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Trojan.DownLoader36.33700

Added to the Dr.Web virus database: 2021-01-08

Virus description added:

Technical Information

Modifies file system
Creates the following files
  • %WINDIR%\temp\asw.6e3ce9bf90dd2f10\ecoo.edat
  • %WINDIR%\temp\asw.425e33e6f7ac5693\setup.def
  • %WINDIR%\temp\asw.425e33e6f7ac5693\stats.ini.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\avbugreport_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\avdump_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\avdump_x86_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\offertool_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\sbr_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw2ad8155bd69461f0.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswf90cbb06488bb18d.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\servers.def.lkg
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uat_2248.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswf0ea2f0d2c3aa655.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw0d45d5bf6f4020cd.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswe6540193609a4101.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uat_2864.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\program.def
  • %WINDIR%\temp\asw.425e33e6f7ac5693\part-jrog2-7c.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\part-vps_windows-21010701.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\vps.def
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\gcapi_16100987261528.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\gcapi_16100987262140.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw481a8b4bae31f1e5.tmp
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw282362038c042d69.tmp
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.1f55a42a-8f25-4714-848d-7c0fe89d7786
  • %WINDIR%\temp\asw.425e33e6f7ac5693\config.ini
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.b6111977-7b3c-45ae-850f-877c7231a055
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • %WINDIR%\temp\asw.425e33e6f7ac5693\servers.def
  • %WINDIR%\temp\asw.425e33e6f7ac5693\config.def
  • %WINDIR%\temp\asw.425e33e6f7ac5693\config.def.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\instup.exe
  • %WINDIR%\temp\asw.425e33e6f7ac5693\instcont_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\instup.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\instup_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\part-jrog2-781.vpx
  • %WINDIR%\temp\asw.6e3ce9bf90dd2f10\avast_free_antivirus_setup_online_x64.exe
  • %WINDIR%\temp\asw.425e33e6f7ac5693\part-prg_ais-140a098a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\part-vps_windows-20120804.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\prod-vps.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\servers.def.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\htmlayout.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\setgui_x64_ais-98a.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uat.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uat64.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uata64.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\prod-pgm.vpx
  • %WINDIR%\temp\asw.425e33e6f7ac5693\config.def.new
  • %WINDIR%\temp\asw.425e33e6f7ac5693\part-setup_ais-140a098a.vpx
  • C:\users\public\documents\aswoffertool.exe
  • C:\users\public\documents\gcapi_16100987272768.dll
Deletes the following files
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uat_2248.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\uat_2864.dll
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\gcapi_16100987261528.dll
  • C:\users\public\documents\gcapi_16100987272768.dll
  • C:\users\public\documents\aswoffertool.exe
  • %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\gcapi_16100987262140.dll
Moves the following files
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.b6111977-7b3c-45ae-850f-877c7231a055 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • from %WINDIR%\temp\asw.6e3ce9bf90dd2f10\ecoo.edat to %WINDIR%\temp\asw.425e33e6f7ac5693\cookie.bin
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\config.def.new to %WINDIR%\temp\asw.425e33e6f7ac5693\config.def
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.1f55a42a-8f25-4714-848d-7c0fe89d7786 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\stats.ini.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\stats.ini
