Ransom.Win64.RAPID.A

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.

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 copies of itself into the affected system:

• %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\norapid.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It drops and executes the following files:

• {Encrypted Directory}\userkey.dat → contains the user's Personal-ID
• %Application Data%\deletex.bat → deletes specific files

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

• vssadmin.exe Delete Shadows /All /Quiet → deletes shadow copies
• bcdedit.exe /set {default} recoveryenabled No → disables automatic repair
• bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures → disables Windows error recovery
• wbadmin DELETE SYSTEMSTATEBACKUP → deletes the system state backups
• wmic SHADOWCOPY DELETE → deletes shadow copies
• vssadmin.exe resize shadowstorage /for={Drive Letter}: /on={Drive Letter}: /maxsize=401MB → resizes the maximum amount of storage space that can be used for shadow copy storage
• vssadmin.exe resize shadowstorage /for={Drive Letter}: /on={Drive Letter}: /maxsize=unbounded → resizes the maximum amount of storage space that can be used for shadow copy storage

It creates the following folders:

• %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• GLOBALCHETOTAMKAKDELA

Autostart Technique

This Ransomware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
HelloAV = %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\norapid.exe

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WelcomeBack = %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\rapidrecovery.txt

Other System Modifications

This Ransomware adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\EncryptUID
local_uid = {14 Random Characters}

HKEY_CURRENT_USER\Software\EncryptKeys
local_enc_private_key = {Hex Values}

HKEY_CURRENT_USER\Software\EncryptKeys
local_enc_private_key_len = {Hex Values}

HKEY_CURRENT_USER\Software\EncryptKeys
local_public_key = {Hex Values}

HKEY_CURRENT_USER\Software\EncryptKeys
local_public_key_len = {Hex Values}

It changes the desktop wallpaper by modifying the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\kakdela.bmp

It sets the system's desktop wallpaper to the following image:

• %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\kakdela.bmp
  

Process Termination

This Ransomware terminates the following services if found on the affected system:

• AVP18.0.0
• ekrn
• klbackupdisk
• klbackupflt
• klflt
• klhk
• KLIF
• klim6
• klkbdflt
• klmouflt
• klpd
• kltap
• KSDE1.0.0
• MsDtsServer100
• MsDtsServer130
• msftesql$SQLEXPRESS
• MSSQL
• MSSQL$OPTIMA
• MSSQL$PROGID
• MSSQL$VEEAMSQL2012
• MSSQL$WOLTERSKLUWER
• MSSQLFDLauncher
• MSSQLFDLauncher$OPTIMA
• MSSQLSERVER
• MSSQLServerADHelper100
• MSSQLServerOLAPService
• ntrtscan
• ofcservice
• postgresql-x64-9.4
• ReportServer
• ReportServer$OPTIMA
• SQLAgent
• SQLAgent$OPTIMA
• SQLAgent$PROGID
• SQLAgent$VEEAMSQL2012
• SQLAgent$WOLTERSKLUWER
• SQLBrowser
• SQLSERVERAGENT
• SQLTELEMETRY
• SQLTELEMETRY$HL
• SQLWriter
• SSISTELEMETRY130
• storflt
• TMBMServer
• TmCCSF
• TmFilter
• TMiCRCScanService
• tmlisten
• TMLWCSService
• TmPreFilter
• TmProxy
• TMSmartRelayService
• tmusa
• UniFi
• vmicguestinterface
• vmicheartbeat
• vmickvpexchange
• vmicrdv
• vmicshutdown
• vmictimesync
• vmicvss
• VSApiNt
• WRSVC

It terminates the following processes if found running in the affected system's memory:

• agntsvc.exe
• CMD.exe
• cmd.exe
• dbeng50.exe
• dbsnmp.exe
• encsvc.exe
• excel.exe
• fdhost.exe
• fdlauncher.exe
• firefoxconfig.exe
• infopath.exe
• isqlplussvc.exe
• msaccess.exe
• MsDtsSrvr.exe
• msftesql.exe
• msmdsrv.exe
• mspub.exe
• mydesktopqos.exe
• mydesktopservice.exe
• mysqld.exe
• mysqld-nt.exe
• mysqld-opt.exe
• ocautoupds.exe
• ocomm.exe
• ocssd.exe
• onenote.exe
• oracle.exe
• outlook.exe
• pg_ctl.exe
• postgres.exe
• powerpnt.exe
• ReportingServicesService.exe
• sqbcoreservice.exe
• SQLAGENT.EXE
• sqlagent.exe
• sqlbrowser.exe
• sqlceip.exe
• sqlservr.exe
• sqlwriter.exe
• Ssms.exe
• steam.exe
• synctime.exe
• taskmgr.exe
• tbirdconfig.exe
• thebat.exe
• thebat64.exe
• thunderbird.exe
• UniFi.exe
• visio.exe
• winword.exe
• wordpad.exe
• xfssvccon.exe

Other Details

This Ransomware adds the following registry keys:

HKEY_CURRENT_USER\Software\EncryptUID

HKEY_CURRENT_USER\Software\EncryptKeys

It renames encrypted files using the following names:

• {FileName}.cryptolocker

It does the following:

• It checks for the presence and lists the following AV products:
  
  • MsMpEng.exe → Windows Defender
  • ntrtscan.exe → Trend Micro Security
  • avp.exe → Kaspersky Endpoint Security
  • WRSA.exe → Webroot
  • egui.exe → ESET
  • AvastUI.exe → Avast
• It accepts or adds the following arguments to check its execution:
  
  • -nd
  • -net
  • -all → creates %Application Data%\deletex.bat
  • -del → creates %Application Data%\deletex.bat
• %Application Data%\deletex.bat deletes the following:
  
  • {Drive Letter}:\\*.VHD
  • {Drive Letter}:\\*.bac
  • {Drive Letter}:\\*.bak
  • {Drive Letter}:\\*.wbcat
  • {Drive Letter}:\\*.bkf
  • {Drive Letter}:\\Backup*.*
  • {Drive Letter}:\\*.set
  • {Drive Letter}:\\*.win
  • {Drive Letter}:\\*.dsk

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following scheduled tasks:

• Task Name: SvcSafeDataSt
  
  • Trigger: At log on of any user
  • Action: Starts a program → %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\norapid.exe
• Task Name: SvcSafeData
  
  • Trigger: Every Minute
  • Action: Starts a program → %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\norapid.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Ransomware Routine

This Ransomware drops the following file(s) as ransom note:

• %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\rapidrecovery.txt
• %Application Data%\rapidrecovery.txt
• {Encrypted Directory}\!DECRYPT_FILES.txt

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It leaves text files that serve as ransom notes containing the following text: