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Add DLP log parser for MPDlpLog files #2

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Add DLP log parser for MPDlpLog files #2

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33 changes: 32 additions & 1 deletion mplog_parser/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ def __init__(self, adapter: OsAdapter, mplogs_directory: str, output_directory:
self._detection_event_pattern: str = r'([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{3}Z).*(DETECTIONEVENT MPSOURCE_SYSTEM) (.*)'
self._original_filename_pattern: str = r'([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{3}Z).*(original file name) "(.*)" (for) "(.*)", (hr)=(\w*)'
self._ems_pattern: str = r'([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{3}Z).*(process): (\w*) (pid): (\d*), (sigseq): (\w*), (sendMemoryScanReport): (\d*), (source): (\d*)'
self._dlp_pattern: str = r'([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]+Z) \[DLP\] DLP Notification:\n\tPolicy Version: \|?(.+),\n\tRule Id: \|?(.+),\n\tEnforcement Level: (.+),\n\tAction Type: (.+),\n\tProcess Name: (.+),\n\tProcess ID: (.+),\n\tUser SID: (.+),\n\tSource: \|?(.+),\n\tTarget: (.+),\n\tSession ID: (.+),\n\tAudit Reason: (.+),\n\tFilterElapsedMs: (.+),\n\tEventElapsedMs: (.+),\n\tSenseElapsedMs: (.+),\n\tToastElapsedMs: (.+),\n\tTotalMs: (.+),\n\tToastType: (.+)'
self._process_image_name_pattern: str = r'([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{3}Z) (ProcessImageName): (.*), (Pid): (\d*), (TotalTime): (\d*), (Count): (\d*), (MaxTime): (\d*), (MaxTimeFile): (.*), (EstimatedImpact): (.*)'
self._bm_telemetry_pattern: str = r'BEGIN BM telemetry(?:.*\n)+?END BM telemetry'
self._resource_scan_pattern: str = r'Begin Resource Scan(?:.*\n)+?End Scan'
Expand All @@ -56,8 +57,10 @@ def __init__(self, adapter: OsAdapter, mplogs_directory: str, output_directory:
self._process_image_name_csv_output = self._os_adapter.join(self._output_directory,
'MPLog_ProcessImageName.csv')
self._rtp_perf_csv_output = self._os_adapter.join(self._output_directory, 'MPLog_RTPPerf.csv')
self._dlp_output_csv = self._os_adapter.join(self._output_directory, 'MPLog_DLP.csv')
self._entries_parser_regex = re.compile(r'^([\w -]+):(.+)$', re.MULTILINE)
self.mplog_file_name_pattern = '*MPLog-*'
self.dlplog_file_name_pattern = '*MPDlpLog-*'

EPOCH_AS_FILETIME: int = 116444736000000000 # January 1, 1970 as MS file time
HUNDREDS_OF_NANOSECONDS: int = 10000000
Expand Down Expand Up @@ -208,6 +211,32 @@ def ems_parser(self, logs: str) -> list[dict[str, Union[list[Any], Any]]]:
})
return results

def dlp_parser(self, logs: str) -> list[dict[str, Union[list[Any], Any]]]:
"""Parses DLP notification log entries from MPDlpLog files."""
results: list[dict[str, Any]] = list()
for match in re.findall(self._dlp_pattern, logs, re.MULTILINE):
results.append({
'timestamp': match[0],
'policy_version': match[1].strip(),
'rule_id': match[2].strip(),
'enforcement_level': match[3].strip(),
'action_type': match[4].strip(),
'process_name': match[5].strip(),
'process_id': match[6].strip(),
'user_sid': match[7].strip(),
'source': match[8].strip(),
'target': match[9].strip(),
'session_id': match[10].strip(),
'audit_reason': match[11].strip(),
'filter_elapsed_ms': match[12].strip(),
'event_elapsed_ms': match[13].strip(),
'sense_elapsed_ms': match[14].strip(),
'toast_elapsed_ms': match[15].strip(),
'total_ms': match[16].strip(),
'toast_type': match[17].strip(),
})
return results

def originalfilename_parser(self, logs: str) -> list[dict[str, Union[list[Any], Any]]]:
"""Parses original file name change log entries."""
results: list[dict[str, Any]] = list()
Expand Down Expand Up @@ -301,12 +330,13 @@ def threatactions_parser(self, logs: str) -> list[dict[str, Union[list[Any], Any
def orchestrator(self) -> None:
"""Runs parsers and writes results to output files."""
for file in self._os_adapter.listdir(self._mplogs_directory):
if fnmatch.fnmatch(file, self.mplog_file_name_pattern):
if fnmatch.fnmatch(file, self.mplog_file_name_pattern) or fnmatch.fnmatch(file, self.dlplog_file_name_pattern):
full_path = self._os_adapter.join(self._mplogs_directory, file)
try:
logs = self._os_adapter.read_file(full_path, 'r', 'UTF-16')
except UnicodeError:
logs = self._os_adapter.read_file(full_path, 'r', 'UTF-8')
logs = logs.replace('\r\n', '\n')
self.write_results(self._rtp_perf_csv_output, self.rtp_perf_parser(logs))
self.write_results(self._exclusion_list_output_csv, self.exclusion_list_parser(logs))
self.write_results(self._mini_filter_unsuccessful_scan_status_output_csv,
Expand All @@ -323,6 +353,7 @@ def orchestrator(self) -> None:
self.write_results(self._bm_telemetry_output_csv, self.bmtelemetry_parser(logs))
self.write_results(self._resource_scan_output_csv, self.resourcescan_parser(logs))
self.write_results(self._threat_action_output_csv, self.threatactions_parser(logs))
self.write_results(self._dlp_output_csv, self.dlp_parser(logs))


def main() -> None:
Expand Down