diff --git a/nursery/hash-data-using-sha1-via-x86-extensions.yml b/nursery/hash-data-using-sha1-via-x86-extensions.yml
new file mode 100644
index 00000000..77df26f6
--- /dev/null
+++ b/nursery/hash-data-using-sha1-via-x86-extensions.yml
@@ -0,0 +1,12 @@
+rule:
+  meta:
+    name: hash data using sha1 via x86 extensions
+    namespace: data-manipulation/hashing/sha1
+    author: "@_re_fox"
+    scope: basic block
+  features:
+    - or:
+      - mnemonic: sha1rnds4  #Perform Four Rounds of SHA1 Operation
+      - mnemonic: sha1nexte  #Calculate SHA1 State Variable E after Four Rounds
+      - mnemonic: sha1msg1  #Perform an Intermediate Calculation for the Next Four SHA1 Message Dwords
+      - mnemonic: sha1msg2 #Perform a Final Calculation for the Next Four SHA1 Message Dwords