mirror of https://github.com/MISP/PyMISP
286 lines
14 KiB
Python
Executable File
286 lines
14 KiB
Python
Executable File
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# -*- coding: utf-8 -*-
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import os
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from .. import MISPEvent
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try:
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from bs4 import BeautifulSoup
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has_bs4 = True
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except ImportError:
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has_bs4 = False
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iocMispMapping = {
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'CookieHistoryItem/HostName': {'type': 'hostname', 'comment': 'CookieHistory.'},
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'DriverItem/DriverName': {'category': 'Artifacts dropped', 'type': 'other', 'comment': 'DriverName.'},
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'DriverItem/CertificateIssuer': {'category': 'Artifacts dropped', 'type': 'other', 'comment': 'DriverCertificateIssuer.'},
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'DriverItem/DeviceItem/AttachedDeviceName': {'category': 'Artifacts dropped', 'type': 'other', 'comment': 'DriverDeviceName. '},
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'DnsEntryItem/Host': {'type': 'domain'},
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'DnsEntryItem/RecordName': {'type': 'domain'},
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'Email/To': {'type': 'target-email'},
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'Email/Date': {'type': 'comment', 'comment': 'EmailDate.'},
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'Email/Body': {'type': 'email-subject'},
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'Email/From': {'type': 'email-dst'},
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'Email/Subject': {'type': 'email-subject'},
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'Email/Attachment/Name': {'type': 'email-attachment'},
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'FileItem/Md5sum': {'type': 'md5'},
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'FileItem/Sha1sum': {'type': 'sha1'},
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'FileItem/FileName': {'type': 'filename'},
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'FileItem/FullPath': {'type': 'filename'},
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'FileItem/FilePath': {'type': 'filename'},
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'FileItem/Sha256sum': {'type': 'sha256'},
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'FileItem/DevicePath': {'type': 'comment', 'comment': 'DevicePath. '},
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'FileItem/SizeInBytes': {'type': 'size-in-bytes'},
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'FileItem/PEInfo/Type': {'type': 'comment', 'comment': 'PE Type. '},
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'FileItem/FileExtension': {'type': 'comment', 'comment': 'FileExtension. '},
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'FileItem/FilenameCreated': {'type': 'filename', 'comment': 'FilenameCreated. '},
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'FileItem/StringList/string': {'type': 'pattern-in-file', 'comment': 'string list. '},
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'FileItem/PEInfo/PETimeStamp': {'type': 'pattern-in-file', 'comment': 'PE TimeStamp. '},
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'FileItem/PEInfo/Exports/DllName': {'type': 'pattern-in-memory', 'comment': 'PE export DllName. '},
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'FileItem/PEInfo/Sections/Section/Name': {'type': 'pattern-in-memory', 'comment': 'PE SectionName. '},
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'FileItem/PEInfo/DetectedAnomalies/string': {'type': 'pattern-in-file', 'comment': 'PE DEtected AnomaliesString. '},
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'FileItem/PEInfo/Exports/NumberOfFunctions': {'type': 'pattern-in-file', 'comment': 'PE Export NumberOfFunctions. '},
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'FileItem/PEInfo/ImportedModules/Module/Name': {'type': 'pattern-in-file', 'comment': 'PE ImportedModulesName. '},
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'FileItem/PEInfo/DigitalSignature/Description': {'type': 'comment', 'comment': 'PE DigitalSignatureDescription. '},
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'FileItem/PEInfo/DigitalSignature/SignatureExists': {'type': 'comment', 'comment': 'PE SignatureExists. '},
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'FileItem/PEInfo/Exports/ExportedFunctions/string': {'type': 'comment', 'comment': 'PE ExportedFunctions. '},
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'FileItem/PEInfo/DigitalSignature/CertificateIssuer': {'type': 'comment', 'comment': 'PE SignatureCertificateIssuer. '},
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'FileItem/PEInfo/DigitalSignature/SignatureVerified': {'type': 'comment', 'comment': 'PE SignatureVerified. '},
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'FileItem/PEInfo/DigitalSignature/CertificateSubject': {'type': 'other', 'comment': 'PE CertificateDigitalSignatureSubject. '},
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'FileItem/PEInfo/ResourceInfoList/ResourceInfoItem/Name': {'type': 'comment', 'comment': 'PE ResourceName. '},
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'FileItem/PEInfo/ResourceInfoList/ResourceInfoItem/Type': {'type': 'comment', 'comment': 'PE ResourceType. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/Language': {'type': 'pattern-in-file', 'comment': 'PE LanguageVersion. '},
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'FileItem/PEInfo/ResourceInfoList/ResourceInfoItem/Language': {'type': 'pattern-in-file', 'comment': 'PE LanguageResource. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/CompanyName': {'type': 'pattern-in-file', 'comment': 'PE versionInfo CompanyName. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/FileVersion': {'type': 'pattern-in-file', 'comment': 'PE Version. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/ProductName': {'type': 'pattern-in-file', 'comment': 'PE ProductName. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/InternalName': {'type': 'pattern-in-file', 'comment': 'PE InternalName. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/LegalCopyright': {'type': 'pattern-in-file', 'comment': 'PE LegalCopyright. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/ProductVersion': {'type': 'pattern-in-file', 'comment': 'PE ProductVersion. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/FileDescription': {'type': 'comment', 'comment': 'PE FileDescription .'},
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'FileItem/PEInfo/ImportedModules/Module/ImportedFunctions/string': {'type': 'pattern-in-file', 'comment': 'PE ImportedModules. '},
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'FileItem/PEInfo/VersionInfoList/VersionInfoItem/OriginalFilename': {'type': 'pattern-in-file', 'comment': 'OriginalFilename of PE. '},
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'FormHistoryItem/HostName': {'type': 'hostname', 'comment': 'FormHistory. '},
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'Network/URI': {'type': 'uri'},
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'Network/DNS': {'type': 'domain'},
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'Network/String': {'type': 'url'},
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'Network/IPRange': {'type': 'ip-dst'},
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'Network/UserAgent': {'type': 'user-agent'},
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'PortItem/localIP': {'type': 'ip-src'},
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'PortItem/remoteIP': {'type': 'ip-dst'},
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'PortItem/remotePort': {'type': 'pattern-in-traffic', 'comment': 'RemotePort. '},
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'ProcessItem/name': {'type': 'pattern-in-memory', 'comment': 'ProcessName. '},
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'ProcessItem/path': {'type': 'pattern-in-memory', 'comment': 'ProcessPath. '},
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'ProcessItem/Mutex': {'type': 'mutex', 'comment': 'mutex'},
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'ProcessItem/arguments': {'type': 'pattern-in-memory', 'comment': 'ProcessArguments. '},
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'ProcessItem/NamedPipe': {'type': 'named pipe'},
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'ProcessItem/Pipe/Name': {'type': 'named pipe'},
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'ProcessItem/Mutex/Name': {'type': 'mutex', 'comment': 'MutexName. '},
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'ProcessItem/Event/Name': {'type': 'pattern-in-memory', 'comment': 'ProcessEventName. '},
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'ProcessItem/StringList/string': {'type': 'pattern-in-memory', 'comment': 'StringlistName. '},
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'ProcessItem/HandleList/Handle/Name': {'type': 'pattern-in-memory', 'comment': 'ProcessHandleListName'},
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'ProcessItem/HandleList/Handle/Type': {'type': 'pattern-in-memory', 'comment': 'ProcessHandleType'},
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'ProcessItem/SectionList/MemorySection/Name': {'type': 'pattern-in-memory', 'comment': 'ProcessSectionMemoryName'},
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'ProcessItem/SectionList/MemorySection/PEInfo/Exports/DllName': {'type': 'pattern-in-memory', 'comment': 'ProcessMemoryPEExportsDllName'},
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'ProcessItem/SectionList/MemorySection/PEInfo/Sections/Section/Name': {'type': 'pattern-in-memory', 'comment': 'Section name from PE in process memory section'},
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'RegistryItem/Text': {'type': 'regkey', 'comment': 'RegistryText. '},
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'RegistryItem/Path': {'type': 'regkey', 'comment': 'RegistryPath. '},
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'RegistryItem/Value': {'type': 'regkey', 'comment': 'RegistryValue. '},
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'RegistryItem/KeyPath': {'type': 'regkey', 'comment': 'RegistryKeyPath. '},
