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Trojan.DownLoader34.56858

Added to the Dr.Web virus database: 2020-09-29

Virus description added:

Technical Information

Modifies file system
Creates the following files
  • %WINDIR%\temp\asw.2add6cb3a77b0934\ecoo.edat
  • %WINDIR%\temp\asw.df5a1865d50940e8\setup.def
  • %WINDIR%\temp\asw.df5a1865d50940e8\stats.ini.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\avbugreport_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\avdump_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\avdump_x86_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\offertool_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\sbr_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\asw975354f1e61ebe3c.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\asw2bab08b70d9f6fcc.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\servers.def.lkg
  • %WINDIR%\temp\asw.df5a1865d50940e8\uat_2672.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswf9a8e2d82b89d7fd.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswf6d71e1c71cf21d0.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswf041a235eedc2313.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\uat_920.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\program.def
  • %WINDIR%\temp\asw.df5a1865d50940e8\part-jrog2-f.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\part-vps_windows-20092707.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\vps.def
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\gcapi_16013508492392.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\gcapi_16013508492684.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswd9e203629d53119e.tmp
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswc68012fa4a97e5d2.tmp
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.2dbec926-dc44-4206-a646-a5376cb01ad5
  • %WINDIR%\temp\asw.df5a1865d50940e8\config.ini
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.c5aafbb2-a777-432c-955f-1a9ef10d4e40
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • %WINDIR%\temp\asw.df5a1865d50940e8\servers.def
  • %WINDIR%\temp\asw.df5a1865d50940e8\config.def
  • %WINDIR%\temp\asw.df5a1865d50940e8\config.def.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\instup.exe
  • %WINDIR%\temp\asw.df5a1865d50940e8\instcont_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\instup.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\instup_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\part-jrog2-69d.vpx
  • %WINDIR%\temp\asw.2add6cb3a77b0934\avast_free_antivirus_setup_online_x64.exe
  • %WINDIR%\temp\asw.df5a1865d50940e8\part-prg_ais-14070979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\part-vps_windows-20090100.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\prod-pgm.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\prod-vps.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\servers.def.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\htmlayout.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\setgui_x64_ais-979.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\uat.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\uat64.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\uata64.vpx
  • %WINDIR%\temp\asw.df5a1865d50940e8\config.def.new
  • %WINDIR%\temp\asw.df5a1865d50940e8\part-setup_ais-14070979.vpx
  • C:\users\public\documents\aswoffertool.exe
  • C:\users\public\documents\gcapi_16013508501220.dll
Deletes the following files
  • %WINDIR%\temp\asw.df5a1865d50940e8\uat_2672.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\uat_920.dll
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\gcapi_16013508492392.dll
  • C:\users\public\documents\gcapi_16013508501220.dll
  • C:\users\public\documents\aswoffertool.exe
  • %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\gcapi_16013508492684.dll
Moves the following files
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.c5aafbb2-a777-432c-955f-1a9ef10d4e40 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • from %WINDIR%\temp\asw.2add6cb3a77b0934\ecoo.edat to %WINDIR%\temp\asw.df5a1865d50940e8\cookie.bin
  • from %WINDIR%\temp\asw.df5a1865d50940e8\config.def.new to %WINDIR%\temp\asw.df5a1865d50940e8\config.def
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.2dbec926-dc44-4206-a646-a5376cb01ad5 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • from %WINDIR%\temp\asw.df5a1865d50940e8\stats.ini.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\stats.ini
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\asw975354f1e61ebe3c.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\avbugreport.exe
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\asw2bab08b70d9f6fcc.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\avdump.exe
