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Trojan.DownLoader44.47216

Added to the Dr.Web virus database: 2022-03-24

Virus description added:

Technical Information

To ensure autorun and distribution
Sets the following service settings
  • [HKLM\System\CurrentControlSet\Services\FlashCenterService] 'ImagePath' = '"%ProgramFiles(x86)%\FlashCenter\FlashCenterService.exe"'
  • [HKLM\System\CurrentControlSet\Services\FlashCenterService] 'Start' = '00000002'
Creates the following services
  • 'FlashCenterService' "%ProgramFiles(x86)%\FlashCenter\FlashCenterService.exe"
  • 'FlashCenterService' %ProgramFiles(x86)%\FlashCenter\FlashCenterService.exe
Malicious functions
Executes the following
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FlashCenter.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCBrowserManager.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCBrowser.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "Update.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCTips.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCPlay.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCLogin.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FlashRepair.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FlashCenterService.exe"
  • '%WINDIR%\syswow64\taskkill.exe' /f /t /im mmc.exe
Modifies file system
Creates the following files
  • %TEMP%\nsp69ea.tmp
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\wasm\index
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\visited links
  • %TEMP%\nsu6a0a.tmp\shellexecasuser.dll
  • %WINDIR%\syswow64\macromed\flash\flashhelperservice.exe_tmp{c0777ece-4d7b-43b2-9209-54bf05566e5e}
  • %TEMP%\nsu6a0a.tmp\nsisdl.dll
  • C:\users\public\desktop\flash center.lnk
  • %ALLUSERSPROFILE%\microsoft\windows\start menu\programs\flash center\flash center.lnk
  • %ALLUSERSPROFILE%\microsoft\windows\start menu\programs\flash center\flash centeruninst.lnk
  • %LOCALAPPDATA%\flash_center\setting.xml
  • %APPDATA%\microsoft\internet explorer\quick launch\user pinned\taskbar\flash center.lnk
  • %LOCALAPPDATA%\microsoft\edge\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\liebao\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\google\chrome\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\sogouexplorer\webkit\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\tencent\qqbrowser\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\config.db
  • %APPDATA%\microsoft\internet explorer\quick launch\user pinned\startmenu\flash center.lnk
  • %LOCALAPPDATA%\flash_center\config.db-journal
  • %LOCALAPPDATA%\flash_center\fcbrowser\cache\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\360se6\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %ProgramFiles(x86)%\flashcenter\servicelog.txt
  • %APPDATA%\microsoft\internet explorer\quick launch\flash center.lnk
  • %ProgramFiles(x86)%\flashcenter\wow_helper.exe
  • %ProgramFiles(x86)%\flashcenter\widevinecdmadapter.dll
  • %ProgramFiles(x86)%\flashcenter\update.exe
  • %ProgramFiles(x86)%\flashcenter\swiftshader\libglesv2.dll
  • %ProgramFiles(x86)%\flashcenter\swiftshader\libegl.dll
  • %ProgramFiles(x86)%\flashcenter\ssleay32.dll
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\js\index
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\gpucache\index
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\gpucache\data_0
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\gpucache\data_1
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\f_000002
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\databases\databases.db-journal
  • %TEMP%\install_flash_player_offline_ppapi_cn_fc.exe_tmp{a83996b4-e3d1-4128-83b7-2f7153034b36}
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\f_000001
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\log
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\000001.dbtmp
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\manifest-000001
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\reporting and nel
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\reporting and nel-journal
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\quotamanager
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\quotamanager-journal
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\indexeddb\flashcenter_framework_0.indexeddb.leveldb\000003.log
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\indexeddb\flashcenter_framework_0.indexeddb.leveldb\log
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\indexeddb\flashcenter_framework_0.indexeddb.leveldb\000001.dbtmp
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\data_3
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\indexeddb\flashcenter_framework_0.indexeddb.leveldb\manifest-000001
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\data_2
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\data_1
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\data_0
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cache\index
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\local storage\leveldb\log
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\local storage\leveldb\000001.dbtmp
