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Trojan.DownLoader34.37552

Added to the Dr.Web virus database: 2020-09-10

Virus description added:

Technical Information

Modifies file system
Creates the following files
  • %WINDIR%\temp\asw.0ffc8183f0df7ea8\ecoo.edat
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\setup.def
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\stats.ini.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\avbugreport_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\avdump_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\avdump_x86_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\offertool_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\sbr_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\aswecd1c9aad6fe5c06.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw84abc3a1b8cd3d7a.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\servers.def.lkg
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uat_572.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw7af3d4e59776606d.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw71eea5b830c33d40.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw122406b66a412c3c.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uat_2128.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\program.def
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\part-jrog2-f7.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\part-vps_windows-20090803.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\vps.def
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\gcapi_15997122522564.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\gcapi_15997122522700.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw351f8022f7a15385.tmp
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw59b9bfc3ab0e733c.tmp
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.698dca06-8750-4c37-9eac-53fd5ba9b336
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\config.ini
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.2a5da36e-8fa8-44b4-bb80-702168c3dc90
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\servers.def
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\config.def
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\config.def.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\instup.exe
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\instcont_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\instup.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\instup_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\part-jrog2-69d.vpx
  • %WINDIR%\temp\asw.0ffc8183f0df7ea8\avast_free_antivirus_setup_online_x64.exe
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\part-prg_ais-14070979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\part-vps_windows-20090100.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\prod-pgm.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\prod-vps.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\servers.def.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\htmlayout.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\setgui_x64_ais-979.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uat.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uat64.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uata64.vpx
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\config.def.new
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\part-setup_ais-14070979.vpx
  • C:\users\public\documents\aswoffertool.exe
  • C:\users\public\documents\gcapi_15997122532304.dll
Deletes the following files
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uat_572.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\uat_2128.dll
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\gcapi_15997122522564.dll
  • C:\users\public\documents\gcapi_15997122532304.dll
  • C:\users\public\documents\aswoffertool.exe
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\gcapi_15997122522700.dll
Moves the following files
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.2a5da36e-8fa8-44b4-bb80-702168c3dc90 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • from %WINDIR%\temp\asw.0ffc8183f0df7ea8\ecoo.edat to %WINDIR%\temp\asw.5ffec9ddc4a8c529\cookie.bin
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\config.def.new to %WINDIR%\temp\asw.5ffec9ddc4a8c529\config.def
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.698dca06-8750-4c37-9eac-53fd5ba9b336 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\stats.ini.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\stats.ini
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\aswecd1c9aad6fe5c06.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\avbugreport.exe
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw84abc3a1b8cd3d7a.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\avdump.exe
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw7af3d4e59776606d.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\instup.exe
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw351f8022f7a15385.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\instup.dll
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw59b9bfc3ab0e733c.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\aswoffertool.exe
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw71eea5b830c33d40.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\sbr.exe
  • from %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\asw122406b66a412c3c.tmp to %WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\htmlayout.dll
Substitutes the following files
  • %WINDIR%\temp\asw.5ffec9ddc4a8c529\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://h4######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/avbugreport_x64_ais-979.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/avdump_x64_ais-979.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/avdump_x86_ais-979.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/offertool_x64_ais-979.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/sbr_x64_ais-979.vpx
  • http://l2######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://c3######.vps18tiny.u.avcdn.net/vps18tiny/prod-vps.vpx
  • http://c3######.vps18tiny.u.avcdn.net/vps18tiny/part-jrog2-f7.vpx
  • http://c3######.vps18tiny.u.avcdn.net/vps18tiny/part-vps_windows-20090803.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 c3######.vps18tiny.u.avcdn.net
    • DNS ASK 2.###l.ntp.org
    • DNS ASK ss#.####le-analytics.com
    • 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 z4######.vps18tiny.u.avcdn.net
    • DNS ASK s-#####tiny.avcdn.net
    • DNS ASK n8######.vps18tiny.u.avcdn.net
    • DNS ASK l7######.vps18tiny.u.avcdn.net
    • DNS ASK f3######.vps18tiny.u.avcdn.net
    • DNS ASK p1######.iavs9x.u.avast.com
    • DNS ASK g1######.iavs9x.u.avast.com
    • DNS ASK t1######.iavs9x.u.avast.com
    • DNS ASK s1######.iavs9x.u.avast.com
    • DNS ASK s-####9x.avcdn.net
    • DNS ASK n4######.iavs9x.u.avast.com
    • DNS ASK h4######.iavs9x.u.avast.com
    • DNS ASK b7######.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 l2######.iavs9x.u.avast.com
    • DNS ASK 3.###l.ntp.org
    • DNS ASK j0######.iavs9x.u.avast.com
    • '2.###l.ntp.org':123
    • '0.###l.ntp.org':123
    • '1.###l.ntp.org':123
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\temp\asw.0ffc8183f0df7ea8\avast_free_antivirus_setup_online_x64.exe' /cookie:mmm_ava_tst_004_613_f /ga_clientid:4ebd5a95-edfe-4aae-a3db-9c990568763e /edat_dir:%WINDIR%\Temp\asw.0ffc8183f0df7ea8
    • '%WINDIR%\temp\asw.5ffec9ddc4a8c529\instup.exe' /sfx:lite /sfxstorage:%WINDIR%\Temp\asw.5ffec9ddc4a8c529 /edition:1 /prod:ais /guid:703ca064-3d88-4011-aece-5b2a598815ae /ga_clientid:4ebd5a95-edfe-4aae-a3db-9c990568763e /cookie:mmm_ava_tst_00...
    • '%WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\instup.exe' /sfx /sfxstorage:%WINDIR%\Temp\asw.5ffec9ddc4a8c529 /edition:1 /prod:ais /guid:703ca064-3d88-4011-aece-5b2a598815ae /ga_clientid:4ebd5a95-edfe-4aae-a3db-9c990568763e /cookie:mmm_ava_tst_004_613...
    • '%WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\aswoffertool.exe' -checkGToolbar -elevated
    • '%WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\aswoffertool.exe' -checkChrome -elevated
    • '%WINDIR%\temp\asw.5ffec9ddc4a8c529\new_14070979\aswoffertool.exe' -checkChromeReactivation -elevated -bc=AVFA
    • 'C:\users\public\documents\aswoffertool.exe' -checkChromeReactivation -bc=AVFA

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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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