
			`- attack.defense_evasion`
			`- attack.execution`
			`- attack.t1223`
OSCD QA wave 3 2020-01-19 21:34:16 +00:00			`logsource:`
			`category: process_creation`
			`product: windows`
Added Atomic Blue Detections Repo 2019-10-28 10:59:49 +00:00			`detection:`
			`selection:`
Update win_hh_chm.yml 2019-11-11 00:04:54 +00:00			`Image\|endswith: '\hh.exe'`
			`CommandLine\|contains: '.chm'`
Added Atomic Blue Detections Repo 2019-10-28 10:59:49 +00:00			`condition: selection`
OSCD QA wave 1 * Checked all rules against Mordor and EVTX samples datasets * Added field names * Some severity adjustments * Fixes 2020-01-10 23:11:27 +00:00			`fields:`
			`- ComputerName`
			`- User`
			`- CommandLine`
Added Atomic Blue Detections Repo 2019-10-28 10:59:49 +00:00			`falsepositives:`
			`- unlike`
			`level: high`