Ransom.Win32.SODINOKIBI.THB
Ransom:Win32/Sodinokibi.DSB!MTB (MICROSOFT)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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
122,880 bytes
EXE
Yes
15 Mar 2021
Drops files, Encrypts files, Collects system information, Displays message/message boxes, Displays graphics/image
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:
- %User Temp%\{Random Characters}.bmp → used as wallpaper
(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 adds the following processes:
- bcdedit /set {current} safeboot network → if -smode parameter is used (Safe boot with networking)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- Global\8C39F091-3A8D-46F4-DBC5-DDA17B3C63C2
Autostart Technique
This Ransomware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
aDTFUAIa7j = {Malware Path}\{Malware Filename}.exe
Other System Modifications
This Ransomware adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
aCp = {Hex Values}
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
wuHK = {Hex Values}
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
zhF9j = {Hex Values}
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
JLKwyr = {Hex Values}
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
jKxaK5W = {Appended Extension}
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
imnaqv4N = {Hex Values}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
*AstraZeneca = {Malware Path}\{Malware Filename}.exe → if -smode parameter is used
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
*franceisshit = bcdedit /deletevalue {current} safeboot → if -smode parameter is used (turns off safe mode)
It changes the desktop wallpaper by modifying the following registry entries:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %User Temp%\{Random Characters}.bmp
It sets the system's desktop wallpaper to the following image:
Process Termination
This Ransomware terminates the following services if found on the affected system:
- ADSync
- Altaro.Agent.exe
- Altaro.DedupService.exe
- Altaro.HyperV.WAN.RemoteService.exe
- Altaro.OffsiteServer.Service.exe
- Altaro.OffsiteServer.UI.Service.exe
- Altaro.SubAgent.exe
- Altaro.SubAgent.N2.exe
- Altaro.UI.Service.exe
- AltiBack
- AltiCTProxy
- AltiFTPUploader
- AltiPhoneServ
- ALTIVRM
- Amsp
- AUService
- AzureADConnectAgentUpdater
- AzureADConnectAuthenticationAgent
- AzureADConnectHealthSyncInsights
- AzureADConnectHealthSyncMonitor
- backup
- BackupExecAgentAccelerator
- bedbg
- Code42Service
- ds_agent
- ds_monitor
- ds_notifier
- DsSvc
- HuntressAgent
- HuntressUpdater
- KACHIPS906995744173948
- KAENDCHIPS906995744173948
- KaseyaAgent
- KaseyaAgentEndpoint
- KAVFS
- kavfsscs
- klnagent
- LTService
- LTSvcMon
- macmnsvc
- masvc
- MBAMService
- McAfeeFramework
- memtas
- mepocs
- mfemms
- mfevtp
- mfewc
- Microsoft.exchange.store.worker.exe
- MsDtsServer110
- MsDtsServer120
- MsDtsServer130
- msseces
- MSSQL$HPWJA
- MSSQL$MSGPMR
- MSSQL$QM
- MSSQL$SQLEXPRESS
- MSSQL$SQLEXPRESSADV
- MSSQLFDLauncher
- MSSQLFDLauncher$SQLEXPRESS
- MSSQLFDLauncher$TESTBACKUP02DEV
- MSSQLLaunchpad$SQLEXPRESS
- MSSQLSERVER
- MSSQLServerADHelper100
- MSSQLServerOLAPService
- MSSQLTESTBACKUP02DEV
- MySQL
- mysqld
- ntrtscan
- ofcservice
- ProtectedStorage
- psqlWGE
- ReportServer
- Sage 100c Advanced 2017 (9917)
- Sage 100cloud Advanced 2020 (9920)
- Sage.NA.AT_AU.Service
- SAVAdminService
- SAVService
- SBAMSvc
- SntpService
- sophos
- Sophos AutoUpdate Service
- Sophos Clean Service
- Sophos Device Control Service
- Sophos Endpoint Defense Service
- Sophos File Scanner Service
- Sophos Health Service
- Sophos MCS Agent
- Sophos MCS Client
- Sophos Safestore Service
- Sophos System Protection Service
- Sophos Web Control Service
- SophosFIM
- sophossps
- sppsvc
- sql
- SQLAgent$MSGPMR
- SQLAgent$SQLEXPRESS
- SQLBrowser
- SQLEXPRESSADV
- SQLServer Analysis Services (MSSQLSERVER)
- SQLServer Integration Services 12.0
- SQLServer Reporting Services (MSSQLSERVER)
- SQLSERVERAGENT
- sqlservr
- SQLTELEMETRY
- SQLTELEMETRY$MSGPMR
- SQLTELEMETRY$SQLEXPRESS
- SQLWriter
- SSASTELEMETRY
- SSISTELEMETRY130
- StorageCraft ImageReady
- StorageCraft Raw Agent
- StorageCraft Shadow Copy Provider
- svc$
- svcGenericHost
- swi_filter
- swi_service
- TeamViewer
- Telemetryserver
- ThreadLocker
- TMBMServer
- TmCCSF
- tmlisten
- veeam
- VeeamDeploymentService
- VeeamDeploySvc
- VeeamEndpointBackupSvc
- VeeamHvIntegrationSvc
- VeeamMountSvc
- VeeamNFSSvc
- VeeamTransportSvc
- VipreAAPSvc
- ViprePPLSvc
- vss
- VSS
It terminates the following processes if found running in the affected system's memory:
- agntsvc
- AmitiAvSrv
- avgadmsv
- BackupAgent
- BackupExtender
- BackupMaint
- BackupUpdater
- CarboniteUI
- ccSetMgr
- ccSvcHst
- dbeng50
- dbsnmp
- DLOAdminSvcu
- dlomaintsvcu
- encsvc
- excel
- firefox
- infopath
- isqlplussvc
- kavfs
- kavfsscs
