Add hash algorithm for unknown Mythic agent

algorithms/mythic_unknown.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+
+DESCRIPTION = "API hash find in an unknown Mythic agent, need a XOR key"
+# Type can be either 'unsigned_int' (32bit) or 'unsigned_long' (64bit)
+TYPE = "unsigned_int"
+# Test must match the exact has of the string 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
+TEST_1 = 3762100525
+
+
+def hash(data):
+    crc = 0xffffffff
+    for val in data:
+        for _ in range(8):
+            tmp = crc
+            crc = crc >> 1 & 0xffffffff
+            if (val ^ tmp) & 1 != 0:
+                crc ^= 0xedb88320
+            val = val >> 1 & 0xffffffff
+    return crc