Ransom.Win32.SODINOKIBI.YABGC

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 may be dropped by other malware.

It drops files as ransom note. It avoids encrypting files with the following file extensions.

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.

It may be dropped by the following malware:

• Trojan.Win32.SODINSTALL.YABGC

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 (Restart the machine to Safe Mode with networking)

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

• Global\{GUID}

Other System Modifications

This Ransomware adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
Ed7 = {Hex Values}

HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
QIeQ = {Hex Values}

HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
96Ia6 = {Hex Values}

HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
Ucr1RB = {Hex Values}

HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
wJWsTYE = {Appended Extension}

HKEY_LOCAL_MACHINE\SOFTWARE\BlackLivesMatter
JmfOBvhb = {Hex Values}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
*AstraZeneca = %Windows%\MsMpEng.exe (or %User Temp%\MsMpEng.exe, depending on what was successfully ran) → if -smode parameter is used

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
*MarineLePen = bcdedit /deletevalue {current} safeboot → if -smode parameter is used (Removes the machine from safe mode)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
AutoAdminLogon = 1 → if -smode parameter is used

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
DefaultUserName = {current user's username} → if -smode parameter is used

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
DefaultPassword = DTrump4ever → if -smode parameter is used

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:

• backup
• memtas
• mepocs
• sophos
• sql
• svc$
• veeam
• vss

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

• agntsvc
• dbeng50
• dbsnmp
• encsvc
• excel
• firefox
• infopath
• isqlplussvc
• msaccess
• mspub
• mydesktopqos
• mydesktopservice
• ocautoupds
• ocomm
• ocssd
• onenote
• oracle
• outlook
• powerpnt
• sqbcoreservice
• sql
• steam
• synctime
• tbirdconfig
• thebat
• thunderbird
• 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 Eastern
  • Azeri Cyrillic
  • Azeri Latin
  • Belarusian
  • Georgian
  • Kazakh
  • Kyrgyz Cyrillic
  • Romanian-Moldova
  • Russian
  • Russian-Moldova
  • Syriac
  • Tajik
  • Tatar
  • Turkmen
  • Ukranian
  • Uzbek Cyrillic
  • Uzbek Latin
• 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 does the following if -smode parameter is used:
  • It changes the current user's password to DTrump4ever
  • It enables automatic logon
  • It changes the default username to the current user's username
  • It changes the default password to DTrump4ever
• It shows the following error message if 2 or more instances of itself is running:
  

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
• google
• 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:

• .{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