diff --git a/rules/windows/defense_evasion_suspicious_process_creation_calltrace.toml b/rules/windows/defense_evasion_suspicious_process_creation_calltrace.toml
index d0e9f6e7b..12097aa2f 100644
--- a/rules/windows/defense_evasion_suspicious_process_creation_calltrace.toml
+++ b/rules/windows/defense_evasion_suspicious_process_creation_calltrace.toml
@@ -1,7 +1,7 @@
 [metadata]
 creation_date = "2021/10/24"
 maturity = "production"
-updated_date = "2022/03/31"
+updated_date = "2022/08/01"
 
 [rule]
 author = ["Elastic"]
@@ -24,10 +24,21 @@ query = '''
 sequence by host.id with maxspan=1m
   [process where event.code == "1" and
    /* sysmon process creation */
-   process.parent.name : ("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe", "eqnedt32.exe",
-                          "fltldr.exe", "mspub.exe", "msaccess.exe", "powershell.exe", "pwsh.exe",
-                          "cscript.exe", "wscript.exe", "rundll32.exe", "regsvr32.exe", "mshta.exe",
-                          "wmic.exe", "cmstp.exe", "msxsl.exe")] by process.parent.entity_id, process.entity_id
+   process.parent.name : ("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe", "eqnedt32.exe", "fltldr.exe",
+                          "mspub.exe", "msaccess.exe","cscript.exe", "wscript.exe", "rundll32.exe", "regsvr32.exe",
+                          "mshta.exe", "wmic.exe", "cmstp.exe", "msxsl.exe") and
+
+   /* noisy FP patterns */
+   not (process.parent.name : "EXCEL.EXE" and process.executable : "?:\\Program Files\\Microsoft Office\\root\\Office*\\ADDINS\\*.exe") and
+   not (process.executable : "?:\\Windows\\splwow64.exe" and process.args in ("8192", "12288") and process.parent.name : ("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe")) and
+   not (process.parent.name : "rundll32.exe" and process.parent.args : ("?:\\WINDOWS\\Installer\\MSI*.tmp,zzzzInvokeManagedCustomActionOutOfProc", "--no-sandbox")) and
+   not (process.executable :
+            ("?:\\Program Files (x86)\\Microsoft\\EdgeWebView\\Application\\*\\msedgewebview2.exe",
+             "?:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\Acrobat.exe",
+             "?:\\Windows\\SysWOW64\\DWWIN.EXE") and
+        process.parent.name : ("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe")) and
+   not (process.parent.name : "regsvr32.exe" and process.parent.args : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*"))
+   ] by process.parent.entity_id, process.entity_id
   [process where event.code == "10" and
    /* Sysmon process access event from unknown module */
    winlog.event_data.CallTrace : "*UNKNOWN*"] by process.entity_id, winlog.event_data.TargetProcessGUID