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Added to the Dr.Web virus database: 2019-07-18

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <SYSTEM32>\tasks\nyan
Creates the following files on removable media
  • <Drive name for removable media>:\sqlmain64.exe
  • <Drive name for removable media>:\correct.lnk
  • <Drive name for removable media>:\delete.lnk
  • <Drive name for removable media>:\join.lnk
  • <Drive name for removable media>:\archer.lnk
  • <Drive name for removable media>:\dashborder_96.lnk
  • <Drive name for removable media>:\toolbar.lnk
  • <Drive name for removable media>:\dial.lnk
  • <Drive name for removable media>:\coffee.lnk
Malicious functions
Executes the following
  • '<SYSTEM32>\taskkill.exe' /F /IM wscript.exe
  • '<SYSTEM32>\taskkill.exe' /F /IM cmd.exe
Modifies file system
Creates the following files
  • %TEMP%\sqlmain64.exe
Sets the 'hidden' attribute to the following files
  • <Drive name for removable media>:\sqlmain64.exe
Searches for the following windows
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%TEMP%\sqlmain64.exe'
  • '<SYSTEM32>\taskkill.exe' /F /IM wscript.exe' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /F /IM cmd.exe' (with hidden window)
  • '<SYSTEM32>\schtasks.exe' /Delete /tn NYAN /F' (with hidden window)
  • '<SYSTEM32>\schtasks.exe' /create /tn NYAN /tr "<Full path to file>" /sc minute /mo 1' (with hidden window)
Executes the following
  • '<SYSTEM32>\schtasks.exe' /Delete /tn NYAN /F
  • '<SYSTEM32>\schtasks.exe' /create /tn NYAN /tr "<Full path to file>" /sc minute /mo 1
  • '<SYSTEM32>\taskeng.exe' {4856D11E-B997-4B20-9A56-3462DDFB0853} S-1-5-21-1960123792-2022915161-3775307078-1001:agrjee\user:Interactive:[1]

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Doctor Web is the Russian developer of Dr.Web anti-virus software. Dr.Web anti-virus software has been developed since 1992.

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