端口反弹型木马的通信技术研究(英文)-豆柴文库

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端口反弹型木马的通信技术研究(英文)
Title:ResearchonCommunicationTechniquesofPort-ResidentTrojan
Introduction:
Port-residenttrojans,alsoknownasreverseshelltrojans,areatypeofmalwarethatallowsanattackertogainunauthorizedaccesstoatargetsystemandcontrolitremotely.Thistypeoftrojanisspecificallydesignedtobypassfirewallsandothersecuritymeasuresbyestablishingaconnectionbetweentheinfectedhostandtheattacker'scommandandcontrolserverthroughaspecificport.Inthisresearchpaper,wewillexplorethecommunicationtechniquesemployedbyport-residenttrojans,theirimplications,andpotentialcountermeasurestomitigatetherisksassociatedwiththesethreats.
CommunicationTechniques:
1.PortRedirection:Port-residenttrojansoftenutilizeportredirectiontechniquestoestablishaconnectionwiththeattacker'sserver.Byredirectingincomingnetworktrafficfromaspecificportthatmaybeusedbylegitimateprocessesorservices,thetrojancanavoidsuspicionandremainundetected.Inthistechnique,thetrojanlistensonadifferentportthattypicallyhaslownetworktraffic,ensuringthatthetargetedportremainsavailableforlegitimateservices.
2.Encryption:Communicationchannelsbetweentheinfectedhostandtheattacker'sserveroftenemployencryptionalgorithmstoensureconfidentiality,integrity,andauthenticity.Encryptionhelpsprotecttheexchangeddatafrombeinginterceptedortamperedwithbynetworksecuritydevices.Trojanstypicallyuseasymmetricencryptionforinitialauthenticationwiththeserverandthentransitiontosymmetricencryptionforfasterandefficientcommunication.
3.Tunneling:Port-residenttrojansmayleveragetunnelingtechniquestoencapsulatetheircommunicationwithinadifferentnetworkprotocolorservice.Thisallowsthetrojantobypassnetworkfilteringordetectionsystemsthatareonlymonitoringspecificprotocolsorservices.CommontunnelingtechniquesincludeHTTPorHTTPSencapsulation,DNStunneling,orevenusingcommonlyallowedserviceslikeFTPorICMPtodisguisemalicioustraffic.
4.DynamicDNS:Tomaintainapersistentconnection,manyport-residenttrojansemployDynamicDomainNameSystem(DNS)resolution.ByusingadynamicDNSservice,thetrojancanautoma