diff --git a/modules/signatures/windows/evasion_veh.py b/modules/signatures/windows/evasion_veh.py new file mode 100644 index 00000000..34a037ea --- /dev/null +++ b/modules/signatures/windows/evasion_veh.py @@ -0,0 +1,42 @@ +# 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 . + +from lib.cuckoo.common.abstracts import Signature + +class RegistersVectoredExceptionHandler(Signature): + name = "registers_vectored_exception_handler" + description = "Registers a vectored exception handler (VEH), possibly to hijack execution flow" + severity = 2 + confidence = 80 + categories = ["evasion", "execution", "injection"] + authors = ["Kevin Ross"] + minimum = "1.3" + evented = True + ttps = ["T1055", "T1574"] + + filter_apinames = {"RtlAddVectoredExceptionHandler", "AddVectoredExceptionHandler"} + + def __init__(self, *args, **kwargs): + Signature.__init__(self, *args, **kwargs) + self.ret = False + + def on_call(self, call, process): + handler_address = self.get_argument(call, "Handler") or self.get_argument(call, "VectorHandler") + if handler_address: + self.mark_call() + self.ret = True + + def on_complete(self): + return self.ret