1/9 Ransom.Win32.WHITERABBIT.YACAET trendmicro.com/vinfo/us/threat-encyclopedia/malware/Ransom.Win32.WHITERABBIT.YACAET  Analysis by: Bren Matthew Ebriega Threat Type: Ransomware Destructiveness: No Encrypted: Yes In the wild: Yes   OVERVIEW Infection Channel: Downloaded from the Internet This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It drops files as ransom note. It avoids encrypting files with the following file extensions.   TECHNICAL DETAILS Arrival Details This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. Installation This Ransomware drops the following files: {Malware Directory}\{Filename from argument} → If -l was used. It adds the following processes: https://www.trendmicro.com/vinfo/us/threat-encyclopedia/malware/Ransom.Win32.WHITERABBIT.YACAET 2/9 cmd /c choice /t 9 /d y & attrib -h {Malware Filepath}\{Malware Filename} & del {Malware Filepath}\{Malware Filename} It adds the following mutexes to ensure that only one of its copies runs at any one time: Global\{GUID} Process Termination This Ransomware terminates the following services if found on the affected system: msexchange* msex-change* 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 stc _ raw _ agent vsnapvss veeamtransportsvc veeamdeploymentservice veeamnfssvc 3/9 pdvfsservice backupexecvssprovider backupexeca-gentaccelerator backupexecagentbrowser backupexecdivecimediaservice backupexecjobengine backupexecmanagementservice backupexecrpcservice acrsch2svc acronisagent casad2dwebsvc caarcupdatesvc vmwp back xchange ackup acronis enterprise acrsch antivirus bedbg dcagent epsecurity epupdate eraser esgshkernel fa_scheduler iisadmin imap4 mbam endpoint afee mcshield task mfemms mfevtp mms msdts exchange ntrt pdvf pop3 4/9 report resvc sacsvr savadmin sams sdrsvc sepmaster monitor smcinst smcservice smtp snac swi_ ccsf truekey tmlisten ui0detect w3s wrsvc netmsmq ekrn ehttpsrvn It terminates the following processes if found running in the affected system's memory: *sqlserver* agntsvc avp backup calc cntaosmgr dbeng dbeng50 dbsnmp ekrn encsvc eshasrv excel firefox firefoxconfig infopath isqlplussvc 5/9 kavf klnagent mbamtray mfefire msaccess msdtc mspub mydesktop mydesktopqos mydesktopservice mysql* notepad ntrtscan ocautoupds ocomm ocssd onenote oracle outlook pccntmon powerpnt sofos sqbcoreservice sqbcoreser-vice sql* steam synctime tbirdconfig thebat thunderbird tmlisten veeam virtual visio vmcomp vmcompute vmms vmsp vmwp wbengine winword word 6/9 wordpad xchange xfssvccon zoolz Other Details This Ransomware does the following: It requires to be executed with the password/passphrase in order to proceed with its malicious routine: KissMe It will encrypt files found in the following set of drives in the affected system: Fixed Drives Removable Drives Network Drives and Resources It accepts the following parameters: -p {password/passphrase} -f {file to encrypt} -l {logfile} -t {day}-{month}-{year} {hour}:{minute} → Use 24 Hour Format and 2 Digits Ransomware Routine This Ransomware avoids encrypting files with the following strings in their file name: *\desktop.ini *\thumbs.db It avoids encrypting files with the following strings in their file path: c:\filesource\* c:\windows\* c:\programdata\* %User Temp%\* *:\sysvol\* *:\netlogon\* *:\windows\* *:\programfiles\* *:\program files (x86)\* *:\program files (x64)\* 7/9 (Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).) It appends the following extension to the file name of the encrypted files: .scrypt It drops the following file(s) as ransom note: {Encrypted Directory}\{Filename}.scrypt.txt It avoids encrypting files with the following file extensions: *.scrypt.txt *.scrypt *.exe *.dll *.lnk *.iso *.msi *.sys *.inf 8/9   SOLUTION Step 1 Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:   Troj.Win32.TRX.XXPE50FFF052 Step 2 Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers. Step 3 Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step. Step 4 Search and delete these files [ Learn More ] There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result. {Malware Directory}\{Filename from argument} {Encrypted Directory}\{Filename}.scrypt.txt Step 5 Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.WHITERABBIT.YACAET. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information: Step 6 Restore encrypted files from backup. https://www.trendmicro.com/vinfo/us/security/definition/System-Restore 9/9 Did this description help? 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