Ransom.Win64.RAPID.A
Trojan:Win32/Rapid.A!MTB (MICROSOFT)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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.
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 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:
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.XXPE50FFF034
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
Restart in Safe Mode
Step 5
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- HKEY_CURRENT_USER\Software\EncryptUID
- HKEY_CURRENT_USER\Software\EncryptKeys
Step 6
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\EncryptUID
- local_uid = {Random 14 Characters}
- local_uid = {Random 14 Characters}
- In HKEY_CURRENT_USER\Software\EncryptKeys
- local_enc_private_key = {Hex Values}
- local_enc_private_key = {Hex Values}
- In HKEY_CURRENT_USER\Software\EncryptKeys
- local_enc_private_key_len = {Hex Values}
- local_enc_private_key_len = {Hex Values}
- In HKEY_CURRENT_USER\Software\EncryptKeys
- local_public_key = {Hex Values}
- local_public_key = {Hex Values}
- In HKEY_CURRENT_USER\Software\EncryptKeys
- local_public_key_len = {Hex Values}
- local_public_key_len = {Hex Values}
Step 7
Search and delete these folders
- %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}
Step 8
Search and delete this file
- %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\norapid.exe
- %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\rapidrecovery.txt
- %Application Data%\rapidrecovery.txt
- {Encrypted Directory}\userket.dat
- %Application Data%\{A7DBD80C-410D-4C87-99F9-B19C0DA21BF1}\kakdela.bmp
- %Application Data%\deletex.bat
- {Encrypted Directory}\!DECRYPT_FILES.txt
Step 9
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom.Win64.RAPID.A. 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 this Knowledge Base page for more information.
Step 10
Reset your Desktop properties
Step 11
Restore encrypted files from backup.
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