- kavfswp
- klnagent
- lmibackupvssservice
- LogmeInBackupService
- Microsoft.exchange.store.worker.exe
- msaccess
- mspub
- mydesktopqos
- mydesktopservice
- NSCTOP
- ocautoupds
- ocomm
- ocssd
- onenote
- oracle
- outlook
- powerpnt
- Rtvscan
- Sage.NA.AT_AU.SysTray
- ShadowProtectSvc
- Smc
- SPBBCSvc
- sqbcoreservice
- sql
- steam
- synctime
- tbirdconfig
- thebat
- thunderbird
- TSSchBkpService
- visio
- winword
- wordpad
- xfssvccon
Information Theft
This Ransomware gathers the following data:
- Computer name
- User name
- Workgroup
- Processor
- Operating System
- System Architecture
Other Details
This Ransomware adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
It does the following:
- It will terminate itself if the affected system's keyboard layout is any of the following:
- Arabic-Syria
- Armenian-Armenia
- Azerbaijani (Cyrillic)-Azerbaijan
- Azerbaijani (Latin)-Azerbaijan
- Belarusian
- Georgian-Georgia
- Kazakh-Kazakhstan
- Kyrgyz-Kyrgyzstan
- Romanian-Moldova
- Russian
- Russian-Moldova
- Syriac - Syria
- Tajikistan - Tajik (Cyrillic)
- Tatar-Russia
- Turkmen-Turkmenistan
- Ukrainian
- Uzbek (Cyrillic) - Uzbekistan
- Uzbek (Latin)-Uzbekistan
- It checks if its privilege level is on SYSTEM level. If it is, it will impersonate the user that ran the first explorer.exe it has found.
- It wipes the contents of the following folder:
- backup
- It searches for files to encrypt in remote drives, fixed drives, removable drives, and network resources.
It accepts the following parameters:
- -silent → skips the following:
- Termination of blacklisted processes and services
- Removal of shadow copies
- -path → specifies directory to be encrypted
- -nolocal → avoids encrypting fixed and removable drives
- -nolan → avoids encrypting network and shared drives
- -fast → fast encryption mode
- -smode → executes ransomware routine on safe mode
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file name:
- autorun.inf
- boot.ini
- bootfont.bin
- bootsect.bak
- desktop.ini
- iconcache.db
- ntldr
- ntuser.dat
- ntuser.dat.log
- ntuser.ini
- thumbs.db
It avoids encrypting files found in the following folders:
- $recycle.bin
- $windows.~bt
- $windows.~ws
- appdata
- application data
- boot
- intel
- mozilla
- msocache
- perflogs
- program files
- program files (x86)
- programdata
- system volume information
- tor browser
- windows
- windows.old
It appends the following extension to the file name of the encrypted files:
- {Original Filename}.{Original File Extension}.{Random Characters}
It drops the following file(s) as ransom note:
- {Encrypted Directory}\{Appended Extension}-readme.txt
It avoids encrypting files with the following file extensions:
- .386
- .adv
- .ani
- .bat
- .bin
- .cab
- .cmd
- .com
- .cpl
- .cur
- .deskthemepack
- .diagcab
- .diagcfg
- .diagpkg
- .dll
- .drv
- .exe
- .hlp
- .hta
- .icl
- .icns
- .ico
- .ics
- .idx
- .key
- .ldf
- .lnk
- .lock
- .mod
- .mpa
- .msc
- .msi
- .msp
- .msstyles
- .msu
- .nls
- .nomedia
- .ocx
- .prf
- .ps1
- .rom
- .rtp
- .scr
- .shs
- .spl
- .sys
- .theme
- .themepack
- .wpx
SOLUTION
9.800
16.630.03
01 Apr 2021
16.631.00
02 Apr 2021
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.XXPE50FFF042
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 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- aDTFUAIa7j = {Malware Path}\{Malware Filename}.exe
- aDTFUAIa7j = {Malware Path}\{Malware Filename}.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
- aCp = {Hex Values}
- aCp = {Hex Values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
- wuHK = {Hex Values}
- wuHK = {Hex Values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
- zhF9j = {Hex Values}
- zhF9j = {Hex Values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
- JLKwyr = {Hex Values}
- JLKwyr = {Hex Values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
- jKxaK5W = {Appended Extension}
- jKxaK5W = {Appended Extension}
- In HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
- imnaqv4N = {Hex Values}
- imnaqv4N = {Hex Values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
- *AstraZeneca = {Malware Path}\{Malware Filename}.exe
- *AstraZeneca = {Malware Path}\{Malware Filename}.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
- *franceisshit = bcdedit /deletevalue {current} safeboot
- *franceisshit = bcdedit /deletevalue {current} safeboot
Step 6
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_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
Step 7
Search and delete this file
- %User Temp%\{Random Characters}.bmp
- {Encrypted Directory}\{Appended Extension}-readme.txt
Step 8
Reset your Desktop properties
Step 9
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom.Win32.SODINOKIBI.THB. 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
Restore encrypted files from backup.
Did this description help? Tell us how we did.