From f7bb6e308d83ca4983f8c47bc00d405bb6f015f8 Mon Sep 17 00:00:00 2001 From: mhaag-spl <5632822+MHaggis@users.noreply.github.com> Date: Wed, 11 Aug 2021 20:32:46 -0600 Subject: [PATCH] Added detection testing service results inDetect HTML Help Renamed --- .../endpoint/detect_html_help_renamed.yml | 26 ++++++++++--------- 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/detections/endpoint/detect_html_help_renamed.yml b/detections/endpoint/detect_html_help_renamed.yml index 9864d74ac2..4e4b474520 100644 --- a/detections/endpoint/detect_html_help_renamed.yml +++ b/detections/endpoint/detect_html_help_renamed.yml @@ -5,7 +5,7 @@ date: '2021-02-11' author: Michael Haag, Splunk type: batch datamodel: - - Endpoint +- Endpoint description: The following analytic identifies a renamed instance of hh.exe (HTML Help) executing a Compiled HTML Help (CHM). This particular technique will load Windows script code from a compiled help file. CHM files may contain nearly any @@ -21,12 +21,13 @@ search: '| tstats `security_content_summariesonly` count min(_time) as firstTime as lastTime from datamodel=Endpoint.Processes where (Processes.original_file_name=HH.exe AND Processes.process_name!=hh.exe) by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id - Processes.original_file_name - | `drop_dm_object_name(Processes)` - | `security_content_ctime(firstTime)` - | `security_content_ctime(lastTime)` - | `detect_html_help_renamed_filter`' -how_to_implement: To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product. + Processes.original_file_name | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` + | `security_content_ctime(lastTime)` | `detect_html_help_renamed_filter`' +how_to_implement: To successfully implement this search you need to be ingesting information + on process that include the name of the process responsible for the changes from + your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition, + confirm the latest CIM App 4.20 or higher is installed and the latest TA for the + endpoint product. known_false_positives: Although unlikely a renamed instance of hh.exe will be used legitimately, filter as needed. references: @@ -49,7 +50,8 @@ tags: impact: 80 kill_chain_phases: - Actions on Objectives - message: The following $process_name$ has been identified as renamed, spawning from $parent_process_name$. + message: The following $process_name$ has been identified as renamed, spawning from + $parent_process_name$. mitre_attack_id: - T1218.001 nist: @@ -80,11 +82,11 @@ tags: - _time - Processes.dest - Processes.user - - Processes.parent_process_name #parent process name - - Processes.parent_process #parent cmdline + - Processes.parent_process_name + - Processes.parent_process - Processes.original_file_name - - Processes.process_name #process name - - Processes.process #process cmdline + - Processes.process_name + - Processes.process - Processes.process_id - Processes.parent_process_path - Processes.process_path