Update vocabs.py

Author: Ben Schmoker

stix/common/vocabs.py

@@ -648,6 +648,18 @@ class ImpactRating_1_0(VocabString):
     TERM_NONE = "None"
     TERM_UNKNOWN = "Unknown"
 
+@register_vocab
+class DeceptionChain(VocabString):
+    _namespace = 'http://stix.mitre.org/default_vocabularies-1'
+    _XSI_TYPE = 'stixVocabs:SystemTypeVocab-1.0'
+    _VOCAB_VERSION = '1.0'
+
+    TERM_PURPOSE = "Purpose"
+    TERM_PURPOSE = "Purpose"
+    TERM_PURPOSE = "Purpose"
+    TERM_PURPOSE = "Purpose"
+    TERM_PURPOSE = "Purpose"
+
 
 @register_vocab
 class AssetType_1_0(VocabString):