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw2ad8155bd69461f0.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\avbugreport.exe
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswf90cbb06488bb18d.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\avdump.exe
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswf0ea2f0d2c3aa655.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\instup.exe
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw481a8b4bae31f1e5.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\instup.dll
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw282362038c042d69.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswoffertool.exe
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\asw0d45d5bf6f4020cd.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\sbr.exe
  • from %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswe6540193609a4101.tmp to %WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\htmlayout.dll
Substitutes the following files
  • %WINDIR%\temp\asw.425e33e6f7ac5693\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://m0######.iavs9x.u.avast.com/iavs9x/servers.def.vpx
  • http://r6######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://r6######.iavs9x.u.avast.com/iavs9x/avbugreport_x64_ais-98a.vpx
  • http://r6######.iavs9x.u.avast.com/iavs9x/avdump_x64_ais-98a.vpx
  • http://r6######.iavs9x.u.avast.com/iavs9x/avdump_x86_ais-98a.vpx
  • http://r6######.iavs9x.u.avast.com/iavs9x/offertool_x64_ais-98a.vpx
  • http://r6######.iavs9x.u.avast.com/iavs9x/sbr_x64_ais-98a.vpx
  • http://c3######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://n8######.vps18tiny.u.avcdn.net/vps18tiny/prod-vps.vpx
  • http://n8######.vps18tiny.u.avcdn.net/vps18tiny/part-jrog2-7c.vpx
  • http://n8######.vps18tiny.u.avcdn.net/vps18tiny/part-vps_windows-21010701.vpx
HTTP POST requests
  • http://www.go#####analytics.com/collect
  • http://v7#####.stats.avast.com/cgi-bin/iavsevents.cgi
  • 'ia####.u.avast.com':443
  • '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 3.###l.ntp.org
    • DNS ASK 2.###l.ntp.org
    • DNS ASK 1.###l.ntp.org
    • DNS ASK 0.###l.ntp.org
    • DNS ASK b8######.vps18tiny.u.avcdn.net
    • DNS ASK al########nse-dealer.ff.avast.com
    • DNS ASK w5######.vps18tiny.u.avcdn.net
    • DNS ASK t1######.vps18tiny.u.avcdn.net
    • DNS ASK s-#####tiny.avcdn.net
    • DNS ASK r0######.vps18tiny.u.avcdn.net
    • DNS ASK n8######.vps18tiny.u.avcdn.net
    • DNS ASK z4######.iavs9x.u.avast.com
    • DNS ASK v7#####.stats.avast.com
    • DNS ASK al#####qs.ff.avast.com
    • DNS ASK s-####9x.avcdn.net
    • DNS ASK ia####.u.avast.com
    • DNS ASK sh#####d.ff.avast.com
    • DNS ASK l7######.iavs9x.u.avast.com
    • DNS ASK y8######.iavs9x.u.avast.com
    • DNS ASK p1######.iavs9x.u.avast.com
    • DNS ASK m0######.iavs9x.u.avast.com
    • DNS ASK r6######.iavs9x.u.avast.com
    • DNS ASK l2######.iavs9x.u.avast.com
    • DNS ASK c3######.iavs9x.u.avast.com
    • DNS ASK h4######.iavs9x.u.avast.com
    • DNS ASK r0######.iavs9x.u.avast.com
    • DNS ASK ss#.####le-analytics.com
    • '2.###l.ntp.org':123
    • '0.###l.ntp.org':123
    • '1.###l.ntp.org':123
    • '3.###l.ntp.org':123
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\temp\asw.6e3ce9bf90dd2f10\avast_free_antivirus_setup_online_x64.exe' /cookie:mmm_ava_012_999_a5a_m /ga_clientid:e8067dd4-41b4-436f-a2a5-fbc2c7e6050d /edat_dir:%WINDIR%\Temp\asw.6e3ce9bf90dd2f10
    • '%WINDIR%\temp\asw.425e33e6f7ac5693\instup.exe' /sfx:lite /sfxstorage:%WINDIR%\Temp\asw.425e33e6f7ac5693 /edition:1 /prod:ais /guid:1b0bb000-8320-4d04-8392-6eaf6f214a8b /ga_clientid:e8067dd4-41b4-436f-a2a5-fbc2c7e6050d /cookie:mmm_ava_012_99...
    • '%WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\instup.exe' /sfx /sfxstorage:%WINDIR%\Temp\asw.425e33e6f7ac5693 /edition:1 /prod:ais /guid:1b0bb000-8320-4d04-8392-6eaf6f214a8b /ga_clientid:e8067dd4-41b4-436f-a2a5-fbc2c7e6050d /cookie:mmm_ava_012_999_a5a...
    • '%WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswoffertool.exe' -checkChrome -elevated
    • '%WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswoffertool.exe' -checkChromeReactivation -elevated -bc=AVFA
    • 'C:\users\public\documents\aswoffertool.exe' -checkChromeReactivation -bc=AVFA
    • '%WINDIR%\temp\asw.425e33e6f7ac5693\new_140a098a\aswoffertool.exe' -checkGToolbar -elevated

    Curing recommendations

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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.
    2. 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;
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