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Trojan.DownLoader28.36839

Added to the Dr.Web virus database: 2019-06-02

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <LS_APPDATA>\start\update_backup.exe
  • <LS_APPDATA>\start\rcx5.tmp
Infects the following executable files
  • <Drive name for removable media>:\jre-7u75-windows-i586-iftw_backup.exe
  • <Drive name for removable media>:\notepad_backup.exe
  • <Drive name for removable media>:\dotnetfx45_full_setup_backup.exe
  • <Drive name for removable media>:\skypesetup_backup.exe
  • <Drive name for removable media>:\tcm851ax32_backup.exe
  • <Drive name for removable media>:\chromesetup_backup.exe
  • <Drive name for removable media>:\utorrent_backup.exe
Creates the following files on removable media
  • <Drive name for removable media>:\bloc-notes.exe
  • <Drive name for removable media>:\jre-7u75-windows-i586-iftw_backup.exe
  • <Drive name for removable media>:\rcx8.tmp
  • <Drive name for removable media>:\notepad_backup.exe
  • <Drive name for removable media>:\rcxb.tmp
  • <Drive name for removable media>:\dotnetfx45_full_setup_backup.exe
  • <Drive name for removable media>:\rcxe.tmp
  • <Drive name for removable media>:\skypesetup_backup.exe
  • <Drive name for removable media>:\rcx11.tmp
  • <Drive name for removable media>:\tcm851ax32_backup.exe
  • <Drive name for removable media>:\rcx14.tmp
  • <Drive name for removable media>:\chromesetup_backup.exe
  • <Drive name for removable media>:\rcx17.tmp
  • <Drive name for removable media>:\utorrent_backup.exe
  • <Drive name for removable media>:\rcx1a.tmp
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
Modifies file system
Creates the following files
  • %TEMP%\hcmv.resources
  • %TEMP%\ooma.resources
  • %TEMP%\res10.tmp
  • %TEMP%\vbcf.tmp
  • %TEMP%\9o9d3yny.out
  • %TEMP%\9o9d3yny.cmdline
  • %TEMP%\6jekh6pf.0.vb
  • %TEMP%\9o9d3yny.0.vb
  • %TEMP%\jdufmmcb.resources
  • %TEMP%\resd.tmp
  • %TEMP%\vbcc.tmp
  • %TEMP%\gf9d0idk.out
  • %TEMP%\gf9d0idk.cmdline
  • %TEMP%\gf9d0idk.0.vb
  • %TEMP%\nrevpix.resources
  • %TEMP%\oampjwq6.out
  • %TEMP%\6jekh6pf.cmdline
  • %TEMP%\mq05tmiu.out
  • %TEMP%\mq05tmiu.cmdline
  • %TEMP%\mq05tmiu.0.vb
  • %TEMP%\ckzvp.resources
  • %TEMP%\qqf.resources
  • %TEMP%\res16.tmp
  • %TEMP%\lwfn.resources
  • %TEMP%\ew.resources
  • %TEMP%\aqpyriep.cmdline
  • %TEMP%\aqpyriep.0.vb
  • %TEMP%\hkdhcq.resources
  • %TEMP%\vjsmqtv.resources
  • %TEMP%\res13.tmp
  • %TEMP%\vbc12.tmp
  • %TEMP%\aqpyriep.out
  • %TEMP%\6jekh6pf.out
  • %TEMP%\icksm.resources
  • %TEMP%\resa.tmp
  • %TEMP%\vbc9.tmp
  • %TEMP%\fzrrd_kd.cmdline
  • %TEMP%\update.exe
  • %TEMP%\svchost.exe
  • <LS_APPDATA>\start\update.exe
  • %TEMP%\wta47tx5.resources
  • %TEMP%\msnpsharp.dll
  • %TEMP%\vbc18.tmp
  • %TEMP%\fzrrd_kd.0.vb
  • %TEMP%\gu6wsgqo.0.vb
  • %TEMP%\vbc1.tmp
  • %TEMP%\res2.tmp
  • %TEMP%\fzrrd_kd.exe
  • %TEMP%\tpvxc.resources
  • %TEMP%\pxaih.resources
  • %TEMP%\fzrrd_kd.out
  • %TEMP%\vbc15.tmp
  • %TEMP%\gu6wsgqo.cmdline
  • %TEMP%\res4.tmp
  • %TEMP%\gu6wsgqo.out
  • %TEMP%\jwi-ss-f.out
  • %TEMP%\jwi-ss-f.cmdline
  • %TEMP%\jwi-ss-f.0.vb
  • %TEMP%\ohrcfcfnz.resources
  • %TEMP%\u.resources
  • %TEMP%\vbc3.tmp
  • %TEMP%\res7.tmp
  • %TEMP%\whatdafock.txt
  • %TEMP%\oampjwq6.cmdline
  • %TEMP%\oampjwq6.0.vb
  • %TEMP%\q.resources
  • %TEMP%\cq.resources
  • %TEMP%\windowsupdate.ico
  • %TEMP%\vbc6.tmp
  • %TEMP%\res19.tmp
Deletes the following files
  • %TEMP%\res2.tmp
  • %TEMP%\6jekh6pf.cmdline
  • %TEMP%\6jekh6pf.0.vb
  • %TEMP%\6jekh6pf.out
  • %TEMP%\vbc12.tmp
  • %TEMP%\res13.tmp
  • <Drive name for removable media>:\skypesetup_backup.exe
  • %TEMP%\icksm.resources
  • %TEMP%\nrevpix.resources
  • %TEMP%\9o9d3yny.0.vb
  • %TEMP%\9o9d3yny.cmdline
  • %TEMP%\9o9d3yny.out
  • %TEMP%\vbcf.tmp
  • %TEMP%\res10.tmp
  • <Drive name for removable media>:\dotnetfx45_full_setup_backup.exe
  • %TEMP%\jdufmmcb.resources
  • %TEMP%\lwfn.resources
  • %TEMP%\ooma.resources
  • %TEMP%\hkdhcq.resources
  • %TEMP%\qqf.resources
  • %TEMP%\mq05tmiu.0.vb
  • %TEMP%\mq05tmiu.cmdline
  • %TEMP%\mq05tmiu.out
  • %TEMP%\vbc18.tmp
  • %TEMP%\res19.tmp
  • <Drive name for removable media>:\tcm851ax32_backup.exe
  • %TEMP%\ew.resources
  • %TEMP%\vjsmqtv.resources
  • %TEMP%\aqpyriep.cmdline
  • %TEMP%\aqpyriep.0.vb
  • %TEMP%\aqpyriep.out
  • %TEMP%\vbc15.tmp
  • %TEMP%\res16.tmp
  • <Drive name for removable media>:\chromesetup_backup.exe
  • %TEMP%\gf9d0idk.out
  • %TEMP%\gf9d0idk.cmdline
  • %TEMP%\gf9d0idk.0.vb
  • <LS_APPDATA>\start\update_backup.exe
  • %TEMP%\pxaih.resources
