Nome del virus: Worm/IrcBot.590336 Scoperto: 20/08/2009 Tipo: Worm In circolazione (ITW): Si Numero delle infezioni segnalate: Medio-Basso Potenziale di propagazione: Medio-Basso Potenziale di danni: Medio File statico: Si Dimensione del file: 590.336 Byte Somma di controllo MD5: 2b5691b59afcb6382b005752fb0c1021 Versione IVDF: 7.01.05.143 - giovedì 20 agosto 2009
Generale Metodo di propagazione: • Autorun feature (it) • Rete locale Alias: • Mcafee: W32/IRCBot.worm.gen.ai • Panda: W32/IRCBot.CRP.worm • Eset: Win32/AutoRun.IRCBot.BP • Bitdefender: Trojan.Generic.2307849 Piattaforme / Sistemi operativi: • Windows 2000 • Windows XP • Windows 2003 Effetti secondari: • Blocca l'accesso a certi siti web • Blocca l'accesso a siti web di sicurezza • Duplica file “maligni” • Abbassa le impostazioni di sicurezza • Modifica del registro • Accesso e controllo del computer da parte di terzi File Si copia alle seguenti posizioni: • %SYSDIR% \wbem\wmiclisv.exe • %unità disco% \CACHESYS\DATA-345432365\device32.exe Sovrascrive un file. – %SYSDIR% \drivers\etc\hosts Cancella la copia di se stesso eseguita inizialmente. Viene creato il seguente file: – %unità disco% \CACHESYS\DATA-345432365\Desktop.ini – %unità disco% \autorun.inf Questo è un file di testo “non maligno” con il seguente contenuto: • – %SYSDIR% \drivers\drvmon64.sys Ulteriori analisi hanno accertato che questo file è anch'esso un malware. Riconosciuto come: Worm/IrcBot.11656.2 Registro Le seguenti chiavi di registro vengono aggiunte per eseguire i processi dopo il riavvio: – [HKLM\SYSTEM\CurrentControlSet\Services\drvmon64] • "DisplayName"="System Drive Monitor" • "ErrorControl"=dword:0x00000001 • "Group"="SST miniport drivers" • "ImagePath"="\??\%SYSDIR% \drivers\drvmon64.sys" • "Start"=dword:0x00000003 • "Type"=dword:0x00000001 – [HKLM\SYSTEM\CurrentControlSet\Services\WMICLISV] • "Description"="Manages WMI data for client applications." • "DisplayName"="WMI Client Service" • "ErrorControl"=dword:0x00000000 • "FailureActions"=hex:0A,00,00,00,00,00,00,00,00,00,00,00,01,00,00,00,00,00,00,00,01,00,00,00,B8,0B,00,00 • "ImagePath"=""%SYSDIR% \wbem\wmiclisv.exe"" • "ObjectName"="LocalSystem" • "Start"=dword:0x00000002 • "Type"=dword:0x00000110 Viene aggiunta la seguente chiave di registro: – [HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore] • "DisableConfig"=dword:0x00000001 Vengono cambiate le seguenti chiavi di registro: – [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ Folder\SuperHidden] Nuovo valore: • "CheckedValue"=dword:0x00000001 – [HKLM\SYSTEM\CurrentControlSet\Control] Nuovo valore: • "WaitToKillServiceTimeout"="7000" – [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\ FirewallPolicy\StandardProfile\AuthorizedApplications\List] Nuovo valore: • "%SYSDIR% \wbem\wmiclisv.exe"="%SYSDIR% \wbem\wmiclisv.exe:*:Microsoft Enabled" “Infezione” della rete Per assicurarsi la propria propagazione, il malware tenta di connettersi ad altre macchine come descritto qui sotto: Exploit: Sfrutta le seguenti vulnerabilità: – MS04-007 (ASN.1 Vulnerability) – MS06-040 (Vulnerability in Server Service) Generazione dell'indirizzo IP: Crea degli indirizzi IP casuali mentre mantiene il primo ottetto dal proprio indirizzo. In seguito prova a stabilire una connessione con gli indirizzi creati. Esecuzione remota: –Tenta di pianificare una esecuzione remota del malware, sulla macchina “infettata” recentemente. Per fare questo utilizza la funzione NetScheduleJobAdd. IRC Per inviare informazioni sul sistema e per fornire il controllo remoto, si connette ai seguenti server IRC: Server: euro.b-**********.info Porta: 7231 Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: mech.c-**********.info Porta: 32132 Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: spazm.a-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: centre.a-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: coax.a-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: com0.b-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: ptr.b-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: det0x.c-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! Server: sex.c-**********.info Canale: #sploit Nickname: [00|USA|XP|%numero% ] Password: sPLoiT! – In più ha la capacità di effettuare azioni quali: • Disattivare le condivisioni di rete • Attivare le condivisioni di rete • Eseguire file • Effettuare scansione della rete • Arrestare il sistema • Aggiornarsi Host L'host del file viene modificato come spiegato: – In questo caso i dati immessi già esistenti vengono cancellati. – L'accesso ai seguenti domini è effettivamente bloccato: • 127.0.0.1 msnfix.changelog.fr; 127.0.0.1 www.incodesolutions.com; 127.0.0.1 virusinfo.prevx.com; 127.0.0.1 download.bleepingcomputer.com; 127.0.0.1 www.dazhizhu.cn; 127.0.0.1 foro.noticias3d.com; 127.0.0.1 www.nabble.com; 127.0.0.1 lurker.clamav.net; 127.0.0.1 lexikon.ikarus.at; 127.0.0.1 research.sunbelt-software.com; 127.0.0.1 www.virusdoctor.jp; 127.0.0.1 www.elitepvpers.de; 127.0.0.1 www.superuser.co.kr; 127.0.0.1 ntfaq.co.kr; 127.0.0.1 v.dreamwiz.com; 127.0.0.1 cit.kookmin.ac.kr; 127.0.0.1 forums.whatthetech.com; 127.0.0.1 forum.hijackthis.de; 127.0.0.1 www.huaifai.go.th; 127.0.0.1 www.mostz.com; 127.0.0.1 www.krupunmai.com; 127.0.0.1 www.cddchiangmai.net; 127.0.0.1 forum.malekal.com; 127.0.0.1 tech.pantip.com; 127.0.0.1 sapcupgrades.com; 127.0.0.1 www.247fixes.com; 127.0.0.1 forum.sysinternals.com; 127.0.0.1 forum.telecharger.01net.com; 127.0.0.1 sophos.com; 127.0.0.1 foros.softonic.com; 127.0.0.1 avast-home.uptodown.com; 