Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\ok
Malicious functions
Patches code
in AMSI dll
- vxhglph.exe process, Amsi.dll module
- ok.exe process, Amsi.dll module
Modifies file system
Creates the following files
- %TEMP%\loader_dbg.log
- %APPDATA%\ok.exe
- %TEMP%\tmp2333.tmp.bat
- %LOCALAPPDATA%\microsoft\clr_v4.0_32\usagelogs\<File name>.exe.log
- nul
Network activity
Connects to
- 'localhost':6606
Miscellaneous
Creates and executes the following
- '%APPDATA%\ok.exe'
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /c schtasks /create /f /sc onlogon /rl highest /tn "ok" /tr '"%APPDATA%\ok.exe"' & exit
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\tmp2333.tmp.bat""
- '%WINDIR%\syswow64\schtasks.exe' /create /f /sc onlogon /rl highest /tn "ok" /tr '"%APPDATA%\ok.exe"'
- '%WINDIR%\syswow64\timeout.exe' 3
- '%WINDIR%\syswow64\cmd.exe' /c schtasks /create /f /sc onlogon /rl highest /tn "ok" /tr '"%APPDATA%\ok.exe"' & exit' (with hidden window)
