Adding signature to detect API hammering technique

modules/signatures/windows/antisandbox_api_hammering.py

@@ -0,0 +1,34 @@
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from lib.cuckoo.common.abstracts import Signature
+
+class ApiHammering(Signature):
+    name = "api_hammering"
+    description = "Makes an unusually high volume of API calls, possibly in the attempt to crash the sandbox."
+    severity = 1
+    categories = ["anti-sandbox"]
+    minimum = "2.0"
+    ttp = ["T1106", "T1497"]
+
+    def on_complete(self):
+        apistats = self.get_results("behavior", {}).get("apistats", {})
+        for pid in apistats:
+            process_apistats = apistats[pid]
+            for api_call in process_apistats:
+                process_api_call_count = process_apistats[api_call]
+                if process_api_call_count > 10000:
+                    description = "Process %s made the call %s %d times" % (pid, api_call, process_api_call_count)
+                    self.mark(description=description)
+        return self.has_marks()
+