127.0.0.1 www.f-secure.com; 127.0.0.1 www.chkrootkit.org; 127.0.0.1 diamondcs.com.au; 127.0.0.1 www.rootkit.nl; 127.0.0.1 www.sysinternals.com; 127.0.0.1 z-oleg.com; 127.0.0.1 espanol.dir.groups.yahoo.com; 127.0.0.1 www.castlecrops.com; 127.0.0.1 www.misec.net; 127.0.0.1 safecomputing.umn.edu; 127.0.0.1 www.antirootkit.com; 127.0.0.1 www.greatis.com; 127.0.0.1 ar.answers.yahoo.com; 127.0.0.1 www.rootkit.com; 127.0.0.1 www.pctools.com; 127.0.0.1 www.pcsupportadvisor.com; 127.0.0.1 www.resplendence.com; 127.0.0.1 www.personal.psu.edu; 127.0.0.1 foro.ethek.com; 127.0.0.1 vil.nail.comm; 127.0.0.1 search.mcafee.com; 127.0.0.1 wwww.mcafee.com; 127.0.0.1 download.nai.com; 127.0.0.1 wwww.experts-exchange.com; 127.0.0.1 www.bakunos.com; 127.0.0.1 www.darkclockers.com; 127.0.0.1 www.Merijn.org; 127.0.0.1 www.spywareinfo.com; 127.0.0.1 www.spybot.info; 127.0.0.1 www.viruslist.com; 127.0.0.1 www.hijackthis.de; 127.0.0.1 www.f-secure.com; 127.0.0.1 forum.kaspersky.com; 127.0.0.1 majorgeeks.com; 127.0.0.1 www.avp.com; 127.0.0.1 www.virustotal.com; 127.0.0.1 www.sophos.com; 127.0.0.1 linhadefensiva.uol.com.br; 127.0.0.1 cmmings.cn; 127.0.0.1 www.sergiwa.com; 127.0.0.1 www.avg-antivirus.net; 127.0.0.1 www.kaspersky-labs.com; 127.0.0.1 www.kaspersky.com; 127.0.0.1 www.bleepingcomputer.com; 127.0.0.1 www.free.grisoft.com; 127.0.0.1 alerta-antivirus.inteco.es; 127.0.0.1 securityresponse.symantec.com; 127.0.0.1 www.analysis.seclab.tuwien.ac.at; 127.0.0.1 www.symantec.com; 127.0.0.1 www.kztechs.com; 127.0.0.1 ad-aware-se.uptodown.com; 127.0.0.1 liveupdate.symantecliveupdate.com; 127.0.0.1 liveupdate.symantec.com; 127.0.0.1 customer.symantec.com; 127.0.0.1 update.symantec.com; 127.0.0.1 www.box.net; 127.0.0.1 www.mcafee.com; 127.0.0.1 www.free.avg.com; 127.0.0.1 download.mcafee.com; 127.0.0.1 mast.mcafee.com; 127.0.0.1 www.tecno-soft.com; 127.0.0.1 ladooscuro.es; 127.0.0.1 ftp.drweb.com; 127.0.0.1 guru0.grisoft.cz; 127.0.0.1 guru1.grisoft.cz; 127.0.0.1 guru2.grisoft.cz; 127.0.0.1 guru3.grisoft.cz; 127.0.0.1 download.bleepingcomputer.com; 127.0.0.1 it.answers.yahoo.com; 127.0.0.1 guru4.grisoft.cz; 127.0.0.1 guru5.grisoft.cz; 127.0.0.1 www.virusspy.com; 127.0.0.1 www.download.f-secure.com; 127.0.0.1 www.malwareremoval.com; 127.0.0.1 forums.cnet.com; 127.0.0.1 hjt-data.trend-braintree.com; 127.0.0.1 www.pantip.com; 127.0.0.1 secubox.aldria.com; 127.0.0.1 www.forospyware.com; 127.0.0.1 www.manuelruvalcaba.com; 127.0.0.1 www.zonavirus.com; 127.0.0.1 www.siteadvisor.com; 127.0.0.1 blog.threatfire.com; 127.0.0.1 www.threatexpert.com; 127.0.0.1 blog.hispasec.com; 127.0.0.1 www.configurarequipos.com; 127.0.0.1 sosvirus.changelog.fr; 127.0.0.1 mailcenter.rising.com.cn; 127.0.0.1 mailcenter.rising.com; 127.0.0.1 www.rising.com.cn; 127.0.0.1 www.rising.com; 127.0.0.1 