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\local storage\leveldb\manifest-000001
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\7bf9dc92-770b-4336-9303-c32737932411.tmp
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cookies
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\cookies-journal
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\js\index-dir\temp-index
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\wasm\index-dir\temp-index
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\gpucache\data_3
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\gpucache\data_2
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\databases\databases.db
  • %ProgramFiles(x86)%\flashcenter\sqldrivers\qsqlite.dll
  • %ProgramFiles(x86)%\flashcenter\qt5xml.dll
  • %ProgramFiles(x86)%\flashcenter\qt5widgets.dll
  • %ProgramFiles(x86)%\flashcenter\licences\libcurl\copying
  • %ProgramFiles(x86)%\flashcenter\licences\duilib\license
  • %ProgramFiles(x86)%\flashcenter\licences\chromium embedded framework\license.txt
  • %ProgramFiles(x86)%\flashcenter\images\swf.ico
  • %ProgramFiles(x86)%\flashcenter\images\split.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdf_reader.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdftoword.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdftoppt.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdftoother.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdftoimages.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdftoexcel.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdfsplit.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdfreader.ico
  • %ProgramFiles(x86)%\flashcenter\images\pdf.ico
  • %ProgramFiles(x86)%\flashcenter\images\merge.ico
  • %ProgramFiles(x86)%\flashcenter\images\compress.ico
  • %ProgramFiles(x86)%\flashcenter\icudtl.dat
  • %ProgramFiles(x86)%\flashcenter\devtools_resources.pak
  • %ProgramFiles(x86)%\flashcenter\cef_extensions.pak
  • %ProgramFiles(x86)%\flashcenter\cef_200_percent.pak
  • %ProgramFiles(x86)%\flashcenter\cef_100_percent.pak
  • %ProgramFiles(x86)%\flashcenter\cef.pak
  • %TEMP%\nsu6a0a.tmp\nsis7z.dll
  • %ProgramFiles(x86)%\flashcenter\flashcenter.7z
  • %TEMP%\nsu6a0a.tmp\nsexec.dll
  • %TEMP%\nsu6a0a.tmp\bgworker.dll
  • %TEMP%\nsu6a0a.tmp\stdutils.dll
  • %TEMP%\nsu6a0a.tmp\system.dll
  • %TEMP%\nsu6a0a.tmp\nsflashcenterplug.dll
  • %ProgramFiles(x86)%\flashcenter\licences\nsis\copying
  • %ProgramFiles(x86)%\flashcenter\licences\openssl\license
  • %ProgramFiles(x86)%\flashcenter\licences\qt libraries\license.lgpl.txt
  • %ProgramFiles(x86)%\flashcenter\locales\zh-cn.pak
  • %ProgramFiles(x86)%\flashcenter\qt5network.dll
  • %ProgramFiles(x86)%\flashcenter\qt5gui.dll
  • %ProgramFiles(x86)%\flashcenter\qt5core.dll
  • %ProgramFiles(x86)%\flashcenter\platforms\qwindows.dll
  • %ProgramFiles(x86)%\flashcenter\msvcr120.dll
  • %ProgramFiles(x86)%\flashcenter\msvcp120.dll
  • %ProgramFiles(x86)%\flashcenter\memoryupdate.dll
  • %ProgramFiles(x86)%\flashcenter\libglesv2.dll
  • %ProgramFiles(x86)%\flashcenter\libegl.dll
  • %ProgramFiles(x86)%\flashcenter\libeay32.dll
  • %ProgramFiles(x86)%\flashcenter\libcef.dll
  • %ProgramFiles(x86)%\flashcenter\imageformats\qjpeg.dll
  • %ProgramFiles(x86)%\flashcenter\imageformats\qico.dll
  • %ProgramFiles(x86)%\flashcenter\imageformats\qgif.dll
  • %ProgramFiles(x86)%\flashcenter\flashrepair.exe
  • %ProgramFiles(x86)%\flashcenter\flashsettingsservice.dll
  • %ProgramFiles(x86)%\flashcenter\flashcenteruninst.exe
  • %ProgramFiles(x86)%\flashcenter\flashcenterservice.exe
  • %ProgramFiles(x86)%\flashcenter\flashcenter.exe
  • %ProgramFiles(x86)%\flashcenter\fcplay.exe
  • %ProgramFiles(x86)%\flashcenter\fclogin.exe
  • %ProgramFiles(x86)%\flashcenter\fcbrowsermanager.exe
  • %ProgramFiles(x86)%\flashcenter\fcbrowser.exe
  • %ProgramFiles(x86)%\flashcenter\d3dcompiler_47.dll
  • %ProgramFiles(x86)%\flashcenter\d3dcompiler_43.dll
  • %ProgramFiles(x86)%\flashcenter\chrome_elf.dll
  • %ProgramFiles(x86)%\flashcenter\browsermodule.dll
  • %ProgramFiles(x86)%\flashcenter\v8_context_snapshot.bin
  • %ProgramFiles(x86)%\flashcenter\snapshot_blob.bin
  • %ProgramFiles(x86)%\flashcenter\natives_blob.bin
  • %ProgramFiles(x86)%\flashcenter\qt5sql.dll
  • %LOCALAPPDATA%\flash_center\cache\flashcenter\d9f8ff24-d2d0-40f7-8dca-2ffc22a95875.tmp
Deletes the following files
  • %ProgramFiles(x86)%\flashcenter\flashcenter.7z
  • %APPDATA%\360se6\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\fcbrowser\cache\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\config.db-journal
  • %LOCALAPPDATA%\tencent\qqbrowser\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\sogouexplorer\webkit\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\config.db
  • %LOCALAPPDATA%\google\chrome\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\liebao\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\microsoft\edge\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
Moves the following files
  • from %WINDIR%\syswow64\macromed\flash\flashhelperservice.exe_tmp{c0777ece-4d7b-43b2-9209-54bf05566e5e} to %WINDIR%\syswow64\macromed\flash\flashhelperservice.exe
