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fix qradar logsource parsing#197

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Merged
alexvolha merged 3 commits intomainfromgis-8762
Sep 25, 2024
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Original file line numberDiff line numberDiff line change
Expand Up@@ -8,7 +8,7 @@ log_source:

default_log_source:
devicetype: 11
category:[4012]
category: 4012

field_mapping:
CommandLine: Command
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Original file line numberDiff line numberDiff line change
Expand Up@@ -8,7 +8,7 @@ log_source:

default_log_source:
devicetype: 102
category:[4012]
category: 4012

field_mapping:
CommandLine: Command
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Original file line numberDiff line numberDiff line change
Expand Up@@ -9,7 +9,7 @@ log_source:

default_log_source:
devicetype: 12
category:[4012]
category: 4012
qideventcategory: Microsoft-Windows-Sysmon/Operational

field_mapping:
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9 changes: 7 additions & 2 deletionsuncoder-core/app/translator/platforms/base/aql/mapping.py
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Expand Up@@ -39,7 +39,12 @@ def __str__(self) -> str:
@property
def extra_condition(self) -> str:
default_source = self._default_source
return " AND ".join((f"{key}={value}" for key, value in default_source.items() if key != "table" and value))
extra = []
for key, value in default_source.items():
if key != "table" and value:
_condition = f"{key}={value}" if isinstance(value, int) else f"{key}='{value}'"
extra.append(_condition)
return " AND ".join(extra)


class AQLMappings(BasePlatformMappings):
Expand All@@ -48,7 +53,7 @@ class AQLMappings(BasePlatformMappings):

def prepare_log_source_signature(self, mapping: dict) -> AQLLogSourceSignature:
log_source = mapping.get("log_source", {})
default_log_source = mapping.get("default_log_source")
default_log_source = mapping["default_log_source"]
return AQLLogSourceSignature(
device_types=log_source.get("devicetype"),
categories=log_source.get("category"),
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Expand Up@@ -37,13 +37,13 @@ class AQLQueryParser(PlatformQueryParser):
log_source_functions = ("LOGSOURCENAME", "LOGSOURCEGROUPNAME")
log_source_function_pattern = r"\(?(?P<key>___func_name___\([a-zA-Z]+\))(?:\s+like\s+|\s+ilike\s+|\s*=\s*)'(?P<value>[%a-zA-Z\s]+)'\s*\)?\s+(?:and|or)?\s" # noqa: E501

log_source_key_types = ("devicetype", "category", "qid", "qideventcategory", *LOG_SOURCE_FUNCTIONS_MAP.keys())
log_source_key_types = ("devicetype", "qideventcategory", "category", "qid", *LOG_SOURCE_FUNCTIONS_MAP.keys())
log_source_pattern = rf"___source_type___(?:\s+like\s+|\s+ilike\s+|\s*=\s*)(?:{SINGLE_QUOTES_VALUE_PATTERN}|{NUM_VALUE_PATTERN})(?:\s+(?:and|or)\s+|\s+)?" # noqa: E501
num_value_pattern = r"[0-9]+"
multi_num_log_source_pattern = (
rf"___source_type___\s+in\s+\((?P<value>(?:{num_value_pattern}(?:\s*,\s*)?)+)\)(?:\s+(?:and|or)\s+|\s+)?"
)
str_value_pattern = r"""(?:')(?P<s_q_value>(?:[:a-zA-Z\*0-9=+%#\-\/\\,_".$&^@!\(\)\{\}\s]|'')+)(?:')"""
str_value_pattern = r"""'(?P<s_q_value>(?:[:a-zA-Z\*0-9=+%#\-\/\\,_".$&^@!\(\)\{\}\s]|'')+)'"""
multi_str_log_source_pattern = (
rf"""___source_type___\s+in\s+\((?P<value>(?:{str_value_pattern}(?:\s*,\s*)?)+)\)(?:\s+(?:and|or)\s+|\s+)?"""
)
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Expand Up@@ -18,7 +18,6 @@
"""

from datetime import timedelta
from re import I
from typing import Optional, Union

from app.translator.core.exceptions.core import SigmaRuleValidationException
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