Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /I'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /S'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /u'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /C'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /o'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /d'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /E'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /k'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /A'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /w'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /g'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /R'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /M'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /Y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /t'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /h'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /F'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'pailiuc' = '%HOMEPATH%\pailiuc.exe /N'
Creates the following files on removable media:
- <Drive name for removable media>:\Documents.lnk
- <Drive name for removable media>:\Passwords.lnk
- <Drive name for removable media>:\Pictures.lnk
- <Drive name for removable media>:\Video.lnk
- <Drive name for removable media>:\Music.lnk
- <Drive name for removable media>:\twm.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\pailiuc.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\pailiucx.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Creates and executes the following:
- %HOMEPATH%\pailiuc.exe
Modifies file system :
Creates the following files:
- %HOMEPATH%\pailiuc.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\pailiuc.exe
- <Drive name for removable media>:\pailiucx.exe
- <Drive name for removable media>:\twm.ico
- %HOMEPATH%\pailiuc.exe
- <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
- 'ns#.##ayer1532.com':8000
UDP:
- DNS ASK ns#.##ayer1532.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
