sans cti summit 2016 - data-driven threat intelligence: sharing
TRANSCRIPT
Data-DrivenThreatIntelligence:MetricsonIndicatorDisseminationandSharing
(#ddti)
AlexPintoChiefDataScientist
MLSec Project/Niddel@alexcpsec
@MLSecProject @NiddelCorp
• Previouslyon#ddti• ChallengesatTISharing• MeasuringTISharing• TheFutureofSharing
Agenda
Thisisadata-driventalk!Pleasecheckyouranecdotesatthedoor
Previouslyon#ddti• UsefulMethodsandMeasurementsforHandlingIndicators• AnalysisofThreatIntelligenceFeeds• Indirectly,amethodologyforanalyzingTIProviders
• Combine(https://github.com/mlsecproject/combine)• GathersTIdata(ip/host)fromInternetandlocalfiles
• TIQ-Test(https://github.com/mlsecproject/tiq-test)• RunsstatisticalsummariesandtestsonTIfeeds
TIQ-TEST- TonsofThreat-yTests
• NOVELTY – Howoftendothefeedsupdatethemselves?• AGING – Howlongdoesanindicatorsitonafeed?• POPULATION – Howdoesthispopulationdistributioncomparetomydata?
• OVERLAP– Howdotheindicatorscomparetotheonesyougot?
• UNIQUENESS – Howmanyindicatorsarefoundonlyononefeed?
Puttingthisthreatinteldatatowork
OverlapTestMoredataisfine,butmakesure
itisdifferent
OverlapTest- Outbound
UniquenessTestCanwetellifweareclosetofinding*all*thethreats?
Ihatequotingmyself,but…
KeyTakeaway#1
MORE!=BETTERThreatIntelligenceIndicatorFeeds
ThreatIntelligenceProgram
ConstructiveFeedbackfromtheInternet:
“TISharingisTOTALLYgoingtosolvethis”
Right,folks?Right?
TISharingSolutionPlan:
1. ThebestThreatIntelligenceistheonethatyouanalyzefromyourownincidents(homegrown/organicintelligence)
2. Thereisstrengthinnumbers– verticalherdimmunity!
3. ????????
4. PROFIT!!(oratleastSECURITY!!)
Oratleastaroughstrawman
IfCONSUMINGisforthe1%,whatisthepercentageoforganizationsabletoPRODUCE?
Issue1- BYOTI
Issue2- HerdImmunity
Source:www.vaccines.gov
• Wemaybeabletodetectmore”virusstrains”togetherbutweare*terrible*atinoculation.
• Thethingswedetectthemostmutatetoofast(PyramidofPain)
• Whodidn’tgetimmunized,stillgetssick(FOMO-TI)
Issue?- Whatarewesharing• AUTOMATION-DRIVEN(PLATFORMS)• StraighttothepointIOCsharing
• ANALYST-DRIVEN(COMMUNITIES)• Strategicdata,bestpractices,unstructuredIOCs
• ”Analyst-driven”hasbeenaroundforever(innon-IC,atleastsinceFS-ISACwascreated)
• Thesamepeoplewhobash”justIOCsharing”:• BashSTIX/TAXIIfortryingtoencodecomplexity• TellseveryoneitisIMPOSSIBLEtohireanalysts
TheCognitiveDissonancesofTISharing
Everybody shouldshare! TheCIRCLEOFTRUST
Doyoutrustthegroupenoughtoconsume?
TheTwoSidesoftheTrustCoin
Doyoutrustthegroupenoughtoshare?
Okay,I’llbite
Canwemeasureourcurrentsharingplatformscommunities?
ThreatIntelligenceSharingWewouldliketothankthekindcontributionofdatafromthefinefolksatFacebookThreatExchange andThreatConnect
…andalsothesharingcommunitiesthatchosetoremainanonymous.Youknowwhoyouare,andwe❤ youtoo.
SharingCommunitiesARESocialNetworks
SocialNetworkSelfie SharingCommunitySelfie
Let’slookattheindicatorsfirst
UsingTIQ-TESTOverlapandUniquenesstests
OVERLAPSLIDE
OVERLAPSLIDE
UNIQUENESSSLIDE
Lookslikewewouldgetsimilarqualityona”good”ThreatIntelligenceSharingPlatformaswewouldon
a”paidfeed"
SuggestedMetricsforSharing
• ACTIVITY – Howmanyindicators/postsarebeingshareddaybyday?
• DIVERSITY –Whatisthepercentageofthepopulationthatisactivelysharing?
• FEEDBACK – Areorgscollaboratingonimprovingtheknowledgeinthesharingenvironment?
• TRUST– Howmuchdataisshared”openly”inrelationto”privately”?
Lookingforhealthydynamics
ActivityMetricIsthereanyactualsharinggoing
on?
Lessdata/Delays Moredata/Timely
LargeGroupisroughly40xbiggerthanSmallGroup
Organizationsarelesslikelytoshareiftheyperceivethey”lostcontrol”ofwhocanconsume.
DiversityMetricCheckyoursharingprivilege
Roughly10%oftheorganizationssharedataintothecommunity
Someorganizationsareclearlyinabetterpositionoperationallyandlegallytoshare.Andthatis
expectedduetoourpremises.
FeedbackMetricButisthedataanygood?
🙀 I’msurewecandobetterthanthis🙀
FeedbackMetric• Almostnosupportonautomation-drivenplatforms• Someallowyoutoleave”comments”or”newdescriptors”fortheIOCs– evenbycountingthoseverylow%inrelationtonewshareddata
• Analyst-drivenenvironmentsallowforcollaborationone-mailsandforumpoststodescribeandrefinestrategiesandbestpractices.
Howcanwemakethiscollaborationworkonautomation-drivenplatforms?
TrustMetricArewehelpingallthecommunity
orjustafeworgsatatime?
76%.Again,soundsaboutright
Overall”quality”ofdatagoesuptoo!
TrustMetric• Theroughestimateseemstobethatmorethan60%of”sharing”(IOCs,messages,etc)happensin”privategroups”insidetheinfrastructureofthesharingplatform
• Allcommunitieshavethem:• PartoftheDNAoftheIC/clearedcommunity• Offsetsthetrustequation,butdefeatsthe”herdimmunity”argument• UsuallyMANDATORYoncollaborationwithLEA
Butthenthe”good”dataisnothelping”thecommunity”!Isthereanywaywecanreconcile?
TheFutureofSharing🔮Attheveryleastmyhumble
opinion
#squadgoalsIncreasetheTRUST
amongpeers
ReducetheTECHNICALBARRIERforsharinguseful
information
TRUST:ReputationandAnonymity
AlienVault OTXclearlygotthememo
TRUST:Anonymity+GoodCuration
Somesharingcommunitiesacceptanonymoussubmissionsthattheythencurateanddisseminate
toallorganizations
IOCs
Feedback
TelemetryLESSMATURE
MOREMATURE
With❤ andapologiesto@DavidJBianco
TECHNICALBARRIER:”PyramidofSharing”
Takeaways• IntelligenceSharingisaveryanalyst-centricactivitythatwehavebeentaskedwithscalingoutwithautomation.Nowonderitseemssohard.
• Datacanbeasgoodasapaidfeed,butyouhavetobeintherightcirclesoftrust
• Doesnotsolveanalystshortageandmakingtheindicators/strategiesoperationalintoyourenvironment
Thanks!
• Q&A?• Feedback!
”Themeasureofintelligenceistheabilitytochange."- AlbertEinstein
AlexPinto@alexcpsec
@MLSecProject /@NiddelCorp