From 21b559c97f2b53bf28345c337bfa187ed29f5535 Mon Sep 17 00:00:00 2001
From: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
Date: Thu, 8 Feb 2024 06:27:16 -0300
Subject: [PATCH] [Rule Tuning] Suspicious Antimalware Scan Interface DLL
 (#3432)

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
---
 rules/windows/defense_evasion_amsi_bypass_dllhijack.toml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rules/windows/defense_evasion_amsi_bypass_dllhijack.toml b/rules/windows/defense_evasion_amsi_bypass_dllhijack.toml
index 7760b4a98..afaa6c073 100644
--- a/rules/windows/defense_evasion_amsi_bypass_dllhijack.toml
+++ b/rules/windows/defense_evasion_amsi_bypass_dllhijack.toml
@@ -4,7 +4,7 @@ integration = ["windows", "endpoint"]
 maturity = "production"
 min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 min_stack_version = "8.3.0"
-updated_date = "2023/08/30"
+updated_date = "2024/02/06"
 
 [transform]
 [[transform.osquery]]
@@ -108,7 +108,7 @@ timestamp_override = "event.ingested"
 type = "eql"
 
 query = '''
-file where host.os.type == "windows" and event.action != "deletion" and file.path != null and
+file where host.os.type == "windows" and event.type != "deletion" and file.path != null and
  file.name : ("amsi.dll", "amsi") and not file.path : ("?:\\Windows\\system32\\amsi.dll", "?:\\Windows\\Syswow64\\amsi.dll", "?:\\$WINDOWS.~BT\\NewOS\\Windows\\WinSXS\\*", "?:\\$WINDOWS.~BT\\NewOS\\Windows\\servicing\\LCU\\*", "?:\\$WINDOWS.~BT\\Work\\*\\*", "?:\\Windows\\SoftwareDistribution\\Download\\*")
 '''