  • %TEMP%\tpvxc.resources
  • %TEMP%\gu6wsgqo.0.vb
  • %TEMP%\gu6wsgqo.out
  • <LS_APPDATA>\start\update.exe
  • %TEMP%\gu6wsgqo.cmdline
  • %TEMP%\res4.tmp
  • %TEMP%\fzrrd_kd.cmdline
  • %TEMP%\fzrrd_kd.0.vb
  • %TEMP%\fzrrd_kd.exe
  • %TEMP%\fzrrd_kd.out
  • %TEMP%\vbc1.tmp
  • %TEMP%\vbc3.tmp
  • %TEMP%\res7.tmp
  • %TEMP%\windowsupdate.ico
  • %TEMP%\vbc6.tmp
  • %TEMP%\vbcc.tmp
  • %TEMP%\jwi-ss-f.out
  • %TEMP%\resd.tmp
  • <Drive name for removable media>:\notepad_backup.exe
  • %TEMP%\ohrcfcfnz.resources
  • %TEMP%\u.resources
  • %TEMP%\jwi-ss-f.0.vb
  • %TEMP%\jwi-ss-f.cmdline
  • %TEMP%\vbc9.tmp
  • %TEMP%\oampjwq6.0.vb
  • %TEMP%\resa.tmp
  • <Drive name for removable media>:\jre-7u75-windows-i586-iftw_backup.exe
  • %TEMP%\q.resources
  • %TEMP%\cq.resources
  • %TEMP%\oampjwq6.out
  • %TEMP%\oampjwq6.cmdline
  • %TEMP%\ckzvp.resources
  • <Drive name for removable media>:\utorrent_backup.exe
Substitutes the following executable files
  • <Drive name for removable media>:\jre-7u75-windows-i586-iftw.exe
  • <Drive name for removable media>:\notepad.exe
  • <Drive name for removable media>:\dotnetfx45_full_setup.exe
  • <Drive name for removable media>:\skypesetup.exe
  • <Drive name for removable media>:\tcm851ax32.exe
  • <Drive name for removable media>:\chromesetup.exe
  • <Drive name for removable media>:\utorrent.exe
Substitutes the following files
  • %TEMP%\windowsupdate.ico
  • <Drive name for removable media>:\jre-7u75-windows-i586-iftw_backup.exe
  • <Drive name for removable media>:\notepad_backup.exe
  • <Drive name for removable media>:\dotnetfx45_full_setup_backup.exe
  • <Drive name for removable media>:\skypesetup_backup.exe
  • <Drive name for removable media>:\tcm851ax32_backup.exe
  • <Drive name for removable media>:\chromesetup_backup.exe
  • <Drive name for removable media>:\utorrent_backup.exe
Network activity
Connects to
  • '17#.#3.169.14':80
Miscellaneous
Creates and executes the following
  • '%TEMP%\update.exe'
  • '%TEMP%\svchost.exe'
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES16.tmp" "%TEMP%\vbc15.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\aqpyriep.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES13.tmp" "%TEMP%\vbc12.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\6jekh6pf.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES10.tmp" "%TEMP%\vbcF.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\9o9d3yny.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESD.tmp" "%TEMP%\vbcC.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\gf9d0idk.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESA.tmp" "%TEMP%\vbc9.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\jwi-ss-f.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES7.tmp" "%TEMP%\vbc6.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\oampjwq6.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES4.tmp" "%TEMP%\vbc3.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\gu6wsgqo.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES2.tmp" "%TEMP%\vbc1.tmp"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\fzrrd_kd.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\mq05tmiu.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES19.tmp" "%TEMP%\vbc18.tmp"' (with hidden window)
Executes the following
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\fzrrd_kd.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES16.tmp" "%TEMP%\vbc15.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\aqpyriep.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES13.tmp" "%TEMP%\vbc12.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\6jekh6pf.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES10.tmp" "%TEMP%\vbcF.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\9o9d3yny.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESD.tmp" "%TEMP%\vbcC.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\gf9d0idk.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESA.tmp" "%TEMP%\vbc9.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\jwi-ss-f.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES7.tmp" "%TEMP%\vbc6.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\oampjwq6.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES4.tmp" "%TEMP%\vbc3.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\gu6wsgqo.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES2.tmp" "%TEMP%\vbc1.tmp"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\mq05tmiu.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES19.tmp" "%TEMP%\vbc18.tmp"

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