www.babooforum.com.br; 127.0.0.1 www.runscanner.net; 127.0.0.1 sosvirus.changelog.fr; 127.0.0.1 upload.changelog.fr; 127.0.0.1 www.raymond.cc; 127.0.0.1 changelog.fr; 127.0.0.1 www.pcentraide.com; 127.0.0.1 atazita.blogspot.com; 127.0.0.1 www.thinkpad.cn; 127.0.0.1 www.final4ever.com; 127.0.0.1 files.filefont.com; 127.0.0.1 www.infos-du-net.com; 127.0.0.1 www.trendsecure.com; 127.0.0.1 forum.hardware.fr; 127.0.0.1 www.utilidades-utiles.comwww.spychecker.com; 127.0.0.1 www.geekstogo.com; 127.0.0.1 forums.maddoktor2.com; 127.0.0.1 www.smokey-services.eu; 127.0.0.1 www.clubic.com; 127.0.0.1 www.linhadefensiva.org; 127.0.0.1 download.sysinternals.com; 127.0.0.1 www.pcguide.com; 127.0.0.1 www.thetechguide.com; 127.0.0.1 www.ozzu.com; 127.0.0.1 www.changedetection.com; 127.0.0.1 espanol.groups.yahoo.com; 127.0.0.1 community.thaiware.com; 127.0.0.1 www.avpclub.ddns.info; 127.0.0.1 www.offensivecomputing.net; 127.0.0.1 www.grisoft.com; 127.0.0.1 boardreader.com; 127.0.0.1 www.guiadohardware.net; 127.0.0.1 www.msnvirusremoval.com; 127.0.0.1 www.cisrt.org; 127.0.0.1 fixmyim.com; 127.0.0.1 samroeng.hi5.com; 127.0.0.1 foro.elhacker.net; 127.0.0.1 www.daboweb.com; 127.0.0.1 service1.symantec.com; 127.0.0.1 forums.techguy.org; 127.0.0.1 www.incodesolutions.com; 127.0.0.1 hijackthis.download3000.com; 127.0.0.1 www.cybertechhelp.com; 127.0.0.1 www.superdicas.com.br; 127.0.0.1 www.51nb.com; 127.0.0.1 downloads.andymanchesta.com; 127.0.0.1 andymanchesta.com; 127.0.0.1 info.prevx.com; 127.0.0.1 aknow.prevx.com; 127.0.0.1 www.zonavirus.com; 127.0.0.1 securitywonks.net; 127.0.0.1 www.lavasoft.com; 127.0.0.1 www.virscan.org; 127.0.0.1 www.eeload.com; 127.0.0.1 down.www.kingsoft.com; 127.0.0.1 www.file.net; 127.0.0.1 onecare.live.com; 127.0.0.1 mvps.org; 127.0.0.1 www.laneros.com; 127.0.0.1 www.housecall.trendmicro.com; 127.0.0.1 www.avast.com; 127.0.0.1 www.free.avg.com; 127.0.0.1 www.onlinescan.avast.com; 127.0.0.1 www.ewido.net; 127.0.0.1 www.trucoswindows.net; 127.0.0.1 www.futurenow.bitdefender.com; 127.0.0.1 www.bitdefender.com; 127.0.0.1 www.f-prot.com; 127.0.0.1 www.trendsecure.com; 127.0.0.1 security.symantec.com; 127.0.0.1 oldtimer.geekstogo.com; 127.0.0.1 www.avira.com; 127.0.0.1 www.eset.com; 127.0.0.1 www.free.avg.com; 127.0.0.1 www.free-av.com; 127.0.0.1 kr.ahnlab.com; 127.0.0.1 www.eset.com; 127.0.0.1 forospyware.com; 127.0.0.1 thejokerx.blogspot.com; 127.0.0.1 www.2-spyware.com; 127.0.0.1 www.antivir.es; 127.0.0.1 www.prevx.com; 127.0.0.1 www.ikarus.net; 127.0.0.1 bbs.s-sos.net; 127.0.0.1 www.housecall.trendmicro.com; 127.0.0.1 www.superdicas.com.br; 127.0.0.1 www.forums.majorgeeks.com; 127.0.0.1 www.castlecops.com; 127.0.0.1 www.virusspy.com; 127.0.0.1 andymanchesta.com; 127.0.0.1 www.kaspersky.es; 127.0.0.1 subs.geekstogo.com; 127.0.0.1 www.trendmicro.com; 