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Trojan.DownLoader34.55386

Added to the Dr.Web virus database: 2020-09-27

Virus description added:

Technical Information

Modifies file system
Creates the following files
  • %WINDIR%\temp\asw.5070e64d95d91ac1\ecoo.edat
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\setup.def
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\stats.ini.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\avbugreport_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\avdump_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\avdump_x86_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\offertool_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\sbr_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswa857ef00743a65ae.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw911a735fb9df8379.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\servers.def.lkg
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uat_2716.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw1304c0b37bb7a43d.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswd8233ce81beab573.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw3b8b6ed92d28ec4a.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uat_888.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\program.def
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\part-jrog2-d.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\part-vps_windows-20092505.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\vps.def
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\gcapi_16012671771624.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\gcapi_1601267177228.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw3c16638ae50e1622.tmp
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw099fb4ea9f7b2660.tmp
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.1cc2ec85-1d77-4310-8b22-672b94388ee6
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\config.ini
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.de83f694-27a0-4a93-99d7-c9ab76542d70
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\servers.def
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\config.def
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\config.def.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\instup.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\instup_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\part-jrog2-69d.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\part-prg_ais-14070979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\part-setup_ais-14070979.vpx
  • %WINDIR%\temp\asw.5070e64d95d91ac1\avast_free_antivirus_setup_online_x64.exe
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\part-vps_windows-20090100.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\prod-vps.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\servers.def.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\htmlayout.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\setgui_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uat.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uat64.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uata64.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\instup.exe
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\instcont_x64_ais-979.vpx
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\config.def.new
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\prod-pgm.vpx
  • C:\users\public\documents\aswoffertool.exe
  • C:\users\public\documents\gcapi_16012671782604.dll
Deletes the following files
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uat_2716.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\uat_888.dll
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\gcapi_16012671771624.dll
  • C:\users\public\documents\gcapi_16012671782604.dll
  • C:\users\public\documents\aswoffertool.exe
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\gcapi_1601267177228.dll
Moves the following files
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.de83f694-27a0-4a93-99d7-c9ab76542d70 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • from %WINDIR%\temp\asw.5070e64d95d91ac1\ecoo.edat to %WINDIR%\temp\asw.1ac8cb16336e0dd1\cookie.bin
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\config.def.new to %WINDIR%\temp\asw.1ac8cb16336e0dd1\config.def
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.1cc2ec85-1d77-4310-8b22-672b94388ee6 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\stats.ini.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\stats.ini
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswa857ef00743a65ae.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\avbugreport.exe
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw911a735fb9df8379.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\avdump.exe
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw1304c0b37bb7a43d.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\instup.exe
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw3c16638ae50e1622.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\instup.dll
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw099fb4ea9f7b2660.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswoffertool.exe
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswd8233ce81beab573.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\sbr.exe
  • from %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\asw3b8b6ed92d28ec4a.tmp to %WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\htmlayout.dll
Substitutes the following files
  • %WINDIR%\temp\asw.1ac8cb16336e0dd1\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://y9######.iavs9x.u.avast.com/iavs9x/servers.def.vpx
  • http://y9######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://y9######.iavs9x.u.avast.com/iavs9x/avbugreport_x64_ais-979.vpx
  • http://y9######.iavs9x.u.avast.com/iavs9x/avdump_x64_ais-979.vpx
  • http://y9######.iavs9x.u.avast.com/iavs9x/avdump_x86_ais-979.vpx
  • http://y9######.iavs9x.u.avast.com/iavs9x/offertool_x64_ais-979.vpx
  • http://y9######.iavs9x.u.avast.com/iavs9x/sbr_x64_ais-979.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://r4######.vps18tiny.u.avcdn.net/vps18tiny/prod-vps.vpx
  • http://r4######.vps18tiny.u.avcdn.net/vps18tiny/part-jrog2-d.vpx
  • http://r4######.vps18tiny.u.avcdn.net/vps18tiny/part-vps_windows-20092505.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 ia####.u.avast.com
    • DNS ASK f3######.vps18tiny.u.avcdn.net
    • DNS ASK 3.###l.ntp.org
    • 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 y8######.vps18tiny.u.avcdn.net
    • DNS ASK w5######.vps18tiny.u.avcdn.net
    • DNS ASK s-#####tiny.avcdn.net
    • DNS ASK r4######.vps18tiny.u.avcdn.net
    • DNS ASK p1######.iavs9x.u.avast.com
    • DNS ASK ss#.####le-analytics.com
    • DNS ASK h4######.iavs9x.u.avast.com
    • DNS ASK y9######.iavs9x.u.avast.com
    • DNS ASK s-####9x.avcdn.net
    • DNS ASK n4######.iavs9x.u.avast.com
    • DNS ASK m0######.iavs9x.u.avast.com
    • DNS ASK l4######.iavs9x.u.avast.com
    • DNS ASK j0######.iavs9x.u.avast.com
    • DNS ASK sh#####d.ff.avast.com
    • DNS ASK v7#####.stats.avast.com
    • DNS ASK go#####analytics.com
    • DNS ASK r9######.iavs9x.u.avast.com
    • DNS ASK g1######.vps18tiny.u.avcdn.net
    • '0.###l.ntp.org':123
    • '1.###l.ntp.org':123
    • '3.###l.ntp.org':123
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\temp\asw.5070e64d95d91ac1\avast_free_antivirus_setup_online_x64.exe' /cookie:mmm_ava_003_999_a4i_m:brs_msft /ga_clientid:d7ac6f85-00ae-4218-a6aa-b8339907f54f /edat_dir:%WINDIR%\Temp\asw.5070e64d95d91ac1
    • '%WINDIR%\temp\asw.1ac8cb16336e0dd1\instup.exe' /sfx:lite /sfxstorage:%WINDIR%\Temp\asw.1ac8cb16336e0dd1 /edition:1 /prod:ais /guid:0b41d1ac-8552-4b04-8b48-0df1b0020d88 /ga_clientid:d7ac6f85-00ae-4218-a6aa-b8339907f54f /cookie:mmm_ava_003_99...
    • '%WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\instup.exe' /sfx /sfxstorage:%WINDIR%\Temp\asw.1ac8cb16336e0dd1 /edition:1 /prod:ais /guid:0b41d1ac-8552-4b04-8b48-0df1b0020d88 /ga_clientid:d7ac6f85-00ae-4218-a6aa-b8339907f54f /cookie:mmm_ava_003_999_a4i...
    • '%WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswoffertool.exe' -checkChrome -elevated
    • '%WINDIR%\temp\asw.1ac8cb16336e0dd1\new_14070979\aswoffertool.exe' -checkChromeReactivation -elevated -bc=AVFA
    • 'C:\users\public\documents\aswoffertool.exe' -checkChromeReactivation -bc=AVFA
    • '%WINDIR%\temp\asw.1ac8cb16336e0dd1\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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