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Trojan.Siggen21.39771
Added to the Dr.Web virus database:
2023-10-12
Virus description added:
2024-03-30
Technical Information
To ensure autorun and distribution
Creates or modifies the following files
<SYSTEM32>\tasks\rlicmwhba6vzkzdhto
<SYSTEM32>\tasks\oracle corporation
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion:
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath @($env:UserProfile, $env:ProgramFiles) -Force
Executes the following
'%WINDIR%\syswow64\taskkill.exe' /im atom.exe /f
Modifies file system
Creates the following files
%TEMP%\nsp6f08.tmp
%ALLUSERSPROFILE%\avast software\icarus\logs\icarus.log
%ALLUSERSPROFILE%\avast software\icarus\settings\proxy.ini
%ALLUSERSPROFILE%\avast software\icarus\logs\sui.log.tmp.f9a5cb56-3f24-476e-a24a-cf07e4ea5d97
%ALLUSERSPROFILE%\avast software\icarus\logs\sui.log
%ALLUSERSPROFILE%\avast software\icarus\logs\report.log
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus_ui.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\icarus-info.xml
%ALLUSERSPROFILE%\avast software\icarus\logs\icarus.log.tmp.e640ded0-9b99-4b60-aa79-093158503be9
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\dump_process.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\setupui.cont
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus_rvrt.exe.lzma
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus_rvrt.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus_product.dll.lzma
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus_product.dll
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\product-info.xml
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\config.def
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\bug_report.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\product-def.xml
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\ecoo.edat
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\setupui.cont
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\02a9da8c-0397-47c5-bdee-b0779eb8a4d7
%APPDATA%\atom.exe
%APPDATA%\avast_secureline_setup.exe
%ALLUSERSPROFILE%\avast software\icarus\logs\sfx.log.tmp.0c61d7b4-3a12-4ca4-9452-ac028c22fae8
%ALLUSERSPROFILE%\avast software\icarus\logs\sfx.log
%ALLUSERSPROFILE%\{sg277p56-i3ft-gfbw-rlqgbxwdknek}\iexplore.exe
%APPDATA%\java.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\52a61e7e-168c-45c3-bdb7-c689b69229bf
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\product-info.xml
%APPDATA%\bypass.vbs
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\69555172-caac-47ad-8dc5-b10008525fcd
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\362a3b49-bdaa-41aa-bd03-8ef29f1180e0
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\icarus_ui.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\60f5e740-6962-4ce2-b953-e1d5106b1ab9
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\dump_process.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\dfd6ab9c-c691-4a84-8f0d-000a9a650d89
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\bug_report.exe
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\8c151ad2-2820-4fe4-926b-82d97cd8753d
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\product-def.xml
%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\icarus.exe
%TEMP%\mtvvzjyzcbje.xml
%APPDATA%\dialer_javaapps\jre1.8.0_341\bin\dialer_java.exe
Sets the 'hidden' attribute to the following files
%APPDATA%\bypass.vbs
%APPDATA%\atom.exe
%APPDATA%\avast_secureline_setup.exe
%APPDATA%\java.exe
Deletes the following files
Moves the following files
from %ALLUSERSPROFILE%\avast software\icarus\logs\sfx.log.tmp.0c61d7b4-3a12-4ca4-9452-ac028c22fae8 to %ALLUSERSPROFILE%\avast software\icarus\logs\sfx.log
from %ALLUSERSPROFILE%\avast software\icarus\logs\icarus.log.tmp.e640ded0-9b99-4b60-aa79-093158503be9 to %ALLUSERSPROFILE%\avast software\icarus\logs\icarus.log
from %ALLUSERSPROFILE%\avast software\icarus\logs\sui.log.tmp.f9a5cb56-3f24-476e-a24a-cf07e4ea5d97 to %ALLUSERSPROFILE%\avast software\icarus\logs\sui.log
Modifies the HOSTS file.