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\wasm\index-dir\temp-index to %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\wasm\index-dir\the-real-index
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\js\index-dir\temp-index to %LOCALAPPDATA%\flash_center\cache\flashcenter\code cache\js\index-dir\the-real-index
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\7bf9dc92-770b-4336-9303-c32737932411.tmp to %LOCALAPPDATA%\flash_center\cache\flashcenter\localprefs.json
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\local storage\leveldb\000001.dbtmp to %LOCALAPPDATA%\flash_center\cache\flashcenter\local storage\leveldb\current
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\indexeddb\flashcenter_framework_0.indexeddb.leveldb\000001.dbtmp to %LOCALAPPDATA%\flash_center\cache\flashcenter\indexeddb\flashcenter_framework_0.indexeddb.leveldb\current
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\000001.dbtmp to %LOCALAPPDATA%\flash_center\cache\flashcenter\current
  • from %LOCALAPPDATA%\flash_center\cache\flashcenter\d9f8ff24-d2d0-40f7-8dca-2ffc22a95875.tmp to %LOCALAPPDATA%\flash_center\cache\flashcenter\network persistent state
  • from %TEMP%\install_flash_player_offline_ppapi_cn_fc.exe_tmp{a83996b4-e3d1-4128-83b7-2f7153034b36} to %TEMP%\install_flash_player_offline_ppapi_cn_fc.exe
Substitutes the following files
  • %APPDATA%\360se6\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\fcbrowser\cache\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\config.db-journal
  • %LOCALAPPDATA%\tencent\qqbrowser\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %APPDATA%\sogouexplorer\webkit\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\google\chrome\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\liebao\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\microsoft\edge\user data\default\pepper data\shockwave flash\writableroot\#sharedobjects\258y1z9z\macromedia.com\support\flashplayer\sys\settings.sol
  • %LOCALAPPDATA%\flash_center\config.db
Network activity
Connects to
  • 'to###i.flash.cn':80
  • 'ap###.flash.cn':443
  • 'to###i.flash.cn':443
  • 'ap#.#lash.cn':443
  • 'ap####2.flash.cn':443
  • 'do####ad.ffnews.cn':443
TCP
HTTP GET requests
  • http://to###i.flash.cn/hm4.gif?pr################################################################################################################################################################...
Other
  • 'ap#.#lash.cn':443
  • 'to###i.flash.cn':443
  • 'ap###.flash.cn':443
  • 'ap####2.flash.cn':443
UDP
  • DNS ASK to###i.flash.cn
  • DNS ASK ap###.flash.cn
  • DNS ASK ap#.#lash.cn
  • DNS ASK fl##h.cn
  • DNS ASK ap####2.flash.cn
  • DNS ASK do####ad.ffnews.cn
Miscellaneous
Searches for the following windows
  • ClassName: '' WindowName: ''
  • ClassName: '#32770' WindowName: ''
Creates and executes the following
  • '%ProgramFiles(x86)%\flashcenter\flashcenterservice.exe' /start
  • '%ProgramFiles(x86)%\flashcenter\flashcenterservice.exe'
  • '%ProgramFiles(x86)%\flashcenter\flashrepair.exe'
  • '%ProgramFiles(x86)%\flashcenter\flashcenter.exe' {\"launchtype\":\"/install-mini\"}
  • '%ProgramFiles(x86)%\flashcenter\flashcenter.exe' --type=gpu-process --field-trial-handle=1232,13413619463281552865,4320862935785524523,131072 --enable-features=CastMediaRouteProvider,CookieDeprecationMessages,CrossOriginEmbedderPolicy,CrossOr...
  • '%ProgramFiles(x86)%\flashcenter\flashcenter.exe' --type=utility --field-trial-handle=1232,13413619463281552865,4320862935785524523,131072 --enable-features=CastMediaRouteProvider,CookieDeprecationMessages,CrossOriginEmbedderPolicy,CrossOrigin...
  • '%ProgramFiles(x86)%\flashcenter\flashcenter.exe' --type=renderer --no-sandbox --autoplay-policy=no-user-gesture-required --enable-experimental-web-platform-features --force-device-scale-factor=1 --log-file="%ProgramFiles(x86)%\FlashCenter\deb...
  • '%TEMP%\install_flash_player_offline_ppapi_cn_fc.exe' -install
  • '%WINDIR%\syswow64\macromed\flash\flashhelperservice.exe' -Uninstall
  • '%WINDIR%\syswow64\macromed\flash\flashhelperservice.exe' -Start -dp=fc -fp=ppapi
  • '%WINDIR%\syswow64\macromed\flash\flashhelperservice.exe' -dp=fc -fp=ppapi
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /t /im mmc.exe && title CMD
  • '%WINDIR%\syswow64\cmd.exe' /c sc delete "Flash Helper Service" && title CMD
  • '%WINDIR%\syswow64\sc.exe' delete "Flash Helper Service"
  • '%WINDIR%\syswow64\cmd.exe' /c sc stop "Flash Helper Service" && title CMD
  • '%WINDIR%\syswow64\sc.exe' stop "Flash Helper Service"
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FlashCenter.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCBrowserManager.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCBrowser.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "Update.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCTips.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCPlay.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FCLogin.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FlashRepair.exe"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM "FlashCenterService.exe"' (with hidden window)

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