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Trojan.PWS.Siggen2.22785
Added to the Dr.Web virus database:
2019-07-17
Virus description added:
2019-07-19
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Local Security Authority Subsystem Service' = '"%APPDATA%\Microsoft\Windows\lsass.exe" *'
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Injects code into
the following system processes:
%WINDIR%\syswow64\cmd.exe
<SYSTEM32>\conhost.exe
the following user processes:
Searches for registry branches where third party applications store passwords
[<HKCU>\Software\Martin Prikryl\WinSCP 2\Sessions]
Reads files which store third party applications passwords
%APPDATA%\mozilla\firefox\profiles.ini
<LS_APPDATA>\google\chrome\user data\default\cookies
<LS_APPDATA>\google\chrome\user data\default\web data
Network activity
Connects to
TCP
HTTP GET requests
http://www.ms###csi.com/ncsi.txt
http://pr####t-01252505.ml/azor.exe
http://ge###tool.com/
http://ip##pi.com/json
http://ip##gger.ru/1c6647.html
HTTP POST requests
http://te######vice012505.ru.com/
http://pr####t-01252505.ml/
http://vi####nage101.tk/webaz.php
http://in#####mroulette.com/api/check.get
http://in#####mroulette.com/api/gate.get?p1############################################
UDP
DNS ASK pr####t-01242505.tk
DNS ASK al######service012505.ru
DNS ASK vs######service012505.ru
DNS ASK ne######service012505.ru
DNS ASK bi######service012505.ru
DNS ASK te######vice01shop2505.ru
DNS ASK te######vice01info2505.ru
DNS ASK te######vice01plus2505.ru
DNS ASK te######vice01club2505.ru
DNS ASK te######vice01torg2505.ru
DNS ASK te######vice01land2505.ru
DNS ASK te######vice01life2505.ru
DNS ASK te######vice01blog2505.ru
DNS ASK me######-service012505.ru
DNS ASK in######-service012505.ru
DNS ASK be######-service012505.ru
DNS ASK sh######-service012505.ru
DNS ASK ku######-service012505.ru
DNS ASK pr######-service012505.ru
DNS ASK cl######-service012505.ru
DNS ASK my######ervice01242505.ru
DNS ASK ru######ervice01242505.ru
DNS ASK te######vice01stroy2505.ru
DNS ASK te######vice01forum2505.ru
DNS ASK su######t-service012505.ru
DNS ASK pr######service01242505.ru
DNS ASK pr####t-01252505.ml
DNS ASK vi####nage101.tk
DNS ASK ge###tool.com
DNS ASK ip##pi.com
DNS ASK to######service012505.ru
DNS ASK in#####mroulette.com
DNS ASK mo######service012505.ru
DNS ASK te#####rvice012505.host
DNS ASK te######vice012505.ru.com
DNS ASK te#####rvice012505.pw
DNS ASK te#####rvice012505.com
DNS ASK te#####rvice012505.site
DNS ASK te######vice012505.store
DNS ASK te#####rvice01242505.ru
DNS ASK my#####service012505.ru
DNS ASK te#####rvice012505.su
DNS ASK te#####rvice012505.info
DNS ASK te#####rvice012505.net
DNS ASK te#####rvice012505.tech
DNS ASK te######vice012505.online
DNS ASK ru#####service012505.ru
DNS ASK te######vice01dom2505.ru
DNS ASK te######vice012505.website
DNS ASK te#####rvice012505.xyz
DNS ASK te######vice01pro2505.ru
DNS ASK te######vice01rus2505.ru
DNS ASK te#####rvice012505.eu
DNS ASK te######vice012505.press
DNS ASK pr######service012505.ru
DNS ASK ru######service012505.ru
DNS ASK te#######ice012505.net2505.ru
DNS ASK te######vice012505.space
DNS ASK do######service012505.ru
DNS ASK mi######service012505.ru
DNS ASK te#######ice012505.org2505.ru
DNS ASK te#######ice012505.pp2505.ru
DNS ASK te#####rvice012505.pro
DNS ASK te#####rvice012505.fun
DNS ASK ip##gger.ru
Miscellaneous
Creates and executes the following
'%TEMP%\4817.tmp.exe'
'%TEMP%\4bd1.tmp.exe'
'%TEMP%\4e53.tmp.exe'
'%TEMP%\54bc.tmp.exe'
'%TEMP%\5ba3.tmp.exe'
'%APPDATA%\microsoft\windows\lsass.exe' *
'%WINDIR%\syswow64\cmd.exe' /e:on /c md "%APPDATA%\Microsoft\Windows" & copy "%TEMP%\5BA3.tmp.exe" "%APPDATA%\Microsoft\Windows\lsass.exe" & reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Local Security ...' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /c for /l %x in (1,1,999) do ( ping -n 3 127.1 & del "%TEMP%\5BA3.tmp.exe" & if not exist "%TEMP%\5BA3.tmp.exe" exit )' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup -keepversions:0' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete backup' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet' (with hidden window)
Executes the following
'%WINDIR%\syswow64\explorer.exe'
'%WINDIR%\explorer.exe'
'%WINDIR%\syswow64\dllhost.exe'
'%WINDIR%\syswow64\cmd.exe' /e:on /c md "%APPDATA%\Microsoft\Windows" & copy "%TEMP%\5BA3.tmp.exe" "%APPDATA%\Microsoft\Windows\lsass.exe" & reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Local Security ...
'%WINDIR%\syswow64\reg.exe' add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Local Security Authority Subsystem Service" /t REG_SZ /F /D "\"%APPDATA%\Microsoft\Windows\lsass.exe\" *"
'%WINDIR%\syswow64\cmd.exe' /c for /l %x in (1,1,999) do ( ping -n 3 127.1 & del "%TEMP%\5BA3.tmp.exe" & if not exist "%TEMP%\5BA3.tmp.exe" exit )
'%WINDIR%\syswow64\ping.exe' -n 3 127.1
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup -keepversions:0
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete backup
'%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete
'<SYSTEM32>\vssvc.exe'
'%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet
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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Todos los componentes de protección
Renovación de la demo a través de AppGallery/Google Pay
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