diff --git a/modules/signatures/all/flarecapa_targeting.py b/modules/signatures/all/flarecapa_targeting.py new file mode 100644 index 00000000..e674b82f --- /dev/null +++ b/modules/signatures/all/flarecapa_targeting.py @@ -0,0 +1,69 @@ +# Copyright (C) 2024 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 FlareCAPATargeting(Signature): + name = "flare_capa_targeting" + description = "CAPA detected specific system targeting capabilities" + severity = 3 + categories = ["guardrails"] + authors = ["Kevin Ross"] + minimum = "1.3" + evented = True + ttps = ["T1480"] + + def run(self): + ret = False + + target = self.results.get("target", {}) + if target.get("category") in ("file", "static") and target.get("file"): + capa = self.results["target"]["file"].get("flare_capa", []) + if capa: + samplesha256 = capa["sha256"] + capabilities = capa["CAPABILITY"] + for namespace, capability in capabilities.items(): + if "targeting" in namespace: + ret = True + joined = ', '.join(capability) + self.data.append({"target": "SHA256 %s - %s %s" % (samplesha256, namespace, joined)}) + + for block in self.results.get("CAPE", {}).get("payloads", []) or []: + capa = block.get("flare_capa", []) + if capa: + samplesha256 = capa["sha256"] + capabilities = capa["CAPABILITY"] + for namespace, capability in capabilities.items(): + if "targeting" in namespace: + ret = True + joined = ', '.join(capability) + self.data.append({"payload": "SHA256 %s - %s %s" % (samplesha256, namespace, joined)}) + + for keyword in ("procdump", "procmemory", "extracted", "dropped"): + if self.results.get(keyword) is not None: + for block in self.results.get(keyword, []): + if not isinstance(block, dict): + continue + capa = block.get("flare_capa", []) + if capa: + samplesha256 = capa["sha256"] + capabilities = capa["CAPABILITY"] + for namespace, capability in capabilities.items(): + if "targeting" in namespace: + ret = True + joined = ', '.join(capability) + self.data.append({keyword: "SHA256 %s - %s %s" % (samplesha256, namespace, joined)}) + + return ret