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Trojan.Siggen12.28056

Added to the Dr.Web virus database: 2021-03-07

Virus description added:

Technical Information

Modifies file system
Creates the following files
  • %WINDIR%\temp\asw.4efaf840c4c3bbfd\ecoo.edat
  • %WINDIR%\temp\asw.2c8b29d084f0f436\setup.def
  • %WINDIR%\temp\asw.2c8b29d084f0f436\stats.ini.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\avbugreport_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\avdump_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\avdump_x86_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\offertool_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\sbr_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswf269f822a17866b3.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswf8812e8ce018473d.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\servers.def.lkg
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uat_2972.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw19e533e9a4204677.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw3cfd819463de3425.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswabd84419c5522bbf.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uat_752.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\program.def
  • %WINDIR%\temp\asw.2c8b29d084f0f436\part-jrog2-2d.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\part-vps_windows-21030599.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\vps.def
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\gcapi_1615161424536.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\gcapi_16151614242564.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw52d65acdd1f82e00.tmp
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw1948f04c81d20426.tmp
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.dc6a1a1e-a08e-4746-b3f4-c8aa44b0e4fe
  • %WINDIR%\temp\asw.2c8b29d084f0f436\config.ini
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.cd5ff27c-4310-43cb-afad-c960b22c95d1
  • %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • %WINDIR%\temp\asw.2c8b29d084f0f436\servers.def
  • %WINDIR%\temp\asw.2c8b29d084f0f436\config.def
  • %WINDIR%\temp\asw.2c8b29d084f0f436\config.def.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\instup.exe
  • %WINDIR%\temp\asw.2c8b29d084f0f436\instcont_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\part-jrog2-80e.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\part-prg_ais-15010991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\part-setup_ais-15010991.vpx
  • %WINDIR%\temp\asw.4efaf840c4c3bbfd\avast_free_antivirus_setup_online_x64.exe
  • %WINDIR%\temp\asw.2c8b29d084f0f436\part-vps_windows-21020702.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\prod-vps.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\servers.def.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\htmlayout.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\setgui_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uat.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uat64.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uata64.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\instup.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\instup_x64_ais-991.vpx
  • %WINDIR%\temp\asw.2c8b29d084f0f436\config.def.new
  • %WINDIR%\temp\asw.2c8b29d084f0f436\prod-pgm.vpx
  • C:\users\public\documents\aswoffertool.exe
  • C:\users\public\documents\gcapi_16151614252508.dll
Deletes the following files
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uat_2972.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\uat_752.dll
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\gcapi_1615161424536.dll
  • C:\users\public\documents\gcapi_16151614252508.dll
  • C:\users\public\documents\aswoffertool.exe
  • %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\gcapi_16151614242564.dll
Moves the following files
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log.tmp.cd5ff27c-4310-43cb-afad-c960b22c95d1 to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\setup.log
  • from %WINDIR%\temp\asw.4efaf840c4c3bbfd\ecoo.edat to %WINDIR%\temp\asw.2c8b29d084f0f436\cookie.bin
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\config.def.new to %WINDIR%\temp\asw.2c8b29d084f0f436\config.def
  • from %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log.tmp.dc6a1a1e-a08e-4746-b3f4-c8aa44b0e4fe to %ALLUSERSPROFILE%\avast software\persistent data\avast\logs\event_manager.log