127.0.0.1 www.fortinet.com; 127.0.0.1 www.safer-networking.org; 127.0.0.1 www.fortiguardcenter.com; 127.0.0.1 www.dougknox.com; 127.0.0.1 www.vsantivirus.com; 127.0.0.1 www.firewallguide.com; 127.0.0.1 www.auditmypc.com; 127.0.0.1 www.spywaredb.com; 127.0.0.1 www.mxttchina.com; 127.0.0.1 www.ziggamza.net; 127.0.0.1 www.forospyware.es; 127.0.0.1 www.antivirus.comodo.com; 127.0.0.1 www.spywareterminator.com; 127.0.0.1 www.eradicatespyware.net; 127.0.0.1 www.freespywareremoval.info; 127.0.0.1 www.personalfirewall.comodo.com; 127.0.0.1 www.clamav.net; 127.0.0.1 www.antivirus.about.com; 127.0.0.1 www.pandasecurity.com; 127.0.0.1 www.webphand.com; 127.0.0.1 mx.answers.yahoo.com; 127.0.0.1 www.securitywonks.net; 127.0.0.1 www.sandboxie.com; 127.0.0.1 www.clamwin.com; 127.0.0.1 www.cwsandbox.org; 127.0.0.1 www.ca.com; 127.0.0.1 www.arswp.com; 127.0.0.1 es.answers.yahoo.com; 127.0.0.1 www.trucoswindows.es; 127.0.0.1 www.networkworld.com; 127.0.0.1 www.cddchiangmai.net; 127.0.0.1 www.threatexpert.com; 127.0.0.1 www.norman.com; 127.0.0.1 espanol.answers.yahoo.com; 127.0.0.1 www.tallemu.com; 127.0.0.1 virscan.org; 127.0.0.1 www.viruschief.com; 127.0.0.1 scanner.virus.org; 127.0.0.1 www.hijackthis.de; 127.0.0.1 housecall65.trendmicro.com; 127.0.0.1 www.guiadohardware.net; 127.0.0.1 hjt.networktechs.com; 127.0.0.1 www.techsupportforum.com; 127.0.0.1 www.whatthetech.com; 127.0.0.1 www.soccersuck.com; 127.0.0.1 www.pcentraide.com; 127.0.0.1 comunidad.wilkinsonpc.com.co; 127.0.0.1 forum.piriform.com; 127.0.0.1 www.tweaksforgeeks.com; 127.0.0.1 www.daniweb.com; 127.0.0.1 www.geekstogo.com; 127.0.0.1 es.answers.yahoo.com; 127.0.0.1 www.techsupportforum.com; 127.0.0.1 www.pchell.com; 127.0.0.1 www.spyany.com; 127.0.0.1 forums.techguy.org; 127.0.0.1 www.experts-exchange.com; 127.0.0.1 www.wikio.es; 127.0.0.1 www.pandasecurity.com; 127.0.0.1 forums.devshed.com; 127.0.0.1 forum.tweaks.com; 127.0.0.1 www.wilderssecurity.com; 127.0.0.1 www.techspot.com; 127.0.0.1 www.thecomputerpitstop.com; 127.0.0.1 es.wasalive.com; 127.0.0.1 secunia.com; 127.0.0.1 es.kioskea.net; 127.0.0.1 www.taringa.net; 127.0.0.1 www.cyberdefender.com; 127.0.0.1 www.feedage.com; 127.0.0.1 new.taringa.net; 127.0.0.1 forum.zazana.com; 127.0.0.1 forum.clubedohardware.com.br; 127.0.0.1 www.computing.net; 127.0.0.1 discussions.virtualdr.com; 127.0.0.1 forum.securitycadets.com; 127.0.0.1 www.techimo.com; 127.0.0.1 13iii.com; 127.0.0.1 www.dicasweb.com.br; 127.0.0.1 www.infosecpodcast.com; 127.0.0.1 www.usbcleaner.cn; 127.0.0.1 www.net-security.org; 127.0.0.1 www.bleedingthreats.net; 127.0.0.1 acs.pandasoftware.com; 127.0.0.1 www.funkytoad.com; 127.0.0.1 www.360safe.cn; 127.0.0.1 www.360safe.com; 127.0.0.1 bbs.360safe.cn; 127.0.0.1 bbs.360safe.com; 127.0.0.1 codehard.wordpress.com; 127.0.0.1 