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Trojan.Inject3.34781
Added to the Dr.Web virus database:
2020-02-13
Virus description added:
2020-02-16
Technical Information
To ensure autorun and distribution
Changes the following executable system files
Malicious functions
To complicate detection of its presence in the operating system,
blocks the following features:
deletes volume shadow copies.
Executes the following
'<SYSTEM32>\net.exe' stop "audioendpointbuilder" /y
'<SYSTEM32>\net.exe' stop "samss" /y
Injects code into
the following system processes:
Modifies file system
Creates the following files
<Current directory>\iuphyco.exe
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\appli...
%ALLUSERSPROFILE%\application data\adobe\arm\reader_15.007.20033\readerdcmanifest.msi
%ALLUSERSPROFILE%\application data\application data\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\docum...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\micro...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\oracl...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\start...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\event viewer...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\assistance\c...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\documents\my music\sam...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\documents\my pictures\...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\officesoftwa...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\search\data\...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\user account...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\windows\devi...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\windows\powe...
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\windows defe...
%ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\windows nt\m...
%ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab
%ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp
%PROGRAMDATA%\microsoft\crypto\rsa\machinekeys\08e575673cce10c72090304839888e02_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
%TEMP%\ryukreadme.html
D:\ryukreadme.html
D:\$recycle.bin\ryukreadme.html
D:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\ryukreadme.html
C:\ryukreadme.html
C:\documents and settings\ryukreadme.html
%ALLUSERSPROFILE%\ryukreadme.html
%ALLUSERSPROFILE%\adobe\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\reader_15.007.20033\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\reader_15.008.20082\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\s\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\s\10428\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\{291aa914-a987-4ce9-bd63-ac0a92d435e5}\ryukreadme.html
%ALLUSERSPROFILE%\adobe\setup\ryukreadme.html
%ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\ryukreadme.html
%ALLUSERSPROFILE%\adobe\arm\s\armmanifest.msi
%ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\netframework...
Moves the following files
from %ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab to %ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab.ryk
from %ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi to %ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi.ryk
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\appli... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\appli...
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\docum... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\docum...
from %ALLUSERSPROFILE%\adobe\arm\s\armmanifest.msi to %ALLUSERSPROFILE%\adobe\arm\s\armmanifest.msi.ryk
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\micro... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\micro...
from %ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp to %ALLUSERSPROFILE%\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp.ryk
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\oracl... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\application data\oracl...
from %ALLUSERSPROFILE%\application data\application data\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp to %ALLUSERSPROFILE%\application data\application data\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp.ryk
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\assistance\c... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\assistance\c...
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\documents\my pictures\... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\documents\my pictures\...
from %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\documents\my music\sam... to %ALLUSERSPROFILE%\application data\application data\application data\application data\application data\application data\application data\application data\application data\documents\my music\sam...
Network activity
UDP
'<LOCALNET>.54.1':7
'22#.0.0.22':7
'22#.0.0.252':7
'23#.#55.255.250':7
Miscellaneous
Creates and executes the following
'<Current directory>\iuphyco.exe' 8 LAN
'<Current directory>\iuphyco.exe' 8 LAN' (with hidden window)
'<SYSTEM32>\net.exe' stop "audioendpointbuilder" /y' (with hidden window)
'<SYSTEM32>\net.exe' stop "samss" /y' (with hidden window)
'<SYSTEM32>\icacls.exe' "A:\*" /grant Everyone:F /T /C /Q' (with hidden window)
'<SYSTEM32>\icacls.exe' "C:\*" /grant Everyone:F /T /C /Q' (with hidden window)
'<SYSTEM32>\icacls.exe' "D:\*" /grant Everyone:F /T /C /Q' (with hidden window)
'<SYSTEM32>\icacls.exe' "E:\*" /grant Everyone:F /T /C /Q' (with hidden window)
'<SYSTEM32>\icacls.exe' "<Drive name for removable media>:\*" /grant Everyone:F /T /C /Q' (with hidden window)
'<SYSTEM32>\cmd.exe' /c "WMIC.exe shadowcopy delet"' (with hidden window)
'<SYSTEM32>\vssadmin.exe' Delete Shadows /all /quiet' (with hidden window)
'<SYSTEM32>\bcdedit.exe' /set {default} recoveryenabled No & bcdedit /set {default}' (with hidden window)
'<SYSTEM32>\cmd.exe' /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "<SYSTEM32>\Dwm.exe" /f' (with hidden window)
'<SYSTEM32>\cmd.exe' /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "<Full path to file>" /f' (with hidden window)
'<SYSTEM32>\cmd.exe' /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "<Current directory>\iUPHycO.exe" /f' (with hidden window)
Executes the following
'<SYSTEM32>\net1.exe' stop "audioendpointbuilder" /y
'<SYSTEM32>\net1.exe' stop "samss" /y
'<SYSTEM32>\icacls.exe' "A:\*" /grant Everyone:F /T /C /Q
'<SYSTEM32>\icacls.exe' "C:\*" /grant Everyone:F /T /C /Q
'<SYSTEM32>\icacls.exe' "D:\*" /grant Everyone:F /T /C /Q
'<SYSTEM32>\icacls.exe' "E:\*" /grant Everyone:F /T /C /Q
'<SYSTEM32>\icacls.exe' "<Drive name for removable media>:\*" /grant Everyone:F /T /C /Q
'<SYSTEM32>\cmd.exe' /c "WMIC.exe shadowcopy delet"
'<SYSTEM32>\cmd.exe' /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "<SYSTEM32>\Dwm.exe" /f
'<SYSTEM32>\cmd.exe' /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "<Full path to file>" /f
'<SYSTEM32>\cmd.exe' /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "<Current directory>\iUPHycO.exe" /f
'<SYSTEM32>\wbem\wmic.exe' shadowcopy delet
Curing recommendations
Windows
macOS
Linux
Android
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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