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Trojan.Siggen30.27207
Added to the Dr.Web virus database:
2024-12-16
Virus description added:
2024-12-18
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'winlogon' = '"<Current directory>\winlogon.exe"'
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'winlogon' = '"<Current directory>\winlogon.exe"'
[HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "<Current directory>\winlogon.exe"'
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'lsm' = '"%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe"'
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'lsm' = '"%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe"'
[HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "<Current directory>\winlogon.exe", "%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe"'
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'wininit' = '"C:\Users\Default\Videos\wininit.exe"'
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'wininit' = '"C:\Users\Default\Videos\wininit.exe"'
[HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "<Current directory>\winlogon.exe", "%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe", "C:\Users\Default\Vid...
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'lsass' = '"<Current directory>\lsass.exe"'
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'lsass' = '"<Current directory>\lsass.exe"'
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'lsm' = '"%ProgramFiles(x86)%\Windows Portable Devices\lsm.exe"'
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'lsm' = '"%ProgramFiles(x86)%\Windows Portable Devices\lsm.exe"'
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>' = '"<Full path to file>"'
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>' = '"<Full path to file>"'
Creates or modifies the following files
<SYSTEM32>\tasks\winlogonw
<SYSTEM32>\tasks\winlogon
<SYSTEM32>\tasks\lsml
<SYSTEM32>\tasks\wininitw
<SYSTEM32>\tasks\wininit
<SYSTEM32>\tasks\lsm
<SYSTEM32>\tasks\lsass
<SYSTEM32>\tasks\lsassl
<SYSTEM32>\tasks\<File name>j
<SYSTEM32>\tasks\<File name>
Modifies file system
Creates the following files
<Current directory>\e003a034089fed
%HOMEPATH%\desktop\lqnepjwk.log
%HOMEPATH%\desktop\jnvecqwo.log
nul
%TEMP%\0xzjmlj2rt.bat
%TEMP%\f3v4d94spe
%TEMP%\nmdblcbc.out
%TEMP%\nmdblcbc.cmdline
%TEMP%\nmdblcbc.0.cs
%HOMEPATH%\desktop\telzwnbv.log
<Current directory>\cc11b995f2a76d
%ProgramFiles(x86)%\windows mail\en-us\101b941d020240
%ProgramFiles(x86)%\windows mail\en-us\lsm.exe
C:\users\default\videos\56085415360792
C:\users\default\videos\wininit.exe
<Current directory>\6203df4a6bafc7
<Current directory>\lsass.exe
%ProgramFiles(x86)%\windows portable devices\101b941d020240
%ProgramFiles(x86)%\windows portable devices\lsm.exe
<Current directory>\winlogon.exe
%HOMEPATH%\desktop\kacjmumn.log
Deletes the following files
%TEMP%\nmdblcbc.0.cs
%TEMP%\nmdblcbc.cmdline
%TEMP%\nmdblcbc.out
%TEMP%\f3v4d94spe
Moves the following files
from %ProgramFiles%\microsoft office\office14\bcssync.exe to %ProgramFiles%\microsoft office\office14\bcssync.exe.exe
Network activity
Connects to
'58#####m.nyashteam.ru':80
TCP
HTTP POST requests
http://58#####m.nyashteam.ru/linepipepacketgeoDefaultTempcdnUploads.php
UDP
DNS ASK 58#####m.nyashteam.ru
Miscellaneous
Creates and executes the following
'%ProgramFiles(x86)%\windows portable devices\lsm.exe'
Executes the following
'<SYSTEM32>\schtasks.exe' /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'<Current directory>\winlogon.exe'" /f
'<SYSTEM32>\cmd.exe' /C "%TEMP%\0xZJMlJ2RT.bat"
'<SYSTEM32>\schtasks.exe' /create /tn "<File name>j" /sc MINUTE /mo 9 /tr "'<Full path to file>'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "<File name>" /sc ONLOGON /tr "'<Full path to file>'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "<File name>j" /sc MINUTE /mo 14 /tr "'<Full path to file>'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsml" /sc MINUTE /mo 12 /tr "'%ProgramFiles(x86)%\Windows Portable Devices\lsm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsm" /sc ONLOGON /tr "'%ProgramFiles(x86)%\Windows Portable Devices\lsm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsml" /sc MINUTE /mo 12 /tr "'%ProgramFiles(x86)%\Windows Portable Devices\lsm.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'<Current directory>\lsass.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsass" /sc ONLOGON /tr "'<Current directory>\lsass.exe'" /rl HIGHEST /f
'<SYSTEM32>\chcp.com' 65001
'<SYSTEM32>\schtasks.exe' /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'<Current directory>\lsass.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Default\Videos\wininit.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Users\Default\Videos\wininit.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsml" /sc MINUTE /mo 14 /tr "'%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsm" /sc ONLOGON /tr "'%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsml" /sc MINUTE /mo 6 /tr "'%ProgramFiles(x86)%\Windows Mail\en-US\lsm.exe'" /f
'%WINDIR%\microsoft.net\framework64\v4.0.30319\csc.exe' /noconfig /fullpaths @"%TEMP%\nmdblcbc.cmdline"
'<SYSTEM32>\schtasks.exe' /create /tn "winlogonw" /sc MINUTE /mo 7 /tr "'<Current directory>\winlogon.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "winlogon" /sc ONLOGON /tr "'<Current directory>\winlogon.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Videos\wininit.exe'" /rl HIGHEST /f
'<SYSTEM32>\ping.exe' -n 10 localhost
'%WINDIR%\microsoft.net\framework64\v4.0.30319\csc.exe' /noconfig /fullpaths @"%TEMP%\nmdblcbc.cmdline"' (with hidden window)
'<SYSTEM32>\cmd.exe' /C "%TEMP%\0xZJMlJ2RT.bat"' (with hidden window)
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.
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