forum.clubedohardware.com.br; 127.0.0.1 www.360.cn; 127.0.0.1 www.360.com; 127.0.0.1 bbs.360safe.cn; 127.0.0.1 bbs.360safe.com; 127.0.0.1 www.forospyware.es; 127.0.0.1 p3dev.taringa.net; 127.0.0.1 www.precisesecurity.com; 127.0.0.1 baike.360.cn; 127.0.0.1 baike.360.com; 127.0.0.1 kaba.360.cn; 127.0.0.1 kaba.360.com; 127.0.0.1 deckard.geekstogo.com; 127.0.0.1 www.taringa.net; 127.0.0.1 forums.comodo.com; 127.0.0.1 www.mvps.org; 127.0.0.1 down.360safe.cn; 127.0.0.1 down.360safe.com; 127.0.0.1 x.360safe.com; 127.0.0.1 dl.360safe.com; 127.0.0.1 ftp.drweb.com; 127.0.0.1 www.hotshare.net; 127.0.0.1 es.wasalive.com; 127.0.0.1 support.cmclab.net; 127.0.0.1 updatem.360safe.com; 127.0.0.1 updatem.360safe.cn; 127.0.0.1 update.360safe.cn; 127.0.0.1 update.360safe.com; 127.0.0.1 www.utilidades-utiles.com; 127.0.0.1 forum.kaspersky.com; 127.0.0.1 bbs.duba.net; 127.0.0.1 www.duba.net; 127.0.0.1 zhidao.baidu.com; 127.0.0.1 hi.baidu.com; 127.0.0.1 www.drweb.com.es; 127.0.0.1 msncleaner.softonic.com; 127.0.0.1 www.javacoolsoftware.com; 127.0.0.1 file.ikaka.com; 127.0.0.1 file.ikaka.cn; 127.0.0.1 bbs.ikaka.com; 127.0.0.1 zhidao.ikaka.com; 127.0.0.1 www.eset-la.com; 127.0.0.1 www.eset-la.com; 127.0.0.1 software-files.download.com; 127.0.0.1 www.ikaka.com; 127.0.0.1 www.ikaka.cn; 127.0.0.1 bbs.cfan.com.cn; 127.0.0.1 www.cfan.com.cn; 127.0.0.1 www.pandasecurity.com; 127.0.0.1 es.mcafee.com; 127.0.0.1 downloads.malwarebytes.org; 127.0.0.1 bbs.kafan.cn; 127.0.0.1 bbs.kafan.com; 127.0.0.1 bbs.kpfans.com; 127.0.0.1 bbs.taisha.org; 127.0.0.1 www.manuelruvalcaba.com; 127.0.0.1 support.f-secure.com; 127.0.0.1 bbs.winzheng.com; 127.0.0.1 alerta-antivirus.inteco.es; 127.0.0.1 foros.zonavirus.com; 127.0.0.1 alerta-antivirus.red.es; 127.0.0.1 www.zonavirus.com; 127.0.0.1 www.malwarebytes.org; 127.0.0.1 www.commentcamarche.net; 127.0.0.1 www.ewido.net; 127.0.0.1 www.infospyware.com; 127.0.0.1 www.bitdefender.es; 127.0.0.1 housecall.trendmicro.com; 127.0.0.1 foros.toxico-pc.com; 127.0.0.1 www.d-a-l.com; 127.0.0.1 www.beartai.com; 127.0.0.1 www.emsisoft.de; 127.0.0.1 www.securitynewsportal.com Backdoor Viene aperta la seguente porta: – %SYSDIR% \wbem\wmiclisv.exe sulla porta TCP 23860 con lo scopo di procurarsi un server HTTP. Varie Anti debugging Verifica se è presente uno dei seguenti file: • \\.\SICE • \\.\SIWVID • \\.\NTICE Tecnologia Rootkit Nasconde il seguente: – Il proprio processo Metodo utilizzato: • Nascosto dalle Windows API Dettagli del file Software di compressione: Per complicarne l'individuazione e ridurre la dimensione del file, viene compresso con un software di compressione.
Descrizione inserita da Petre Galan su venerdì 12 febbraio 2010 Descrizione aggiornata da Petre Galan su venerdì 12 febbraio 2010
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