"name":"Report from - http://chuongdong.com//reverse%20engineering/2021/01/03/BabukRansomware/ (1609871056)",
"content":"htmlGlobalsitetag(gtag.js)-GoogleAnalyticsReverseEngineering\u00b703Jan2021#BabukRansomware\n\n##Overview\n\nThisismyreportforthenewBabukRansomwarethatrecentlyappearsatthebeginningof2021.\n\nSincethisisthefirstdetectionofthismalwareinthewild,it\u2019snotsurprisingthatBabukisnotobsfuscatedatall.Overall,it\u2019saprettystandardransomwarethatutilizessomeofthenewtechniquesweseesuchasmulti-threadingencryptionaswellasabusingtheWindowsRestartManagersimilartoContiandREvil.\n\nForencryptingscheme,BabukusesitsownimplementationofSHA256hashing,ChaCha8encryption,andElliptic-curveDiffie\u2013Hellman(ECDH)keygenerationandexchangealgorithmtoprotectitskeysandencryptfiles.Likemanyransomwarethatcamebefore,italsohastheabilitytospreaditsencryptionthroughenumeratingtheavailablenetworkresources.\n\n*Figure1:RaidForumBabukleak*\n\n##IOCS\n\nBabukRansomwarecomesintheformofa32-bit*.exe*file.\n\n**MD5**:e10713a4a5f635767dcd54d609bed977\n\n**SHA256**:8203c2f00ecd3ae960cb3247a7d7bfb35e55c38939607c85dbdb5c92f0495fa9\n\n**Sample**:https://bazaar.abuse.ch/sample/8203c2f00ecd3ae960cb3247a7d7bfb35e55c38939607c85dbdb5c92f0495fa9/\n\n *Figure 2: VirusTotal result*\n\n ## Ransom Note\n\n *Figure 3: Babuk\u2019s ransom note*\n\n *Figure 4: Babuk\u2019s Website*\n\n (Pretty unprofessional from the Babuk team since they did not remove the chat log between them and Sabelt)\n\n ## Code Analysis\n\n ### Command-line Arguments\n\n Babuk can work with or without command line paramters. If no parameter is given, it\u2019s restricted to only encrypting the local machines.\n\n *Figure 5: Argument parsing*\n\n If a parameter is given, it will process these arguments upon execution and behave accordingly.\n\n CMD Args Functionality -lanfirst Same as no parameter given, encrypting locally -lansecond Encrypting network shares after encrypting locally -nolan Same as no parameter given, encrypting locally ### Terminating Services\n\n Babuk\u2019s authors hard-coded a list of services to be closed before encryption.\n\n Before terminating a service, Babuk will calls **EnumDependentServicesA** to retrieve the name and status of each service that depends on that specified service.\n\n It will then call **ControlService** with the control code *SERVICE\\_CONTROL\\_STOP* to stop them before terminating the main service the same way.\n\n *Figure 6: Terminating serivces*\n\n Here is the list of services to be closed.\n\n vss, sql, svc$, memtas, mepocs, sophos, veeam, backup, GxVss, GxBlr, GxFWD, GxCVD, GxCIMgr, DefWatch, ccEvtMgr, ccSetMgr, SavRoam, RTVscan, QBFCService, QBIDPService, Intuit.QuickBooks.FCS, QBCFMonitorService, YooBackup, YooIT, zhudongfangyu, sophos, stc\\_raw\\_agent, VSNAPVSS, VeeamTransportSvc, VeeamDeploymentService, VeeamNFSSvc, veeam, PDVFSService, BackupExecVSSProvider, BackupExecAgentAccelerator, BackupExecAgentBrowser, BackupExecDiveciMediaService, BackupExecJobEngine, BackupExecManagementService, BackupExecRPCService, AcrSch2Svc, AcronisAgent, CASAD2DWebSvc, CAARCUpdateSvc, ### Terminating Running Processes\n\n The author also hard-coded a list of processes to be closed.\n\n Using calls to **CreateToolhelp32Snapshot**, **Process32FirstW**, and **Process32NextW** to examine all of the processes running on the system, Babuk can loop through and look for processes needed to be closed. Upon finding any, it will call **TerminateProcess** to terminate it.\n\n *Figure 7: Terminating processes*\n\n Here is the list of processes to be closed.\n\n sql.exe, oracle.exe, ocssd.exe, dbsnmp.exe, synctime.exe, agntsvc.exe, isqlplussvc.exe, xfssvccon.exe, mydesktopservice.exe, ocautoupds.exe, encsvc.exe, firefox.exe, tbirdconfig.exe, mydesktopqos.exe, ocomm.exe, dbeng50.exe, sqbcoreservice.exe, excel.exe, infopath.exe, msaccess.exe, mspub.exe, onenote.exe, outlook.exe, powerpnt.exe, steam.exe, thebat.exe, thunderbird.exe, visio.exe, winwo