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswf9a8e2d82b89d7fd.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\instup.exe
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswd9e203629d53119e.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\instup.dll
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswc68012fa4a97e5d2.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswoffertool.exe
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswf6d71e1c71cf21d0.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\sbr.exe
  • from %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswf041a235eedc2313.tmp to %WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\htmlayout.dll
Substitutes the following files
  • %WINDIR%\temp\asw.df5a1865d50940e8\config.def.new
Network activity
TCP
HTTP GET requests
  • http://ia####.u.avast.com/iavs9x/avast_free_antivirus_setup_online_x64.exe
  • http://www.go#####analytics.com/collect?ai#######################################################################################################################################################...
  • http://h4######.iavs9x.u.avast.com/iavs9x/servers.def.vpx
  • http://y8######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://y8######.iavs9x.u.avast.com/iavs9x/avbugreport_x64_ais-979.vpx
  • http://y8######.iavs9x.u.avast.com/iavs9x/avdump_x64_ais-979.vpx
  • http://y8######.iavs9x.u.avast.com/iavs9x/avdump_x86_ais-979.vpx
  • http://y8######.iavs9x.u.avast.com/iavs9x/offertool_x64_ais-979.vpx
  • http://y8######.iavs9x.u.avast.com/iavs9x/sbr_x64_ais-979.vpx
  • http://s1######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://s1######.vps18tiny.u.avcdn.net/vps18tiny/prod-vps.vpx
  • http://s1######.vps18tiny.u.avcdn.net/vps18tiny/part-jrog2-f.vpx
  • http://s1######.vps18tiny.u.avcdn.net/vps18tiny/part-vps_windows-20092707.vpx
HTTP POST requests
  • http://www.go#####analytics.com/collect
  • http://v7#####.stats.avast.com/cgi-bin/iavsevents.cgi
  • 'v7#####.stats.avast.com':443
  • 'sh#####d.ff.avast.com':443
  • 'al########nse-dealer.ff.avast.com':443
  • 'al#####qs.ff.avast.com':443
  • 'ss#.####le-analytics.com':443
    • UDP
    • DNS ASK go#####analytics.com
    • DNS ASK b7######.vps18tiny.u.avcdn.net
    • DNS ASK ss#.####le-analytics.com
    • DNS ASK 2.###l.ntp.org
    • DNS ASK 1.###l.ntp.org
    • DNS ASK 0.###l.ntp.org
    • DNS ASK al#####qs.ff.avast.com
    • DNS ASK al########nse-dealer.ff.avast.com
    • DNS ASK s1######.vps18tiny.u.avcdn.net
    • DNS ASK s-#####tiny.avcdn.net
    • DNS ASK r3######.vps18tiny.u.avcdn.net
    • DNS ASK l7######.vps18tiny.u.avcdn.net
    • DNS ASK r9######.iavs9x.u.avast.com
    • DNS ASK 3.###l.ntp.org
    • DNS ASK n2######.iavs9x.u.avast.com
    • DNS ASK b8######.iavs9x.u.avast.com
    • DNS ASK z4######.iavs9x.u.avast.com
    • DNS ASK y9######.iavs9x.u.avast.com
    • DNS ASK y8######.iavs9x.u.avast.com
    • DNS ASK s-####9x.avcdn.net
    • DNS ASK h4######.iavs9x.u.avast.com
    • DNS ASK sh#####d.ff.avast.com
    • DNS ASK v7#####.stats.avast.com
    • DNS ASK ia####.u.avast.com
    • DNS ASK s1######.iavs9x.u.avast.com
    • DNS ASK c3######.vps18tiny.u.avcdn.net
    • '0.###l.ntp.org':123
    • '2.###l.ntp.org':123
    • '3.###l.ntp.org':123
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\temp\asw.2add6cb3a77b0934\avast_free_antivirus_setup_online_x64.exe' /cookie:mmm_ava_001_999_e4i_m:brs_msft /ga_clientid:a8706199-fc5e-4708-b13c-b2eeab3b5c6b /edat_dir:%WINDIR%\Temp\asw.2add6cb3a77b0934
    • '%WINDIR%\temp\asw.df5a1865d50940e8\instup.exe' /sfx:lite /sfxstorage:%WINDIR%\Temp\asw.df5a1865d50940e8 /edition:1 /prod:ais /guid:927bcec4-9cd1-4318-8a74-705554df9c41 /ga_clientid:a8706199-fc5e-4708-b13c-b2eeab3b5c6b /cookie:mmm_ava_001_99...
    • '%WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\instup.exe' /sfx /sfxstorage:%WINDIR%\Temp\asw.df5a1865d50940e8 /edition:1 /prod:ais /guid:927bcec4-9cd1-4318-8a74-705554df9c41 /ga_clientid:a8706199-fc5e-4708-b13c-b2eeab3b5c6b /cookie:mmm_ava_001_999_e4i...
    • '%WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswoffertool.exe' -checkChrome -elevated
    • '%WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswoffertool.exe' -checkChromeReactivation -elevated -bc=AVFA
    • 'C:\users\public\documents\aswoffertool.exe' -checkChromeReactivation -bc=AVFA
    • '%WINDIR%\temp\asw.df5a1865d50940e8\new_14070979\aswoffertool.exe' -checkGToolbar -elevated

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    1. 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.
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      • 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);
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