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'RegistryItem/ValueName': {'type': 'regkey', 'comment': 'RegistryValueName. '},
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'RouteEntryItem/Destination': {'type': 'ip-dst'},
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'RouteEntryItem/Destination/IP': {'type': 'ip-dst', 'comment': 'RouteDestination. '},
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'RouteEntryItem/Destination/string': {'type': 'hostname', 'comment': 'RouteDestination. '},
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'ServiceItem/name': {'type': 'windows-service-name'},
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'ServiceItem/type': {'type': 'pattern-in-memory', 'comment': 'ServiceType. '},
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'ServiceItem/startedAs': {'type': 'pattern-in-memory', 'comment': 'ServiceStartedAs. '},
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'ServiceItem/serviceDLL': {'type': 'pattern-in-memory', 'comment': 'ServiceDll. '},
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'ServiceItem/description': {'type': 'comment', 'comment': 'ServiceDescription. '},
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'ServiceItem/descriptiveName': {'type': 'windows-service-displayname'},
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'ServiceItem/serviceDLLmd5sum': {'type': 'md5', 'comment': 'ServiceDLL. '},
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'ServiceItem/serviceDLLsha1sum': {'type': 'sha1', 'comment': 'ServiceDLL. '},
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'ServiceItem/serviceDLLsha256sum': {'type': 'sha256', 'comment': 'ServiceDLL. '},
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'ServiceItem/serviceDLLSignatureVerified': {'type': 'pattern-in-memory', 'comment': 'ServiceDllSignatureVerified. '},
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'Snort/Snort': {'type': 'snort'},
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'SystemInfoItem/HostName': {'type': 'hostname', 'comment': 'SystemInfo. '},
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'TaskItem/Name': {'type': 'windows-scheduled-task', 'comment': 'TaskName. '},
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'TaskItem/sha1sum': {'type': 'windows-scheduled-task', 'comment': 'TashSha1. '},
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'TaskItem/sha256sum': {'type': 'windows-scheduled-task', 'comment': 'TashSha256. '},
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'TaskItem/AccountName': {'type': 'windows-scheduled-task', 'comment': 'TaskAccountName'},
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'TaskItem/ActionList/Action/ExecProgramPath': {'type': 'windows-scheduled-task', 'comment': 'TaskExecProgramPath. '},
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'TaskItem/TriggerList/Trigger/TriggerFrequency': {'type': 'windows-scheduled-task', 'comment': 'TaskTriggerFrequency. '},
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'UrlHistoryItem/URL': {'type': 'url', 'comment': 'UrlHistory. '},
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'UrlHistoryItem/HostName': {'type': 'hostname', 'comment': 'UrlHistory. '},
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'Yara/Yara': {'type': 'yara'}
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}
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iocMispCompositeMapping = {
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# mapping for composite object
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# maybe later filename|sizeinbyte
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'FileItem/FileName|FileItem/Md5sum': {'type': 'filename|md5'},
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'FileItem/FileName|FileItem/Sha1sum': {'type': 'filename|sha1'},
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'FileItem/FileName|FileItem/Sha256sum': {'type': 'filename|sha256'},
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'Network/DNS|PortItem/remoteIP': {'type': 'domain|ip'},
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'PortItem/remoteIP|PortItem/remotePort': {'type': 'ip-dst|port'},
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'RegistryItem/Path|RegistryItem/Value': {'type': 'regkey|value'},
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'RegistryItem/KeyPath|RegistryItem/Value': {'type': 'regkey|value'},
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'RegistryItem/Path|RegistryItem/Text': {'type': 'regkey|value'}
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}
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def extract_field(report, field_name):
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if report:
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data = report.find(field_name.lower())
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if data and hasattr(data, 'text'):
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return data.text
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return ''
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def load_openioc_file(openioc_path):
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if not os.path.exists(openioc_path):
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raise Exception("Path doesn't exists.")
