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Trojan.Siggen18.36597
Added to the Dr.Web virus database:
2022-08-18
Virus description added:
2022-08-19
Technical Information
To ensure autorun and distribution
Sets the following service settings
[<HKLM>\System\CurrentControlSet\Services\BSW_CHOCO_DO_UPDATE] 'ImagePath' = '"%ProgramFiles(x86)%\bit4finance\BSW-ChocoPowerUpdate\services\BSW_CHOCO_DO_UPDATE.exe"'
[<HKLM>\System\CurrentControlSet\Services\BSW_CHOCO_GET_UPDATE] 'ImagePath' = '"%ProgramFiles(x86)%\bit4finance\BSW-ChocoPowerUpdate\services\BSW_CHOCO_GET_UPDATE.exe"'
Creates the following services
'BSW_CHOCO_DO_UPDATE' "%ProgramFiles(x86)%\bit4finance\BSW-ChocoPowerUpdate\services\BSW_CHOCO_DO_UPDATE.exe"
'BSW_CHOCO_DO_UPDATE' %ProgramFiles(x86)%\bit4finance\BSW-ChocoPowerUpdate\services\BSW_CHOCO_DO_UPDATE.exe
'BSW_CHOCO_GET_UPDATE' "%ProgramFiles(x86)%\bit4finance\BSW-ChocoPowerUpdate\services\BSW_CHOCO_GET_UPDATE.exe"
'BSW_CHOCO_GET_UPDATE' %ProgramFiles(x86)%\bit4finance\BSW-ChocoPowerUpdate\services\BSW_CHOCO_GET_UPDATE.exe
Malicious functions
Downloads and executes
https://community.chocolatey.org/install.ps1
Modifies file system
Creates the following files
%TEMP%\autd47d.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\res\building150x150_1.35.gif
%TEMP%\autd810.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\res\loading70x70_1.35.gif
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\bsw-chocopowerupdate\bsw-chocopowerupdate.lnk
C:\users\public\desktop\bsw-chocopowerupdate.lnk
%WINDIR%\temp\bsw_choco_do_update.exe.log
%TEMP%\~uprgdku.tmp
%TEMP%\~pvwsngq.tmp
%TEMP%\~qdsmpmf.tmp
%TEMP%\~drrhqiq.tmp
%TEMP%\~qmsrcbg.tmp
%TEMP%\~ngiottr.tmp
%TEMP%\~dcabpuj.tmp
%TEMP%\~robtsbo.tmp
%TEMP%\autd80f.tmp
%WINDIR%\temp\bsw_choco_get_update.exe.log
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\res\bit4finance_logo.jpg
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\servicesgrantaccess.exe
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bsw-chocopowerupdate.exe
%TEMP%\autd588.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\bsw_choco_do_update.exe
%TEMP%\autd634.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\bsw_choco_get_update.exe
%TEMP%\autd72f.tmp
%TEMP%\autd7ad.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\res\application.ico
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\ps\choco_do-update.ps1
%TEMP%\autd7ae.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\ps\choco_get-update.ps1
%TEMP%\autd7be.tmp
%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe
%TEMP%\autd7ee.tmp
%TEMP%\autd7ff.tmp
%TEMP%\bsw-chocopowerupdate_17_08_2022__45-16.log
Deletes the following files
%TEMP%\autd47d.tmp
%TEMP%\autd588.tmp
%TEMP%\autd634.tmp
%TEMP%\autd72f.tmp
%TEMP%\autd7ad.tmp
%TEMP%\autd7ae.tmp
%TEMP%\autd7be.tmp
%TEMP%\autd7ee.tmp
%TEMP%\autd7ff.tmp
%TEMP%\autd80f.tmp
%TEMP%\autd810.tmp
Network activity
Connects to
'co######y.chocolatey.org':443
TCP
Other
'co######y.chocolatey.org':443
UDP
DNS ASK co######y.chocolatey.org
Miscellaneous
Creates and executes the following
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\bsw_choco_do_update.exe' -i
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\bsw_choco_get_update.exe' -i
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\servicesgrantaccess.exe'
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~qdsmpmf.tmp /errorlog=%TEMP%\~uprgdku.tmp /service BSW_CHOCO_DO_UPDATE /grant=Benutzer=QSTOP
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~qmsrcbg.tmp /errorlog=%TEMP%\~drrhqiq.tmp /service BSW_CHOCO_DO_UPDATE /grant=Users=QSTOP
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~dcabpuj.tmp /errorlog=%TEMP%\~ngiottr.tmp /service BSW_CHOCO_GET_UPDATE /grant=Benutzer=QSTOP
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~pvwsngq.tmp /errorlog=%TEMP%\~robtsbo.tmp /service BSW_CHOCO_GET_UPDATE /grant=Users=QSTOP
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install microsoft-teams.install -y"' (with hidden window)
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install zoom -y"' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~dcabpuj.tmp /errorlog=%TEMP%\~ngiottr.tmp /service BSW_CHOCO_GET_UPDATE /grant=Benutzer=QSTOP' (with hidden window)
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor ...' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~pvwsngq.tmp /errorlog=%TEMP%\~robtsbo.tmp /service BSW_CHOCO_GET_UPDATE /grant=Users=QSTOP' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\servicesgrantaccess.exe' ' (with hidden window)
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install gotomeeting -y"' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~qdsmpmf.tmp /errorlog=%TEMP%\~uprgdku.tmp /service BSW_CHOCO_DO_UPDATE /grant=Benutzer=QSTOP' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\bin\subinacl.exe' /outputlog=%TEMP%\~qmsrcbg.tmp /errorlog=%TEMP%\~drrhqiq.tmp /service BSW_CHOCO_DO_UPDATE /grant=Users=QSTOP' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\bsw_choco_get_update.exe' -i' (with hidden window)
'%ProgramFiles(x86)%\bit4finance\bsw-chocopowerupdate\services\bsw_choco_do_update.exe' -i' (with hidden window)
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco upgrade chocolatey"' (with hidden window)
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install webex-meetings -y --ignore-checksums"' (with hidden window)
Executes the following
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco upgrade chocolatey"
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install zoom -y"
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install microsoft-teams.install -y"
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install gotomeeting -y"
'%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass -Command "choco install webex-meetings -y --ignore-checksums"
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
Descargue Dr.Web para Android
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Renovación de la demo a través de AppGallery/Google Pay
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