diff --git a/src/cpdetect/compiler_detector/compiler_detector.cpp b/src/cpdetect/compiler_detector/compiler_detector.cpp
index 216807abe..fc967cf8e 100644
--- a/src/cpdetect/compiler_detector/compiler_detector.cpp
+++ b/src/cpdetect/compiler_detector/compiler_detector.cpp
@@ -434,7 +434,7 @@ ReturnCode CompilerDetector::getAllSignatures()
 					{
 						toolInfo.addTool(
 							DetectionMethod::YARA_RULE,
-							metaToStrength(rule.getMeta("language")),
+							metaToStrength(rule.getMeta("strength")),
 							toolType,
 							nameMeta->getStringValue(),
 							version,
diff --git a/support/yara_patterns/tools/pe/x64/installers.yara b/support/yara_patterns/tools/pe/x64/installers.yara
index 582ed8e80..f64350efc 100644
--- a/support/yara_patterns/tools/pe/x64/installers.yara
+++ b/support/yara_patterns/tools/pe/x64/installers.yara
@@ -5,6 +5,42 @@
 
 import "pe"
 
+rule pyinstaller_27
+{
+	meta:
+		tool = "I"
+		name = "PyInstaller"
+		version = "2.7"
+		strength = "high"
+	strings:
+		$s00 = "Cannot GetProcAddress for PySys_SetObject"
+		$s01 = "Error coping %s"
+		$s02 = "Error loading Python DLL: %s (error code %d)"
+		$s03 = "PYTHONHOME"
+	condition:
+		pe.number_of_resources > 0 and
+		@s00 < pe.sections[2].raw_data_offset and
+		all of them
+}
+
+rule pyinstaller_3x
+{
+	meta:
+		tool = "I"
+		name = "PyInstaller"
+		version = "3.x"
+		strength = "high"
+	strings:
+		$s00 = "Failed to get address for PySys_SetObject"
+		$s01 = "Error copying %s"
+		$s02 = "Error loading Python DLL '%s'"
+		$s03 = "pyi-windows-manifest-filename"
+	condition:
+		pe.number_of_resources > 0 and
+		@s00 < pe.sections[2].raw_data_offset and
+		all of them
+}
+
 rule winrar_sfx_392b1
 {
 	meta:
diff --git a/support/yara_patterns/tools/pe/x86/installers.yara b/support/yara_patterns/tools/pe/x86/installers.yara
index 93863e618..64b45124d 100644
--- a/support/yara_patterns/tools/pe/x86/installers.yara
+++ b/support/yara_patterns/tools/pe/x86/installers.yara
@@ -110,6 +110,42 @@ rule exemplar_installer {
 		$1 at pe.entry_point
 }
 
+rule pyinstaller_27
+{
+	meta:
+		tool = "I"
+		name = "PyInstaller"
+		version = "2.7"
+		strength = "high"
+	strings:
+		$s00 = "Cannot GetProcAddress for PySys_SetObject"
+		$s01 = "Error coping %s"
+		$s02 = "Error loading Python DLL: %s (error code %d)"
+		$s03 = "PYTHONHOME"
+	condition:
+		pe.number_of_resources > 0 and
+		@s00 < pe.sections[2].raw_data_offset and
+		all of them
+}
+
+rule pyinstaller_3x
+{
+	meta:
+		tool = "I"
+		name = "PyInstaller"
+		version = "3.x"
+		strength = "high"
+	strings:
+		$s00 = "Failed to get address for PySys_SetObject"
+		$s01 = "Error copying %s"
+		$s02 = "Error loading Python DLL '%s'"
+		$s03 = "pyi-windows-manifest-filename"
+	condition:
+		pe.number_of_resources > 0 and
+		@s00 < pe.sections[2].raw_data_offset and
+		all of them
+}
+
 rule installanywhere_61 {
 	meta:
 		tool = "I"