Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Update' = '%TEMP%\skyp\Microsoft Update.lnk'
Creates the following files on removable media:
- <Drive name for removable media>:\x.exe
Malicious functions:
Executes the following:
- '%TEMP%\IWTWCG.exe'
Modifies file system:
Creates the following files:
- %TEMP%\IWTWCG.exe
- %TEMP%\Data.txt
- %TEMP%\aut2.tmp
- %TEMP%\aut1.tmp
- %TEMP%\rqyldic
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\x.exe
Deletes the following files:
- %TEMP%\aut2.tmp
- %TEMP%\rqyldic
- %TEMP%\aut1.tmp
Network activity:
UDP:
- DNS ASK ta#####ctim.myftp.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
