Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'csrss.exe' = '"%APPDATA%\csrss.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss.exe' = '"%APPDATA%\csrss.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSE' = '%TEMP%\aryan.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\{%USERNAME%-aPmghgfdRnSo}\csrss.exe
Malicious functions:
Creates and executes the following:
- %TEMP%\taskman.exe
- %TEMP%\EIUDnI.exe
Executes the following:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES2.tmp" "%TEMP%\CSC1.tmp"
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\csc.exe /noconfig /fullpaths @"%TEMP%\wpfq7mvf.cmdline"
Injects code into
the following system processes:
- %WINDIR%\Explorer.EXE
Modifies file system :
Creates the following files:
- %TEMP%\EIUDnI.exe
- %TEMP%\RES2.tmp
- %TEMP%\taskman.exe
- %TEMP%\aryan.exe
- %TEMP%\wpfq7mvf.cmdline
- %TEMP%\wpfq7mvf.0.cs
- %TEMP%\CSC1.tmp
- %TEMP%\wpfq7mvf.out
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\{%USERNAME%-aPmghgfdRnSo}\csrss.exe
- %APPDATA%\csrss.exe
Deletes the following files:
- %TEMP%\wpfq7mvf.out
- %TEMP%\wpfq7mvf.cmdline
- %TEMP%\wpfq7mvf.0.cs
- %TEMP%\RES2.tmp
- %TEMP%\CSC1.tmp
Network activity:
Connects to:
- 'ye#####by1.zapto.org':5656
UDP:
- DNS ASK ye#####by1.zapto.org
- '<Private IP address>':1036
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