Network activity
Connects to
'an#####cs.ff.avast.com':443
'pk#.goog':80
'ho####.avcdn.net':443
'sh#####d.ff.avast.com':443
'si######gion.duckdns.org':80
TCP
HTTP GET requests
http://pk#.goog/gsr1/gsr1.crt
Other
'an#####cs.ff.avast.com':443
'ho####.avcdn.net':443
'sh#####d.ff.avast.com':443
UDP
DNS ASK an#####cs.ff.avast.com
DNS ASK pk#.goog
DNS ASK ho####.avcdn.net
DNS ASK sh#####d.ff.avast.com
DNS ASK si######gion.duckdns.org
Miscellaneous
Searches for the following windows
ClassName: '' WindowName: ''
Creates and executes the following
'%APPDATA%\atom.exe'
'%APPDATA%\avast_secureline_setup.exe'
'%ALLUSERSPROFILE%\{sg277p56-i3ft-gfbw-rlqgbxwdknek}\iexplore.exe'
'%APPDATA%\java.exe'
'%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\icarus.exe' /icarus-info-path:%WINDIR%\Temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\icarus-info.xml /install /sssid:2312
'%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\icarus_ui.exe' /sssid:2312 /er_master:master_ep_3be07f55-9900-4cca-bbff-bdf7b691186a /er_ui:ui_ep_d50824cf-2b9a-41c9-be10-53ca710795c7
'%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus.exe' /sssid:2312 /er_master:master_ep_3be07f55-9900-4cca-bbff-bdf7b691186a /er_ui:ui_ep_d50824cf-2b9a-41c9-be10-53ca710795c7 /er_slave:avast-vpn_slave_ep_fe3d589c-381f-449b-9963-3008ee7f55ec /slave:...
'%ALLUSERSPROFILE%\{sg277p56-i3ft-gfbw-rlqgbxwdknek}\iexplore.exe' ' (with hidden window)
'%WINDIR%\syswow64\schtasks.exe' /Create /SC MINUTE /MO 15 /TN "RLICMWHBA6VZKZDHTO" /TR "%ALLUSERSPROFILE%\{SG277P56-I3FT-GFBW-RLQGBXWDKNEK}\iexplore.exe" /F' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /c taskkill /im atom.exe /f & erase ГCГёГЅ\user\AppData\Roaming\atom.exe & exit' (with hidden window)
'%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\common\icarus_ui.exe' /sssid:2312 /er_master:master_ep_3be07f55-9900-4cca-bbff-bdf7b691186a /er_ui:ui_ep_d50824cf-2b9a-41c9-be10-53ca710795c7' (with hidden window)
'%WINDIR%\temp\asw-4df353b7-bc9c-4c31-95a3-bcbb86b4187e\avast-vpn\icarus.exe' /sssid:2312 /er_master:master_ep_3be07f55-9900-4cca-bbff-bdf7b691186a /er_ui:ui_ep_d50824cf-2b9a-41c9-be10-53ca710795c7 /er_slave:avast-vpn_slave_ep_fe3d589c-381f-449b-9963-3008ee7f55ec /slave:...' (with hidden window)
Executes the following
'%WINDIR%\syswow64\schtasks.exe' /Create /SC MINUTE /MO 15 /TN "RLICMWHBA6VZKZDHTO" /TR "%ALLUSERSPROFILE%\{SG277P56-I3FT-GFBW-RLQGBXWDKNEK}\iexplore.exe" /F
'<SYSTEM32>\powercfg.exe' /x -standby-timeout-ac 0
'<SYSTEM32>\cmd.exe' /c choice /C Y /N /D Y /T 3 & Del "%APPDATA%\java.exe"
'<SYSTEM32>\schtasks.exe' /run /tn "Oracle Corporation"
'<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-dc 0
'<SYSTEM32>\schtasks.exe' /create /f /tn "Oracle Corporation" /xml "%TEMP%\mtvvzjyzcbje.xml"
'<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-ac 0
'<SYSTEM32>\schtasks.exe' /delete /f /tn "Oracle Corporation"
'<SYSTEM32>\cmd.exe' /c powercfg /x -hibernate-timeout-ac 0 & powercfg /x -hibernate-timeout-dc 0 & powercfg /x -standby-timeout-ac 0 & powercfg /x -standby-timeout-dc 0
'<SYSTEM32>\sc.exe' stop dosvc
'<SYSTEM32>\sc.exe' stop bits
'<SYSTEM32>\sc.exe' stop wuauserv
'<SYSTEM32>\sc.exe' stop WaaSMedicSvc
'<SYSTEM32>\sc.exe' stop UsoSvc
'<SYSTEM32>\cmd.exe' /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc
'%WINDIR%\syswow64\cmd.exe' /c taskkill /im atom.exe /f & erase ГCГёГЅ\user\AppData\Roaming\atom.exe & exit
'<SYSTEM32>\choice.exe' /C Y /N /D Y /T 3
'<SYSTEM32>\powercfg.exe' /x -standby-timeout-dc 0
Uses NTFS alternate data streams
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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