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with open(openioc_path, 'r') as f:
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return load_openioc(f)
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def load_openioc(openioc):
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# Takes a opened file, or a string
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if not has_bs4:
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raise Exception('You need to install BeautifulSoup: pip install bs4')
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misp_event = MISPEvent()
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iocreport = BeautifulSoup(openioc, "html.parser")
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# Set event fields
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info = extract_field(iocreport, 'short_description')
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if info:
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misp_event.info = info
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date = extract_field(iocreport, 'authored_date')
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if date:
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misp_event.set_date(date)
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# Set special attributes
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description = extract_field(iocreport, 'description')
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if description:
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if not misp_event.info:
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misp_event.info = description
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else:
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misp_event.add_attribute('comment', description)
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if not misp_event.info:
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misp_event.info = 'OpenIOC import'
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author = extract_field(iocreport, 'authored_by')
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if author:
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misp_event.add_attribute('comment', author)
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misp_event = set_all_attributes(iocreport, misp_event)
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return misp_event
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def get_mapping(openioc_type, mappingDict=iocMispMapping):
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t = openioc_type.lower()
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for k, v in mappingDict.items():
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if k.lower() == t:
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return v
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return False
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def set_values(value1, value2=None):
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attribute_values = {}
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if value2 is not None:
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# construct attribut composite value
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value = "{}|{}".format(extract_field(value1, 'Content'),
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extract_field(value2, 'Content')
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)
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else:
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value = extract_field(value1, 'Content')
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if value:
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attribute_values['value'] = value
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else:
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return None
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if value2 is not None:
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# construct attribut composite type
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compositeMapping = '{}|{}'.format(value1.find('context')['search'], value2.find('context')['search'])
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mapping = get_mapping(compositeMapping, mappingDict=iocMispCompositeMapping)
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else:
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context_search = value1.find('context')['search']
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content_type = value1.find('content').get('type', None)
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if "RouteEntryItem/Destination" in context_search and content_type:
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mapping = get_mapping(context_search + '/' + content_type)
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else:
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mapping = get_mapping(context_search)
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if mapping:
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attribute_values.update(mapping)
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else:
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# Unknown mapping, assign to default
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attribute_values['category'] = 'External analysis'
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attribute_values['type'] = 'other'
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# change value to composite
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# 127.0.0.1:80 ip-* to 127.0.0.1|80 ip-*|port
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if attribute_values['type'] in ['ip-src', 'ip-dst'] and attribute_values['value'].count(':') == 1:
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attribute_values['type'] = attribute_values['type'] + '|port'
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attribute_values['value'] = attribute_values['value'].replace(':', '|')
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attribute_values["comment"] = '{}{}'.format(extract_field(value1, 'Comment'),
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extract_field(value2, 'Comment')
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)
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return attribute_values
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def set_all_attributes(openioc, misp_event):
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processed = set()
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# check for composite item
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for composite in openioc.find_all("indicator", operator="AND"):
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# check for composite number under
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childs = composite.find_all('indicatoritem')
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if len(childs) == 2:
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childList = [child.find('context')['search'] for child in childs]
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def check_and_add(value1, value2):
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if (value1 and value2) in childList:
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if childs[0].find('context')['search'] == value1:
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attribute_values = set_values(childs[0], childs[1])
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else:
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attribute_values = set_values(childs[1], childs[0])
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misp_event.add_attribute(**attribute_values)
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processed.add(childs[0]['id'])
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processed.add(childs[1]['id'])
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for k in iocMispCompositeMapping:
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check_and_add(k.split('|')[0], k.split('|')[1])
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for item in openioc.find_all("indicatoritem"):
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# check if id in processed list
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if item['id'] in processed:
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continue
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attribute_values = set_values(item)
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if attribute_values is None:
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continue
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misp_event.add_attribute(**attribute_values)
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return misp_event
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