From 705782ee9b41929028a6b3343a34a6f6fd0bb940 Mon Sep 17 00:00:00 2001
From: Tim Shelton <tshelton@hawkdefense.com>
Date: Tue, 3 Jan 2023 20:52:10 +0000
Subject: [PATCH 1/2] FP: call of window style hidden is embedded in AWS code.

---
 .../powershell_script/posh_ps_susp_windowstyle.yml        | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml b/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
index ea8c32176..2c9159a8f 100644
--- a/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
+++ b/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
@@ -6,9 +6,9 @@ description: |
     In some cases, windows that would typically be displayed when an application carries out an operation can be hidden
 references:
     - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1564.003/T1564.003.md
-author: frack113
+author: frack113, Tim Shelton (fp AWS)
 date: 2021/10/20
-modified: 2022/12/25
+modified: 2023/01/03
 tags:
     - attack.defense_evasion
     - attack.t1564.003
@@ -22,7 +22,9 @@ detection:
             - 'powershell'
             - 'WindowStyle'
             - 'Hidden'
-    condition: selection
+    filter:
+        ScriptBlockText|contains: ':\Program Files\Amazon\WorkSpacesConfig\Scripts\'
+    condition: selection and not filter
 falsepositives:
     - Unknown
 level: medium

From 4d6aec82a65c98b780c7ddc4a7bc2c7384a6d906 Mon Sep 17 00:00:00 2001
From: Nasreddine Bencherchali <8741929+nasbench@users.noreply.github.com>
Date: Wed, 4 Jan 2023 00:43:40 +0100
Subject: [PATCH 2/2] fix: enhance fp filter

---
 .../powershell/powershell_script/posh_ps_susp_windowstyle.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml b/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
index 2c9159a8f..c4c13d575 100644
--- a/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
+++ b/rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
@@ -23,7 +23,9 @@ detection:
             - 'WindowStyle'
             - 'Hidden'
     filter:
-        ScriptBlockText|contains: ':\Program Files\Amazon\WorkSpacesConfig\Scripts\'
+        ScriptBlockText|contains|all:
+            - ':\Program Files\Amazon\WorkSpacesConfig\Scripts\'
+            - '$PSScriptRoot\Module\WorkspaceScriptModule\WorkspaceScriptModule'
     condition: selection and not filter
 falsepositives:
     - Unknown