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\stats.ini.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\stats.ini
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswf269f822a17866b3.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\avbugreport.exe
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswf8812e8ce018473d.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\avdump.exe
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw19e533e9a4204677.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\instup.exe
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw52d65acdd1f82e00.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\instup.dll
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw1948f04c81d20426.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswoffertool.exe
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\asw3cfd819463de3425.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\sbr.exe
  • from %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswabd84419c5522bbf.tmp to %WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\htmlayout.dll
Substitutes the following files
  • %WINDIR%\temp\asw.2c8b29d084f0f436\config.def.new
Network activity
Connects to
  • 'go#####analytics.com':80
  • 'v7#####.stats.avast.com':80
  • 'ia####.u.avast.com':443
  • 'ia####.u.avast.com':80
  • 'v7#####.stats.avast.com':443
  • 'sh#####d.ff.avast.com':443
  • 'y9######.iavs9x.u.avast.com':80
  • 'y9######.vps18tiny.u.avcdn.net':80
  • 'al########nse-dealer.ff.avast.com':443
  • 'al#####qs.ff.avast.com':443
  • 'ss#.####le-analytics.com':443
TCP
HTTP GET requests
  • http://r4######.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-991.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/avdump_x64_ais-991.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/avdump_x86_ais-991.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/offertool_x64_ais-991.vpx
  • http://h4######.iavs9x.u.avast.com/iavs9x/sbr_x64_ais-991.vpx
  • http://s1######.iavs9x.u.avast.com/iavs9x/prod-pgm.vpx
  • http://r9######.vps18tiny.u.avcdn.net/vps18tiny/prod-vps.vpx
  • http://r9######.vps18tiny.u.avcdn.net/vps18tiny/part-jrog2-2d.vpx
  • http://r9######.vps18tiny.u.avcdn.net/vps18tiny/part-vps_windows-21030599.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 l2######.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 y9######.vps18tiny.u.avcdn.net
    • DNS ASK s-#####tiny.avcdn.net
    • DNS ASK r9######.vps18tiny.u.avcdn.net
    • DNS ASK r3######.vps18tiny.u.avcdn.net
    • DNS ASK n8######.vps18tiny.u.avcdn.net
    • DNS ASK s1######.iavs9x.u.avast.com
    • DNS ASK b7######.iavs9x.u.avast.com
    • DNS ASK y9######.iavs9x.u.avast.com
    • DNS ASK s-####9x.avcdn.net
    • DNS ASK r4######.iavs9x.u.avast.com
    • DNS ASK j0######.iavs9x.u.avast.com
    • DNS ASK h4######.iavs9x.u.avast.com
    • DNS ASK f3######.iavs9x.u.avast.com
    • DNS ASK sh#####d.ff.avast.com
    • DNS ASK ia####.u.avast.com
    • DNS ASK v7#####.stats.avast.com
    • DNS ASK n4######.iavs9x.u.avast.com
    • DNS ASK 3.###l.ntp.org
    • DNS ASK d3######.iavs9x.u.avast.com
    • '2.###l.ntp.org':123
    • '0.###l.ntp.org':123
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\temp\asw.4efaf840c4c3bbfd\avast_free_antivirus_setup_online_x64.exe' /cookie:mmm_ava_015_999_g5c_m /ga_clientid:05da4ce5-7c76-44f7-a778-bbba48984733 /edat_dir:%WINDIR%\Temp\asw.4efaf840c4c3bbfd
    • '%WINDIR%\temp\asw.2c8b29d084f0f436\instup.exe' /sfx:lite /sfxstorage:%WINDIR%\Temp\asw.2c8b29d084f0f436 /edition:1 /prod:ais /guid:ebb30c1d-e978-4155-87e9-69d7568cc26a /ga_clientid:05da4ce5-7c76-44f7-a778-bbba48984733 /cookie:mmm_ava_015_99...
    • '%WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\instup.exe' /sfx /sfxstorage:%WINDIR%\Temp\asw.2c8b29d084f0f436 /edition:1 /prod:ais /guid:ebb30c1d-e978-4155-87e9-69d7568cc26a /ga_clientid:05da4ce5-7c76-44f7-a778-bbba48984733 /cookie:mmm_ava_015_999_g5c...
    • '%WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswoffertool.exe' -checkGToolbar -elevated
    • '%WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\aswoffertool.exe' -checkChrome -elevated
    • '%WINDIR%\temp\asw.2c8b29d084f0f436\new_15010991\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.
    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);
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