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117 lines
4.2 KiB
Python
117 lines
4.2 KiB
Python
# Mobile Verification Toolkit (MVT)
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# Copyright (c) 2021-2023 The MVT Authors.
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# Use of this software is governed by the MVT License 1.1 that can be found at
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# https://license.mvt.re/1.1/
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from .artifact import AndroidArtifact
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INTENT_NEW_OUTGOING_SMS = "android.provider.Telephony.NEW_OUTGOING_SMS"
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INTENT_SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED"
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INTENT_DATA_SMS_RECEIVED = "android.intent.action.DATA_SMS_RECEIVED"
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INTENT_PHONE_STATE = "android.intent.action.PHONE_STATE"
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INTENT_NEW_OUTGOING_CALL = "android.intent.action.NEW_OUTGOING_CALL"
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class DumpsysReceiversArtifact(AndroidArtifact):
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"""
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Parser for dumpsys receivers in the package section
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"""
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def check_indicators(self) -> None:
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for intent, receivers in self.results.items():
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for receiver in receivers:
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if intent == INTENT_NEW_OUTGOING_SMS:
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self.log.info(
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'Found a receiver to intercept outgoing SMS messages: "%s"',
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receiver["receiver"],
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)
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elif intent == INTENT_SMS_RECEIVED:
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self.log.info(
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'Found a receiver to intercept incoming SMS messages: "%s"',
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receiver["receiver"],
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)
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elif intent == INTENT_DATA_SMS_RECEIVED:
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self.log.info(
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'Found a receiver to intercept incoming data SMS message: "%s"',
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receiver["receiver"],
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)
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elif intent == INTENT_PHONE_STATE:
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self.log.info(
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"Found a receiver monitoring "
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'telephony state/incoming calls: "%s"',
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receiver["receiver"],
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)
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elif intent == INTENT_NEW_OUTGOING_CALL:
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self.log.info(
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'Found a receiver monitoring outgoing calls: "%s"',
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receiver["receiver"],
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)
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if not self.indicators:
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continue
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ioc = self.indicators.check_app_id(receiver["package_name"])
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if ioc:
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receiver["matched_indicator"] = ioc
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self.detected.append({intent: receiver})
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continue
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def parse(self, output: str) -> None:
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self.results = {}
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in_receiver_resolver_table = False
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in_non_data_actions = False
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intent = None
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for line in output.splitlines():
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if line.startswith("Receiver Resolver Table:"):
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in_receiver_resolver_table = True
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continue
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if not in_receiver_resolver_table:
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continue
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if line.startswith(" Non-Data Actions:"):
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in_non_data_actions = True
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continue
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if not in_non_data_actions:
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continue
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# If we hit an empty line, the Non-Data Actions section should be
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# finished.
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if line.strip() == "":
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break
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# We detect the action name.
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if (
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line.startswith(" " * 6)
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and not line.startswith(" " * 8)
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and ":" in line
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):
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intent = line.strip().replace(":", "")
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self.results[intent] = []
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continue
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# If we are not in an intent block yet, skip.
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if not intent:
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continue
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# If we are in a block but the line does not start with 8 spaces
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# it means the block ended a new one started, so we reset and
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# continue.
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if not line.startswith(" " * 8):
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intent = None
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continue
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# If we got this far, we are processing receivers for the
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# activities we are interested in.
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receiver = line.strip().split(" ")[1]
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package_name = receiver.split("/")[0]
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self.results[intent].append(
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{
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"package_name": package_name,
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"receiver": receiver,
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}
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)
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