Add InjectionModuleStompingProbing signature

modules/signatures/windows/injection_modulestomping.py

@@ -0,0 +1,85 @@
+# Copyright (C) 2026 Kevin Ross
+#
+# 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 InjectionModuleStompingProbing(Signature):
+    name = "injection_module_stomping_probing"
+    description = "Executes loops of failed RWX memory allocations returning CONFLICTING_ADDRESSES in high-memory ranges, indicative of code cave hunting or module stomping"
+    severity = 3
+    confidence = 30
+    categories = ["evasion", "injection", "stealth"]
+    authors = ["Kevin Ross", "Gemini"]
+    minimum = "1.3"
+    evented = True
+    ttps = ["T1055"]
+
+    filter_apinames = {"NtAllocateVirtualMemory", "VirtualAlloc", "VirtualAllocEx"}
+
+    def __init__(self, *args, **kwargs):
+        Signature.__init__(self, *args, **kwargs)
+        self.ret = False
+        self.failed_allocations = {}   
+        self.marked_count = 0 
+
+    def on_call(self, call, process):
+        pid = process.get("process_id")
+        proc_name = process.get("process_name", "unknown")
+
+        call_status = call.get("status", True)
+        call_return = str(call.get("return", "")).lower()
+
+        # 0xffffffffc0000018 is STATUS_CONFLICTING_ADDRESSES
+        if not call_status or "c0000018" in call_return:
+            protection = self.get_argument(call, "Protection") or self.get_argument(call, "flProtect")
+
+            if protection:
+                try:
+                    prot_val = int(protection, 16) if isinstance(protection, str) else protection
+
+                    # 0x40 is PAGE_EXECUTE_READWRITE (RWX)
+                    if prot_val == 0x40:
+
+                        if pid not in self.failed_allocations:
+                            self.failed_allocations[pid] = {
+                                "proc_name": proc_name,
+                                "count": 0
+                            }
+
+                        self.failed_allocations[pid]["count"] += 1
+                        if self.marked_count < 20:
+                            self.mark_call()
+                            self.marked_count += 1
+                            self.ret = True
+
+                except (ValueError, TypeError):
+                    pass
+
+    def on_complete(self):
+        if self.ret:
+            formatted_results = []
+
+            for pid, data in self.failed_allocations.items():
+                count = data["count"]
+                proc_name = data["proc_name"]
+
+                if count > 5:
+                    formatted_results.append(f"pid {pid} process {proc_name} executed {count} probes")
+
+            if formatted_results:
+                self.data.append({"rwx_probing_loops_detected": formatted_results})
+                return True
+
+        return False