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Trojan.DownLoader34.55319

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.8177af58e7855503\ecoo.edat
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\setup.def
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\stats.ini.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\avbugreport_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\avdump_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\avdump_x86_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\offertool_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\sbr_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw8d450740eeaf123d.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswcdac1792c65b9bd5.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\servers.def.lkg
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uat_228.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswfe1192bb7b74ed16.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw4f7622531e42612c.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw0c055f5a517f4368.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uat_1200.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\program.def
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\part-jrog2-d.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\part-vps_windows-20092505.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\vps.def
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\gcapi_16012674592220.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\gcapi_16012674601868.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw39dde2e2f07b835e.tmp
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswa7c478f63cffdfe7.tmp
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.171342c3-6c46-48b8-b1b4-fca25925950a
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\config.ini
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.f925d93b-5e1a-4060-8b91-5386714b2218
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\servers.def
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\config.def
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\config.def.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\instup.exe
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\instcont_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\instup.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\instup_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\part-jrog2-69d.vpx
  • %WINDIR%\temp\asw.8177af58e7855503\avast_free_antivirus_setup_online_x64.exe
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\part-prg_ais-14070979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\part-vps_windows-20090100.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\prod-pgm.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\prod-vps.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\servers.def.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\htmlayout.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\setgui_x64_ais-979.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uat.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uat64.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uata64.vpx
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\config.def.new
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\part-setup_ais-14070979.vpx
  • C:\users\public\documents\aswoffertool.exe
  • C:\users\public\documents\gcapi_16012674611132.dll
Deletes the following files
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uat_228.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\uat_1200.dll
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\gcapi_16012674592220.dll
  • C:\users\public\documents\gcapi_16012674611132.dll
  • C:\users\public\documents\aswoffertool.exe
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\gcapi_16012674601868.dll
Moves the following files
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.f925d93b-5e1a-4060-8b91-5386714b2218 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • from %WINDIR%\temp\asw.8177af58e7855503\ecoo.edat to %WINDIR%\temp\asw.f3dc6ac35052e0e3\cookie.bin
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\config.def.new to %WINDIR%\temp\asw.f3dc6ac35052e0e3\config.def
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.171342c3-6c46-48b8-b1b4-fca25925950a to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\stats.ini.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\stats.ini
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw8d450740eeaf123d.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\avbugreport.exe
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswcdac1792c65b9bd5.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\avdump.exe
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswfe1192bb7b74ed16.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\instup.exe
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw39dde2e2f07b835e.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\instup.dll
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswa7c478f63cffdfe7.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswoffertool.exe
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw4f7622531e42612c.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\sbr.exe
  • from %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\asw0c055f5a517f4368.tmp to %WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\htmlayout.dll
Substitutes the following files
  • %WINDIR%\temp\asw.f3dc6ac35052e0e3\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://s1######.iavs9x.u.avast.com/iavs9x/servers.def.vpx
  • http://p1######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://p1######.iavs9x.u.avast.com/iavs9x/avbugreport_x64_ais-979.vpx
  • http://p1######.iavs9x.u.avast.com/iavs9x/avdump_x64_ais-979.vpx
  • http://p1######.iavs9x.u.avast.com/iavs9x/avdump_x86_ais-979.vpx
  • http://p1######.iavs9x.u.avast.com/iavs9x/offertool_x64_ais-979.vpx
  • http://p1######.iavs9x.u.avast.com/iavs9x/sbr_x64_ais-979.vpx
  • http://m0######.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-d.vpx
  • http://c3######.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 v7#####.stats.avast.com
    • DNS ASK s-#####tiny.avcdn.net
    • DNS ASK c3######.vps18tiny.u.avcdn.net
    • DNS ASK n4######.vps18tiny.u.avcdn.net
    • DNS ASK r6######.vps18tiny.u.avcdn.net
    • DNS ASK r9######.vps18tiny.u.avcdn.net
    • DNS ASK al#####qs.ff.avast.com
    • DNS ASK al########nse-dealer.ff.avast.com
    • DNS ASK l4######.vps18tiny.u.avcdn.net
    • DNS ASK 0.###l.ntp.org
    • DNS ASK 1.###l.ntp.org
    • DNS ASK 2.###l.ntp.org
    • DNS ASK r0######.iavs9x.u.avast.com
    • DNS ASK 3.###l.ntp.org
    • DNS ASK m0######.iavs9x.u.avast.com
    • DNS ASK ss#.####le-analytics.com
    • DNS ASK p1######.iavs9x.u.avast.com
    • DNS ASK l2######.iavs9x.u.avast.com
    • DNS ASK z4######.iavs9x.u.avast.com
    • DNS ASK go#####analytics.com
    • DNS ASK s-####9x.avcdn.net
    • DNS ASK s1######.iavs9x.u.avast.com
    • DNS ASK f3######.iavs9x.u.avast.com
    • DNS ASK n4######.iavs9x.u.avast.com
    • DNS ASK sh#####d.ff.avast.com
    • DNS ASK ia####.u.avast.com
    • DNS ASK b7######.iavs9x.u.avast.com
    • '1.###l.ntp.org':123
    • '2.###l.ntp.org':123
    • '0.###l.ntp.org':123
    • '3.###l.ntp.org':123
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\temp\asw.8177af58e7855503\avast_free_antivirus_setup_online_x64.exe' /cookie:mmm_ava_tst_005_724_b /ga_clientid:ae4a6b05-467f-48bb-913a-71758a6d807c /edat_dir:%WINDIR%\Temp\asw.8177af58e7855503
    • '%WINDIR%\temp\asw.f3dc6ac35052e0e3\instup.exe' /sfx:lite /sfxstorage:%WINDIR%\Temp\asw.f3dc6ac35052e0e3 /edition:1 /prod:ais /guid:8d1902b1-d3d8-4268-b935-e4c93d2b6c50 /ga_clientid:ae4a6b05-467f-48bb-913a-71758a6d807c /cookie:mmm_ava_tst_00...
    • '%WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\instup.exe' /sfx /sfxstorage:%WINDIR%\Temp\asw.f3dc6ac35052e0e3 /edition:1 /prod:ais /guid:8d1902b1-d3d8-4268-b935-e4c93d2b6c50 /ga_clientid:ae4a6b05-467f-48bb-913a-71758a6d807c /cookie:mmm_ava_tst_005_724...
    • '%WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswoffertool.exe' -checkChrome -elevated
    • '%WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswoffertool.exe' -checkChromeReactivation -elevated -bc=AVFA
    • 'C:\users\public\documents\aswoffertool.exe' -checkChromeReactivation -bc=AVFA
    • '%WINDIR%\temp\asw.f3dc6ac35052e0e3\new_14070979\aswoffertool.exe' -checkGToolbar -elevated

    Curing recommendations

    1. 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.
    2. 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.
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    After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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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;
      • Switch off your device and turn it on as normal.

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